corpse investigation department

Chapter 6 Desperate Tofu
A mentor and a disciple
As soon as the suspect Xie Wenle was sent to the detention center, a reporter from the provincial TV station rushed over to report on the case.Brother Ming, who has always been low-key, has never been interested in this kind of public work.Lao Xian stayed in the laboratory all day except eating and sleeping, and there was no door for him to be interviewed. Not to mention the "informal" Fat Lei, if he was really on TV, his indecent behavior of picking his nose from time to time would definitely destroy the image of the police.In this way, I am the only one in our department who can take on the "heavy task" of accepting interviews.

On the third day after the interview with the provincial TV reporter, the program was aired in prime time, which really made me feel cool.

"But my heart is still occupied by her every moment. She is like the moon, and she still doesn't open her mouth..." A "Half Moon Serenade" by Li Keqin rang, and I quickly picked up the phone.

"Hey, Chen Hongmei, oops, you read it, yes, we did it... (Thousands of words are omitted here)" The phone here just hung up, followed by another "Serenade".

"Hey, Xiao Biao, yes, yes, yes, it's me on TV, where is it..." Just when I was chatting enthusiastically, Fat Lei pushed open the door of my office with a bang, smiling uglier than crying, to me Said: "Xiaolong, I'm going to call you Brother Long, can you stop bragging?"

"Ah? Brother Lei, did you hear that?" My face flushed to the base of my neck, and I really blew a little hard just now.

"Fortunately, I'm the one next door to you, and I wouldn't be able to handle it if someone else did. I said I'm thick-skinned enough, and you probably wouldn't be able to pierce it with a gun." Fat Lei cheerfully threw me a cigarette, He leaned against the door frame and said with a smile.

I picked up the lighter from the table, and hurriedly got up to help Fat Lei light the cigarette, flatteringly said: "It's hard to show your face, it's an exclusive interview, you know! Hehe."

"It's okay, you're so sensible, I just pretend I didn't hear it, and you keep blowing." Fat Lei said to me with a smile while leaning against the door frame, smoking a cigarette.

Just as I was chatting vigorously with Fat Lei, Brother Ming walked into my office quickly.Seeing his serious expression, my laughter stopped abruptly.

"Don't leave after get off work, wait for me." Brother Ming left the office without waiting for my answer.Just as I was about to complain to his back, I glanced up at the electronic clock hanging on the wall. It was July 7th, and my heart suddenly warmed when I saw this date.

At six o'clock in the afternoon, Brother Ming and I stood in front of the building in the community.The community where my family is located is called "Public Security District [-]". It was the house allocated by the unit when my father started working.There are only six small buildings in the community. When I was young, uncles and aunts in police uniforms could often be seen in the community, but as time goes by, few people are willing to live in this dilapidated community.

At this time, Brother Ming was carrying a bottle of medicinal wine he made himself in his left hand, and a shoulder bag on his right shoulder, and walked straight into the unit building.Watching his figure disappear into the corridor, I quickly followed him, and the two of us stopped in front of an iron gate full of briquettes on the fifth floor.

"Open the door." Brother Ming finished speaking to me, and took the initiative to get out of the way.

I inserted the key into the lock, twisted it twice, creaked, and the rusty iron door was pushed open by me.

"Ahem, who is it?" An old voice came from the bedroom.

"It's me, Brother Ming is here too." As soon as the words fell, we went straight to the bedroom.

When my father heard me shouting "Brother Ming", he regained his energy in an instant. He threw the "Forensic Entomology" to the bedside, pulled off his reading glasses and said cheerfully, "Qiming, you are here."

"Come on, master, are you feeling better recently?" Brother Ming stepped forward with concern, carefully took off the reading glasses hanging around his father's neck with both hands, folded them and put them on the bedside table.

When I saw this scene, I said to them: "You guys talk first, I'll go boil some water."

After speaking, I gently closed the wooden door and walked towards the kitchen.

My feelings for the two men in the room are sometimes beyond my own comprehension.Since I was a child, I didn’t understand my father’s work. At that time, I didn’t understand why he would ignore me and my mother because of his work. Since he was forced to go to the police academy, I was even more resentful towards my father. I feel that he is forcibly choosing my future life, and I feel that he is restricting my freedom.So over the years, my father and I have basically rarely communicated face to face, and the only thing we spend time with him is the piles of professional books piled up on the bedside.

Brother Ming, a man I can't understand.I remember the first time I saw him come to our house, when I was in junior high school. At that time, I thought he was a strange person, and he didn't say a word wherever he went.Later, out of curiosity, I asked my father about him, and I learned from my father that Brother Ming is a forensic doctor, and his job is to dissect corpses.Hearing this made my scalp explode, and since then, seeing him has been like seeing a plague god.Even if sometimes he takes the initiative to talk to me, I dare not speak up.

Although Brother Ming's profession is a forensic doctor, he also has the word "medical". About nine years ago, he did not know where to find a massage therapy for his father's disease. Since then, as long as there is no case, he On the 15th and 30th of every month, I will come to my house once to help my father systematically massage for an hour, which has never stopped in these years.The kind of master-student love he has for his father sometimes makes me as a son feel ashamed.

For a long time, I wanted to thank this cold big brother from the bottom of my heart, but during the more than a year I have been working in the department, the image he has cultivated in my heart for many years has basically been destroyed. up.I really can't stand the way he treats me. I attribute it to personality incompatibility. To put it bluntly, I'm not the same person. If he didn't treat my father like this, I really wouldn't bother to talk to him.

call!The water vapor from the kettle opened the air valve, and I recovered from my thoughts.

I pushed open the door and brought two cups of tea into the house.At this time, the father was lying on the bed obediently, smiling like a child.Brother Ming poured the medicinal wine in the bottle onto his hands and rubbed them vigorously. After his hands became hot, he quickly pressed the acupuncture points on his father's lumbar spine and legs.

"Oops, it hurts!"

After hearing this, Brother Ming grinned and said:
"Master, if it hurts, it means you are conscious, bear with it!"

After speaking, Brother Ming hurriedly poured out half a spoonful of the medicinal wine and rubbed it vigorously twice, and pinched it hard on the acupoint where his father cried out for pain just now.

Not to mention, I didn't believe in this massage method at first, but since three years ago, one of my father's paralyzed lower limbs has miraculously become conscious. Although it is impossible to walk for a long time, he relies on It is not a problem to go to the bathroom with a walking stick.According to Brother Ming, one day, he will make my father stand up again.So when he heard that his father's other leg also felt, how could he not be happy!
Brother Ming's strange flower is here, you can say that he doesn't like to laugh, he is as happy as a flower every time he sees his father, but as soon as he leaves my house, his face immediately turns into an arctic iceberg.I vaguely remember what Fat Lei said to me. He said that among the most unforgettable things in his life, one of them was "I saw Brother Ming smile once."

My father gritted his teeth and persisted for more than half an hour. Beads of sweat the size of beans oozed from his forehead.

"Xiaolong, go and bring a basin of hot water, I'll wipe the master's body." Brother Ming said to me out of breath.

"Okay." I responded quickly and walked out, and then I brought a pot of steaming hot water into the house.In order to keep the towel warm, Brother Ming quickly plunged his hands into the hot water, picked up the towel and quickly wrung it dry. I could clearly see the bulging muscles of his cheeks and his tightly knit brows. Not everyone can bear the water temperature of more than 60 degrees.

I held the water basin and stood beside them in a daze.They gave me an illusion, as if Brother Ming was my father's son, and I was more like an outsider.

The bell rang at seven o'clock in the evening, my father leaned against the head of the bed, Brother Ming sat on the bed frame, and I moved a bench and sat by the bed.

My father adjusted his sitting posture slightly, tilted his head and said to me: "Your brother Ming told me just now that this body dismemberment case was handled beautifully." After speaking, my father gave me a thumbs up.

After being praised by him like this, my face became a little hot, because only I knew the reason for this.

"Master, Teacher Li Feng replied. He has time for the whole month next month. I want Xiaolong to study with him." Brother Ming discussed while helping his father pinch his calf.

"Study? Study what?" I asked with my ears pricked up.

"Study trace inspection, Li Feng is my younger brother, No. 1 trace inspection in Wannan Province!" My father said to me, turning his body slightly, tapping the bed frame with his fingers.

"Don't do it, I won't go." I have an instinctive aversion to this kind of thing.Because I know in my heart that the more I learn, the more I can do. If I really don’t know anything, Brother Ming wants to entrust me with the work, but I can’t do it, right?

"Do you feel that breaking such a big case is a little bit drifting?" Brother Ming stopped what he was doing, and asked with a frown.

"It doesn't matter if you're drifting. Criminal investigation TV dramas are so prevalent now that anyone with a little bit of brain knows how to wear gloves to commit crimes. Look at this case, there is no trace inspection, so it can be solved? I just don't think it is necessary to learn." I sat down On the side of the bench, he retorted angrily.

"Oh! I really don't understand what you have been doing for four years in the police academy!" My father pointed at me bitterly, and he was about to lose his temper.

Brother Ming hurriedly patted his father's chest, turned his head and said sternly to me: "Come out for me."

two force up Huashan
Unconvinced, I walked into the living room, sat down on the sofa, crossed my hands on my chest, glared at Brother Ming and said, "Why did you send me to study without my consent?"

"The people's police force is a disciplined force, you know what I want to say!" Brother Ming put his hands in his pockets and stared straight at me.

"Press me with this again—obey the orders of the superiors." I replied with a curl of my lips.

"It's good to know. You don't think you need to study? Do you think you performed well in this case?" Brother Ming asked me while standing in front of me, pointing at me.

"What? Don't expect me to solve the case?" Impatiently, I reached out and slapped the hand he was pointing at me aside.

"There are many coincidence factors in the detection of this case. Do you think there will be so many coincidences in future cases?" Brother Ming put his hand back and asked.

When I was asked by him, I didn't say anything, because what he said was indeed an objective situation.

Brother Ming took out a cigarette from his pocket, lit it, took a deep breath, and opened his mouth to ask:

"Do you yourself know how many mistakes you made in this case?"

"Wrong? I didn't use trace science in the whole case. What mistake do you think I made?" I asked a little unconvinced.

Brother Ming shook his head in disappointment, fixed his eyes on me and said, "As a trace inspector, you should always think about where there will be traces. According to Xie Wenle's account at that time, when he threw the corpse He didn't wear gloves at all, and the body was thrown against the guardrail, which is very likely to leave his fingerprints on the guardrail, have you, the so-called trace inspector, dealt with the guardrail?"

Click.Hearing this, I felt a chill in my heart, Brother Ming was right, this was indeed a relatively big negligence.

"I didn't deal with it, why didn't you remind me then? Come back now!" I retorted angrily.

"Although I am a forensic doctor, I know that fingerprints cannot be processed on this guardrail." Brother Ming suddenly said this again.

"Impossible, our textbooks clearly state that fingerprints will be left as long as they are touched, and the guardrails on the highway are all painted. This kind of smooth object is the easiest to leave fingerprints on, do you understand? ?” I sat on the sofa and began to “teach” Brother Ming.

"Yes, you are right, then tell me, what is the basis for the fingerprint comparison?" Brother Ming did not refute, but instead tested me.

No matter how I cook, I still know these basic things, so I got up from the sofa, walked around the coffee table and said: "The so-called fingerprints are some small lines, so how to identify suspects through fingerprints?" What? In fact, it all depends on some detailed features on the fingerprint, such as short sticks, small dots, forks, etc. These features are so small that ordinary people cannot distinguish them with eyes. Professional trace inspectors must magnify the photos of fingerprints several times to Carry out comparison work. Generally, ten to fourteen feature points are found, which can basically be used to identify a person."

"Well, you are very specific, and you know it yourself. We believe that fingerprints are looking for some small feature points on the lines, but the specific situation needs to be treated in detail. The guardrails on the expressway are not cleaned all the year round, and the dust layer is the largest. The thickness can reach one to two millimeters. When the palm of a person touches the guardrail, the floating dust on the guardrail is actually the first to stick. What do you expect to leave recognizable fingerprints on the guardrail?" Brother Ming stared at me blankly, waiting for my answer.

When he said this, I, who was still proud just now, immediately turned into a wilting cucumber.I calmed down a little, and shouted at him very annoyedly: "Do you think you are very happy playing with me like this? You know everything, and you still come to ask me?"

"If you are a qualified trace inspector, I, the forensic doctor, should be the one who is speechless today!" Brother Ming said the word "forensic doctor", emphasizing his tone severely.

I drooped my head and sat back on the sofa feebly.

At this time, Brother Ming walked up to me with a cigarette in his arms, looked down at me and said:

"Also, as a trace inspector, you can't just focus on handprints and footprints. In some cases, tool traces may also be the key to solving the case. Take this case as an example. The suspect used a cutting machine to decompose the body. Procedure, as the trace inspector, you still need to issue an inspection report of the cutting marks, which is used to prove that the cross-section marks at the fractured bone of the deceased were caused by the cutting machine. But can you do it well now?"

"I..." I was at a loss for words when he said that.

Brother Ming took a puff of cigarette, exhaled the smoke and continued:
"In the past two years, there have been many murders with guns. If bullet casings and warheads are found at the scene of the crime, the marks on them are the key to the verdict. When a gun case occurs, an inspection report for such marks must be issued. You can hide You can’t avoid it, but as far as I know, your knowledge of bullet marks is zero, so you still think you don’t need to learn?”

After Brother Ming finished speaking, he stood in front of me and smoked one puff after another, waiting for my answer.He waited until the end of a cigarette, and I didn't say a word.

Creaking, Brother Ming pressed the cigarette butt into the ashtray on the coffee table, took out an envelope from his pocket, threw it on the coffee table, and said to me: "This is 4000 yuan rewarded by the corpse case branch. On Sunday, Get up and go to Huashan." After finishing speaking, he walked towards his father's bedroom.

On the third day, I was forced to embark on this study trip with my suitcase. After wandering on the bus for five hours, I finally arrived at the destination of the trip—Huashan City.

Huashan City is located in the southernmost part of Wannan Province and is the most famous tourist area in Wannan Province.The entire Huashan City is surrounded by mountains and has beautiful scenery. There is the "Valley of Lovers" that makes people linger and forget to return, as well as the majestic and precipitous No. [-] peak in the world.

As soon as the bus entered Huashan City, I saw the bustling cityscape on both sides of the road, and the magnificently decorated hotels and restaurants.As the business card of Wannan Province, Huashan City can be said to be ahead of other cities in everything.

I dragged my suitcase and walked out of the station. A middle-aged man in his 50s was looking around holding a sign. He was wearing a gray shirt and a pair of police trousers, with kind eyes.I recognized at a glance that this was the class teacher introduced to me by Brother Ming, my father's younger brother, Li Feng, who is known as No. 1 in the field of trace inspection in Wannan Province.

"Teacher Li Feng." I drooped my head and walked up to the man.

"You are brother's son, Leng Qiming's subordinate, Si Yuanlong?" Li Feng looked me up and down and asked.

"Yes, hello, Teacher Li Feng." I took a deep breath and politely extended my right hand.

"Hello!" Teacher Li Feng extended his right hand very politely.

Although 1 people in my heart do not want to come to this place, but I am very flexible about the ways of the world. I adjusted myself in the shortest possible time based on the mentality of "if you come, you will be safe".

Teacher Li Feng looked at my expression, grinned, and said with a smile: "I think you are much more sensible than what your father introduced."

"Thank you teacher for your compliment, this month will cause you trouble." I smiled back.

"No trouble, no trouble. Let's go, let's hurry up, or we won't be able to make time for dinner." He picked up the suitcase next to me and walked towards the parking lot in front.

I raised my right hand in doubt and looked at my watch. Isn't it only ten o'clock in the morning? How could I be late for dinner?

The rugged mountain road for the next six hours completely dispelled my doubts.I thought Teacher Li Feng's unit was in the urban area, and I planned to have a good time in the urban area, but this is good, this car is going straight to the col.

"Xiaolong, we're here, get out of the car." Teacher Li Feng parked the car in the yard of a well-built four-story building.

As soon as I got out of the car, "Huashan City Qianshan County Criminal Science and Technology Office" appeared in front of my eyes in big gold letters.

"Mr. Li Feng, these four floors are all technical rooms?" I asked in surprise.

"Yes." Teacher Li Feng cheerfully opened the trunk and took out my luggage.

"Hey, you're so majestic. The conditions are much better than ours." I stood outside the door and looked up at 125 degrees, sighing for a while.

Teacher Li Feng stepped forward and patted me on the shoulder, smiled and said to me: "This was assigned by the previous director."

"It seems that the leader's attention is different!" I replied a little jealously.

"Whether the leader pays attention to it depends on our ability, don't you think?" Teacher Li Feng turned his head and said with a smile.

"Well, it makes sense." I seemed to hear the implication in his words.

"By the way, how many people are there in our technical room?" I asked, changing the subject.

Teacher Li Feng turned his head to me in a low tone and said:
"Currently there are two, one forensic doctor and one me. I just recruited a few this year, and they are still training in the urban area. It is estimated that I will not be able to work for a year."

"What? There are only two technicians in such a big office building?" I looked at him with some surprise.

"It's the same all over the country. There is a shortage of technicians! Excellent technicians are more precious than giant pandas." Teacher Li Feng said to me meaningfully.

"Then Mr. Li Feng, aren't you responsible for traces, inspections, and photos?" I interrupted hastily.

"It used to be, and now I have to be in charge of the forensic doctor for two months. The only forensic doctor here has been transferred to other places to handle cases." Teacher Li Feng spread his hands and said cheerfully.

"I'm dizzy! I dare you to be a poor commander..."

Three Father's Secrets

Seeing Teacher Li Feng's funny expression, I asked again with concern:
"Are you alone, are you busy?"

"It's okay, our side is a mountainous area, and the security environment is relatively good. Sometimes the police don't call the police once a week, so we can handle it."

"That's okay." Hearing this, I was secretly happy, at least I didn't have to show up all day during the study period.

Teacher Li Feng put my luggage neatly, patted the dust in his hands and said to me: "Come on, let's go into the house, I guess the lady in the cafeteria has already cooked the meal for us, I specially ordered her to cook some for you today." Wild game in Ershan!"

"Long live!" As soon as I heard the food, my halazi couldn't stop drooling.

No wonder people put mountain delicacies and seafood together into an idiom. The wild game in the mountains cannot be described in words.I ate a plate of hare by myself.The four large plates are all flat, with the bottom upside down.

I put down my chopsticks, picked my teeth with a toothpick, and said with a lot of thought:

"too delicious."

"Hey, it's good to eat." Three black lines appeared on Teacher Li Feng's forehead.According to my way of eating, the food cost will at least double.

"I've finished the meal too. I'll take you to do some activities and visit our technical room." Teacher Li Feng said to me after eating the last bite of rice.

As the saying goes, "Cannibals are soft-mouthed, but short-handed".I ate so much food from others just now, so I still have to give this little face.I patted my swollen stomach, and replied with a smile, "Okay."

"Then let's go." Said Teacher Li Feng leading the way with a smile, and I wobbled behind him.

"Here is the first floor: physical evidence room, anatomy room, physical and chemical room, and some large instruments. Here we can do DNA and poison identification."

"So advanced!" I swallowed, staring at the expensive equipment in the room and said.

"Then there is the second floor: bullet trace laboratory, footprint trace laboratory, handprint trace laboratory and tool trace comparison room, and there is also a comprehensive analysis room."

"This place is mainly used for experiments?" I stopped at the door of the laboratory and looked inside.

"It's basically like this." Teacher Li Feng replied with a nod.

"The third floor is the office and instrument room, and the fourth floor is the lounge."

Teacher Li Feng finished the introduction with great interest, then turned to me with a smile and said:

"How about it, isn't it pretty good?"

"This is the technical room with the most advanced equipment I've ever seen. It seems that the leadership really pays different attention." Leaning against the wall, I handed Teacher Li Feng a cigarette, lit it, and said with a thumbs up.

"It's only one aspect that the leader pays attention to it. In fact, this building also has a contribution from your father." Teacher Li Feng answered with a puff of cigarette.

"Cough cough cough!" Hearing his sudden words, I was choked by the smoke for a long time.I patted my chest vigorously, blushing and asked in disbelief:
"What? My father's credit? Teacher Li Feng, are you right? My father has been lying in bed for more than ten years. Judging from the shape of this house, it can only be completed for a few years at most. He has no money and no money. How can he help?"

"Do you know your father?" Teacher Li Feng asked while watching me.

I was stunned by his question and didn't know how to answer.

Teacher Li Feng looked at my expression and said, "Do you want to hear the story inside?"

I looked at his serious expression, put out the cigarette butt, put away my cynical attitude, and nodded vigorously.

Mr. Li Feng held a cigarette, turned around and stood by the window gently, he looked at the lush mountain outside the window, he was stunned for half a cigarette, and said: "Three years ago, in the big mountain opposite , a rape and murder case of a very bad nature occurred. The dead were two female college students who had just graduated. They came to our mountain for hiking with a group of self-organized donkey friends. They were finally raped and killed, and their bodies were thrown in the mountains. This This case caused a huge sensation in our city. As you know, Huashan City is the most famous tourist city in Wannan Province. It can be said that this case is equivalent to smearing a handful of ashes on the golden signboard of our Huashan City. Our city bureau immediately set up a task force and asked to solve the case within a time limit, and I was the team leader of the on-site investigation team at that time."

"When the body was found, the body was already highly decomposed. The forensic doctor of the Municipal Bureau found through autopsy that the crime occurred at least ten days before the body was found. We have many mountains here and the weather is unpredictable. During those ten days, the After three heavy rains, it can be said that the traces and evidence that should have been at the scene have basically been washed away, and there is no surveillance, no mobile phone signal in the mountains, and the suspect did not leave any biological evidence when committing the crime. It can be said that this case has no breakthrough at all. None. I was as anxious as an ant on a hot pan and couldn’t think of a clue.”

"Then how did the final case break?" I interrupted curiously.

"Fingerprint." Teacher Li Feng said these two words quickly.

"What? Fingerprints? How is this possible?" I exclaimed in disbelief.I am a student of trace inspection, and I know best in my heart that if you say that fingerprints can be left on smooth objects, I can still understand, but I really can't think of which object fingerprints can be left on in this case.

Teacher Li Feng snuffed out the cigarette with a smile and said, "Are you surprised too? Actually, my reaction was the same as yours at the time. I didn't believe that fingerprints could be extracted in this case, but your father told me it was possible."

"What? My father, he told you?" I opened my mouth wide enough to stuff a goose egg.

"Xiaolong, tell me, what are the components of the fingerprints left by ordinary people?" Teacher Li Feng asked.

I frowned and carefully recalled the few words in the textbook, and then I replied, "Is it sweat, and some exfoliated cells?"

"What you said is only a part, which is similar to what I understood at the time, but your father denied my point of view." Teacher Li Feng clasped his hands tightly when he said this, as if the case happened yesterday.

"What? My father actually denied the theoretical knowledge in the textbook?" I looked at Teacher Li Feng in disbelief.

"Textbooks are compiled by humans, but humans are not sages, and it is impossible to consider everything. At that time, the case reached a deadlock. I really had no choice but to call the teacher brother. We have trained together before. How powerful is your father?" , I know best in my heart, don't look at him lying on the hospital bed all day, he has guided the detection of many major cases on the phone over the years."

"How is this possible?" Maybe it was too much information, and I couldn't accept it for a while, and I didn't know how to respond.

"So, you don't know your father at all. He is really amazing! It can be said that no one can surpass his way of thinking about the case." Teacher Li Feng said with a look of admiration.

"What did my father tell you?" I calmed down and asked the question I was most concerned about.

Teacher Li Feng took a deep breath and said:

"At that time, we already suspected that the donkey friend who was with the deceased committed the crime, but there was no evidence in hand, so we could only stare blankly. How to find the evidence for concluding the case is the key to solving the case."

Speaking of this, Mr. Li Feng continued with his hands behind his back: "Your father also agreed with me very much at the time, thinking that the suspect was a fellow traveler, but a total of 14 men were suspected of committing the crime."

"At that time, the crime happened in mid-July, and the temperature reached more than 7 degrees. During the process of rape, the metabolism of men will speed up. Combined with the temperature at that time, your father asked me to work hard on oil."

"Grease?" I asked suspiciously.

"Yes, the skin surface of the human body will secrete a lot of oil due to metabolism, especially in summer, when the oil secretion is the most vigorous. Its components are fatty acids and glycerin. It is insoluble in water, so rain will not wash it away Drop. The suspect took off all the clothes of the two deceased during the crime, so your father boldly deduced that the suspect's grease fingerprints would be left on the clothes of the two deceased. Hearing this, I suddenly realized that now that I have figured out the characteristics of oil, the next step is to show the fingerprint lines made of oil and make them visible to the naked eye, which is considered a success. Your father has not been exposed to chemical reagents for many years, and he does not know how To mix this revealing solution, but it doesn’t bother me. In order not to destroy the physical evidence, I tried countless times with my fingerprints, and finally I found a formula that can be used on clothes.”

"No way?" I couldn't believe my ears, because this thing was beyond the scope of knowledge covered in books.

"Although I tried the formula, I still couldn't show clear fingerprints. It was only completed after your father improved it."

"What? He improved it?"

"That's right. Because the reagent I prepared is a liquid solution that is easy to absorb. Only when the clothing to be exposed is in distilled water, and then an appropriate amount of solution is added to make the chemical substances in a completely free state, will the reaction occur slowly. Otherwise, the fingerprints that appear will be black and have no value for comparison."

"Later, I used your father's improved solution to extract a large number of clear fingerprints on the underwear of the two deceased. Through it, I identified the real culprit. The successful detection of this case was recognized by many leaders, and they decided to approve the funds. This technical room was built. So I said, this building is due to your father, now you know the reason?" Teacher Li Feng patted me on the shoulder and said.

After hearing Teacher Li Feng's words, I felt very uncomfortable. I really didn't expect that my father, who was bedridden all the year round, would have so many secrets that I didn't know.Look at me with sound limbs, what have I been doing all these years?Although the police is not the career I want, but for my attitude towards everything, it is definitely not an exaggeration to describe it as "nothing".I finally know why Brother Ming always treats me with a look of hatred.Because in his heart, I was discrediting his most respected master.

Thinking of this, I couldn't calm down for a long time, and a sense of shame welled up in my heart.At night, I lay on the bed in the lounge, looking at the bright moon on the top of the mountain through the window, thinking about what Teacher Li Feng said to me, tossing and turning, it was difficult to fall asleep.

According to the teaching plan arranged by Mr. Li Feng, I picked up my notebook and sat in the handprint laboratory in an orderly manner the next morning.This is also the first time in five years that I am so motivated to learn a subject well.

Teacher Li Feng walked into the laboratory, saw me, smiled slightly, and started my first day of class without too many words.While we, master and apprentice, were studying the application of various fingerprints in the field, a strange thing happened quietly in the distant mountain village.

Four Tofu Village

"Mom, I went to the city to sell tofu. You have to take care of yourself at home these few days. You must remember to eat on time. I have meat and vegetables in the freezer at home. You can't be like before." At this time , a man in his 30s yelled into the house while working hard to move baskets of ready-made tofu to the tricycle.

An old woman with gray hair walked to the door frame with difficulty and leaned against it, she stuck her head out and said to the man, "It's okay son, I can stay at home alone, don't worry about me, remember to sell the tofu early Come back, pay attention to safety on the road, and drive slowly."

"Don't worry, mom, by the way, if you want something to eat, I'll go back to the city and buy some for you." The man wiped the sweat off his body with a towel, walked up to the old woman and said cheerfully.

"Mom, what else can I eat with this body, don't buy it, save some money." The old woman raised her right hand and gently stroked the man's face, her eyes were full of love.

"Mom, what are you talking about? We are in good health. Don't think too much about it. Wait for me to come back." The man stood beside the old woman and helped her smooth her white hair that was blown by the wind. , said cheerfully.

"Go, go, it's getting late." The old woman waved at the man and said.

"Okay. Three days at the earliest, five days at the latest, I will come back early." The man turned around with a smile, sat down on the tricycle, and turned on the ignition key.

"Mom, I'm leaving." Accompanied by the noisy tricycle starting, the man shouted loudly.

"Go." The old woman closed her eyes slightly, staring straight at the back of her son leaving until he disappeared from her sight.

Four days of study gave me a qualitative understanding of handprints.Teacher Li Feng's teaching method is ingenious, using cases to combine theory and clues to guide thinking. If this teaching method can be popularized among teachers in police schools, China's public security team will not have to worry about the lack of excellent technicians.Just as Mr. Li Feng was about to explain to me the special use of knuckle prints in the case, a piece of music came from his trouser pocket.

Teacher Li Feng took out his mobile phone, looked at the number, and his brows, which were still stretched, immediately squeezed together.

"It's a call from the police station. I'll answer it." After Teacher Li Feng finished speaking, he walked out the door.

Seeing this, I put down my pen and followed.Teacher Li Feng held the phone tightly with his right hand, and paced back and forth in the corridor with a focused look.When he hung up the phone, I hurried over and asked, "Teacher, what happened?"

"The Shanzhuang police station called and found a dead body in a family's home in Tofu Village. The deceased was hanged on the beam of the house. According to the introduction of the police station, the situation at the scene did not seem to be a suicide." Teacher Li Feng put the phone back into his pocket, Said to me.

"Murder?" I asked with wide-eyed eyes.

"It's not clear yet, let's go to the scene and have a look first."

"Okay!" I nodded, turned around and ran to the laboratory to pick up the inspection toolbox.

"Teacher, how far is the crime scene from our place?" I sat in the co-pilot seat and asked Teacher Li Feng, who was rapidly turning the steering wheel with both hands.

"There are 50 miles, in the low-altitude area." Teacher Li Feng said to me with the accelerator pedal to the bottom.

With the roar of the car, the survey vehicle circled the mountain road for more than an hour, and finally arrived at the entrance of the tofu village.

At this time, a policeman in his 40s ran over quickly.

"Xiao Zhao, what's the situation?" Teacher Li Feng asked after he stopped the car and pushed open the door of the driver's cab.

"We received a report. The deceased's name was Jiang Yuzhen, female, 53 years old. She used to be a Chinese teacher in our township central primary school. She is now retired at home. Her neighbor visited her home this morning and found her hanged on the beam of her warehouse. Next, the neighbors reported the case." Officer Zhao said to us with a notebook in his hand.

"When the incident happened, was there anyone else in the deceased's family?" Teacher Li Feng asked again.

"The deceased was divorced in the early years and had a son who just went to the city to sell tofu these days, so Jiang Yuzhen was alone at home." Officer Zhao replied.

"You said on the phone that there was something strange at the scene, what's going on?" Teacher Li Feng asked while wearing a survey suit.

"The deceased's home was turned into a mess, and I found that there was something unusual about the deceased's body. You'd better go in and have a look. After all, I'm a layman, so I can't explain clearly." Officer Zhao closed his notebook and said to us.

"Okay, let the brothers at the police station protect the surrounding scene first, and evacuate the crowd." After Teacher Li Feng finished speaking, he put on his gloves and walked towards the scene.

I stood at the entrance of the village and watched carefully. This small mountain village called Tofu Village has only thirty or so households at most. It is surrounded by mountains on three sides and faces the road on one side. with.

The home of Jiang Yuzhen at the center site is still some distance from the entrance of our village. I followed Teacher Li Feng, looked at the pieces of soybean sprouts and asked, "Teacher, why is this place called Tofu Village? Also, people from the mountains How do you grow soybeans?"

Teacher Li Feng said as he walked forward: "Although our Huashan City is a mountainous area, it is also divided into high-altitude areas and low-altitude areas. The life of the mountain people in the high-altitude areas basically depends on the young and middle-aged to collect wild mountain mushrooms in the mountains. , these mountain people in low-altitude areas do not have so many geographical advantages, so they can only find their own way. In fact, the villagers in this tofu village are quite lucky, because there is a mountain spring in this village, and the water is rich in various minerals. According to According to experts' tests, the nutritional value of this mountain spring water is definitely better than some nourishing oral liquids advertised on TV. Since there are such good natural conditions, the villagers have thought of many ways to turn this mountain spring into a stepping stone to getting rich .”

"They used to sell the mountain spring as canned water, and some people thought about making it into a drink. You know, people are very safety-conscious now. Although the villagers are very enthusiastic, but let the city people drink this water directly. Planting spring water flowing down from the mountain, not everyone has the courage."

"In the end, I don't know who came up with a way to make tofu with this mountain spring water, and then sell it to restaurants and vegetable markets in the city. Tofu is very popular among the citizens here. Tofu made with mountain spring water has a sweet taste and a bright color. Huarun has an excellent taste and is rich in nutrition. Later, our city’s TV station advertised that the tofu made with mountain spring water can be said to be in short supply.”

"Seeing this business opportunity, all the villagers in the village couldn't hold back, so they reclaimed land in the village and planted soybeans. Since the altitude of this village is below 1000 meters, the land is flat and the sunshine time is long. Although it is a mountainous area, the geographical environment here is also very It is similar to the plain, day after day, year after year, almost all the villagers in the village have the skills of grinding tofu, and gradually formed the current scale. In order to build their own brand, they changed the name of the village to 'Tofu Village'." Teacher Li Feng introduced to me as he walked.

"I just heard from Officer Zhao that the deceased's son went to the city to sell tofu and was away for a few days. Did it take so long?" I asked curiously.

Teacher Li Feng sighed lightly and said: "When it comes to this issue, I have to talk about the minority thoughts of our mountain people. Although this village has such good natural conditions, no one takes the lead in centralized management. This We really have to learn from Zhejiang merchants. Look at their leather bag villages and Taobao villages. Although this place is called a tofu village, they are all self-made. After each household makes tofu, the rich I will buy a car and transport it to the city, but most of them ride three-wheeled motorcycles. The mountain roads here are rugged, and it is normal to go back and forth for three or four days."

The two of us walked and chatted all the way, and we arrived at the scene of the crime without knowing it.

The site is a small yard facing south, with three tile-roofed houses surrounded by a circle of fences.Teacher Li Feng stood outside the fenced yard, and did not enter in a hurry, but bent down to observe carefully.

I looked at his movements strangely, and opened my mouth to ask: "Teacher, what are you doing?"

"Looking for shoe prints." Teacher Li Feng said with his head down.

"What? The yard is full of dirt roads, so there is no shoe print left!" I glanced at the uneven ground, squatted down and said to him.

Teacher Li Feng stared at the ground for a while, then turned to look at me and asked:

"Xiaolong, let me test you. Tell me, generally speaking, there are several types of shoe prints, and how are they produced?"

I heard that the eyeballs turned a little bit in the eye sockets twice, and quickly searched the relevant knowledge in the brain, so I said: "Generally, the shoe prints we see are divided into two types, one is called layered. Shoe prints, the other is called layered shoe prints.”

"The so-called superimposed shoe prints are the soles of the shoes with certain substances, which are left on the object by the weight of the human body to form the shoe prints. For example, if someone has just stepped on the mud stains, or blood, and then step on the floor, it will leave mud shoe prints or blood shoe prints on the floor. The material that forms the shoe prints is itself 'brought' in by someone from somewhere, and then A layer is 'added' on the scene, so it is called layered shoe print."

"The so-called reduced-layer shoe prints are just the opposite. They are formed by the soles of the shoes taking away certain substances on the spot under the pressure of gravity of the human body. The ground in the planting room must be covered with floating ash, and once people walk up, the floating ash on the ground will be 'taken away' by the shoes, thus reducing the scene by one layer, so it is called layer-reducing shoe print."

After listening to Mr. Li Feng, he said with great satisfaction: "Well, that's a good answer. I'm looking for layer-reduced shoe prints now."

"What? Can you find layer-reduced shoe prints on this? No way, this is hard soil, no matter how hard you step on it, there will be no 'reduced layer'." I widened my eyes and said incredulously.

Teacher Li Feng shook his head and said:
"Xiaolong, remember, excellent technicians cannot be imprisoned by the knowledge in books. Knowledge is dead, but people are alive. The specific situation should be treated in detail. You are right, this yard is full of hard However, there are also special circumstances. I just carefully looked at the weather forecast for the past few days. Recently, the sunshine time here is long and the temperature is high. The soil particles exposed to the sun will loosen due to thermal expansion and contraction. As a result, a layer of loose soil particles is formed on the surface, which is of the same nature as the 'ground covered with floating ash' you just mentioned. If people walk on such a layer of particles, they will definitely leave footprints."

After Mr. Li Feng finished speaking, he took out the sun visor and footprint lights and took a photo on the ground, and he really found two clear shoe prints.

"Awesome!" I gave a thumbs up in admiration.

Teacher Li Feng smiled slightly, took out the camera to fix the shoe prints, and we walked into the yard one after the other.

Five broad and profound trace studies
Just to the north of the courtyard are three tile-roofed houses side by side. The larger one in the middle is the main room. Adjacent to the east side of the main room is a tile-roofed house with an area of ​​about 50 square meters. The pot table was placed in it, and pots and jars were placed around the pot table. Obviously, this was the place where the tofu was made in the deceased's home.

On the west side of the main room is the location where the body was found, a high warehouse.

"Let's take a look at the corpse first." Teacher Li Feng said to me after dealing with the shoe prints in the yard.

"Okay." I nodded.

The warehouse door faces south, the door is wooden, and the door is unlocked. Teacher Li Feng took out the revealing liquid he prepared and sprayed it on the wooden door. A few fingerprints appeared in front of me.

Click, click, after a few camera shutter sounds, the wooden door was pushed open.

Accompanied by a tangy smell of corpses, the scene inside the house had a panoramic view.

A nylon rope loop as thick as a little finger was hung on the log of the beam, and the head of an old woman in her 50s was hanging in the loop, lifeless.The old woman's face was congested and swollen, her eyes were wide open and she was staring into the distance, a tongue stuck out of her mouth, and yellow viscous liquid oozed from her eyes, nostrils, ears, and corners of her mouth.Fly maggots wriggled back and forth on the face of the corpse.The neck of the corpse has been stretched and deformed, and it looks terrible.

The deceased was wearing a white long-sleeved shirt, a pair of gray trousers, and a pair of white cloth shoes.A wooden bench was placed directly under the corpse.

"Do you see what's wrong?" Mr. Li Feng stood by the door, frowned and turned to me.

"I see." I glanced at the corpse and nodded.

After Teacher Li Feng finished speaking, he looked down at the ground again. At this time, my gaze followed him.

"Hey, what's on the ground?" I asked, pointing to the withered straw all over the ground.

"It's sun-dried soybean stalks." Teacher Li Feng answered by picking up one and putting it in front of my eyes.

"Why do you spread this kind of straw on the ground?" I took the straw and observed it carefully in my hand.

"Just look at the things piled up in this room." As he spoke, he pointed to the grains piled up against the wall in the house.

I glanced at the sacks that were piled full, and said, "You mean the soybeans in this room?"

"Yes, soybeans are most afraid of getting wet. The dried straw has strong water absorption, so the villagers here usually spread this straw on the ground to prevent the ground from returning to moisture in rainy days and causing soybeans to germinate and deteriorate." Teacher Li Feng said in a speech. My side explained seriously.

"Wouldn't it mean that there are no shoe prints on the ground?" I said with some disappointment.

"Basically, let's go in and look at the corpse." Teacher Li Feng put on a mask and walked into the room first.I dropped the straw in my hand and followed behind him.

"Xiaolong, tell me what you found just now." Teacher Li Feng stood beside the bench in the room, looked up at the corpse and said.

Then I went to the feet of the corpse and said:

"The beams of this warehouse are at least four meters above the ground, and the total length of the corpse is at most 1.6 meters, and the height of the bench under the corpse's feet is at most 70 centimeters."

Then, I put my right hand flat, compared the position of the corpse's feet, and said, "I was standing on the ground, and the corpse's feet were right up to my forehead, that is to say, there should be a distance of 1.7 meters from the sole of the corpse to the ground. If the deceased had hanged himself by stepping on a bench, he would not be able to catch the rope loops on the beams at all.”

"Yes, it's no wonder that the comrades at the police station said that the scene was a bit strange, and it seems that's why." Teacher Li Feng replied while pinching his chin and glanced at the corpse.

"From this point, can it be judged that he killed him?" I asked standing beside Teacher Li Feng.

"Now that the forensic doctor is not here, I can't dissect the corpse to determine the cause of death. I can only solve it from the traces. Let's ignore the corpse. The comrades at the police station just said that there are traces of the deceased's home being turned over. Let's see where we can find it." Can’t find a breakthrough.” Teacher Li Feng made up his mind and said to me.

"Okay!" After I finished speaking, I carried the suitcase and followed him towards the door.

One minute later, we, the master and the apprentice, stood in front of the main room. The door of the main room was a double-leaf wooden door. Door.

The main room is divided into three areas. As soon as you enter the door, you will find the living room. A wooden table is placed in the north of the living room, and two wooden chairs are placed on both sides of the wooden table.On the east side of the main room is a bedroom. A wardrobe is placed on the west wall of the bedroom, and a wooden single bed is placed on the east wall. Men’s clothes are scattered everywhere in the room. Obviously, this is the bedroom of the deceased’s son. .

The west side of the main room should be the bedroom of the deceased. In the bedroom, there are a double bed, two large wardrobes, sewing machines, dressing tables and other items.

At this time, the house was in a mess, all the wardrobe doors were opened, and quilts, clothes, and sundries were thrown everywhere.

"I'm dizzy, it's like being swept away." I stood outside the door and looked around in surprise.

"Looking at the situation, it should be a thief. Let's look at the ground first." Teacher Li Feng squatted down habitually after speaking.

Flat and smooth tiles are laid inside the house, and compared with the yard, the shoe prints here are much easier to extract.

Teacher Li Feng closed the door, and when the light in the room dimmed, he took out a strong footprint light from the box.In fact, the easiest way to survey footprints is to use the principle of light reflection.

Take this case as an example, the ground of the scene is a smooth tile surface. If there are shoe prints on the ground, it is only necessary to shine a strong footprint light on the ground.The smooth ground is like a mirror, which can reflect the light along the parallel direction, and finally this dazzling parallel light cannot reach our eyeballs.But the shoe prints on the ground are different. They are rough surfaces, so the light will reflect in all directions when it hits them. This phenomenon is also called diffuse reflection.And this irregularly reflected light has a high probability of re-entering our eyeballs, so that we can see the shoe prints on the ground clearly.In addition to professional footprint lights, ordinary flashlights can also be recognized by the naked eye.And the more you are in a dark place, the clearer you can see the shoe prints, because it can avoid the interference of other lights.Therefore, Mr. Li Feng closed the door as soon as he entered the room, in order to create the effect of a dark room.

"Huh?" Teacher Li Feng asked a question.

I saw him staring at the string of shoe prints at the door and changing his position back and forth, frowning tightly, so I asked, "What's the matter, teacher? Is there a problem?"

"Yes, there are some problems with this shoe print!" Mr. Li Feng pointed to the shoe print and replied.

"What's the problem with the shoe prints?" I curiously moved my head over, and glanced at the prints on the sole of the shoe with a grid pattern.

"If my guess is correct, this shoe print is a fake shoe print!" Teacher Li Feng turned the footprint light in his hand to the strongest gear and observed it carefully again, and said to me.

"What? Camouflaged shoe prints? How did you see it?" I became more and more confused the more I listened.

Teacher Li Feng found an open space without shoe prints, and placed the footprint lights parallel on the ground. The light just showed a string of dust and shoe prints clearly, and then he took out a retractable ruler from the survey box. Picking up the teaching stick, he pointed to the edge of the shoe print and explained to me:

"In a crime scene, camouflage often occurs. What we are most often exposed to is wearing gloves and wiping fingerprints, but with the development of the times, people hear and see more and more. At the crime scene There is also the phenomenon of camouflaging shoe prints. It can be roughly divided into two types, the first is called 'small feet wear big shoes', and the other is called 'big feet wear small shoes'."

"Let's talk about the first case of 'small feet wearing big shoes'. Because the suspect's own feet are relatively small, the gravity of his body is all concentrated in the middle of the shoe print, which will make the pattern in the middle of the shoe print very clear. And the pattern on the edge of the shoe will be a little fuzzy."

"The second situation is 'big feet wearing small shoes'. The suspect wears tight shoes, and the gravity of the human body will be concentrated on the edge of the shoe, which will cause the middle pattern of the shoe print to be blurred, while the imprint on the edge of the shoe will be very clear. "

"Teacher, I don't understand why the gravity of the human body is concentrated on the edge of the shoe when 'big feet wear small shoes'? Isn't one foot stepping on the shoe? According to the principle of gravity, the entire sole should be affected. Strength is it!" I squatted aside and tilted my head, asking seriously.

After hearing this, Mr. Li Feng got up and found a men's sneaker from the house, held it in front of me, then he took out the blue foam insole from the shoe, and explained to me:
"Because the soles of the feet of normal people will have arches, and the shoes that fit the feet can basically fit the feet completely, so people can walk comfortably. But if it is a small shoe, the position of the arch cannot fit, and it is in a suspended state. Gravity will be distributed around the soles of the feet, so the phenomenon I said will appear."

"Then what if you have flat feet and no arches?" I glanced at the sneakers and looked like I was asking the bottom line.

Teacher Li Feng smiled knowingly and said: "The flat feet you mentioned are also called arch collapse. Only severe patients will have no arch at all. Patients with severe flat feet will oppress the nerves and cause pain when they walk, let alone wearing clothes that squeeze their feet." Shoes. And if it’s flat feet, the shoe prints won’t look like this. It also involves gait characteristics. I can’t explain a sentence or two clearly. I’ll analyze it for you in detail after this case is over. .” After speaking, he put the insole back into the shoe and patted the dust on his hands.

"There's so much knowledge here." I got up and put the shoes in his hand back where they were, and sighed.

Six heights of life

Teacher Li Feng walked to the side of the footprint light again, and said: "Our topic is a bit far away, now let's take a look at the series of shoe prints on the scene, all of which are clear in the middle and blurred on both sides, which is in line with "small feet wear big shoes" characteristics, so I deduce that this is a 'camouflage shoe print'. Usually only suspects would do this kind of thing, so I can judge that this string of shoe prints was left by the suspect."

I glanced at the teacher who was taking pictures of the footprints, and said doubtfully:

"If the suspect is 'big feet wearing small shoes', I can understand that although the shoes squeeze the feet, at least the shoes will not hinder the feet during the escape process. Once the 'small feet wear big shoes' is found, the shoes will not follow the feet." , can’t even run away. Why would he do this?”

"It's definitely not clear just looking at this phenomenon. Let's go through all the physical evidence and we will definitely find clues." Teacher Li Feng put down the camera in his hand and answered.

"Okay!" I mustered up my energy, and made a "come on" movement with my right hand.

Because the forensic doctor in the department was not there, everything needed to be explained by trace science. Teacher Li Feng did not dare to neglect. He did all the extraction of traces by himself, and I worked hard on the sidelines.

Three hours later, all the physical evidence extracted at the scene was brought back to the laboratory for examination.Because it is in a mountainous area and the road is rugged, the technical room here is equipped with a special dissection room, so the corpses at the scene were also taken back.

In cases involving human life, no matter when, the first step is to find clues from the corpse.Although Mr. Li Feng is an expert in trace inspection, he also knows some forensic knowledge. As an excellent technician, he must have dabbled in various disciplines.

I followed his ass to the dissecting room.

After the two of us were fully dressed, with a squeak, Teacher Li Feng opened the blue body bag.I frowned and looked at the white maggots wriggling back and forth on the face of the corpse, goosebumps all over my body stood up.

Teacher Li Feng picked up a few maggots from the corpse with tweezers and put them in the iron tray on the left. Then he observed for a long time before he said to me: "The deceased died three days ago."

"Teacher, how are you sure?" I walked up to him in two steps, staring curiously at the maggots in the tray.

"Is it because of this?"

"Yes, I deduced it from these maggots." Teacher Li Feng pulled off his mask and nodded to me.

"Teacher, tell me!" I urged eagerly.

Teacher Li Feng put down the tweezers in his hand, pointed to the milky white maggots in the tray and said to me:
"After a person dies, there will be insects parasitizing on the corpse within a few hours. The more common ones are flies. Especially in the indoor scene, the surroundings are closed, and there will be no other insects living on the corpse, so I can use Judging by the flies. The growth process of flies is generally that the larvae hatch from the fly eggs, the larvae pupate, and the pupae grow into newborn flies. During the period when the corpse is not found, the whole cycle will be repeated."

"Flies like to lay their eggs in holes or wounds on the body. Usually, if the temperature conditions are right, the fly eggs will hatch after 8 to 14 hours and the first maggots will appear."

"The first stage of development will last eight to 8 hours, and then the maggots will shed their skin. This process will last two to three days, and then the maggots will turn milky white. The next stage of development, these milky The white maggots will gnaw on the corpse frantically for about six days, then transfer from the corpse to the ground and pupate there. The general cycle from egg laying to pupation is eight days. After 14 days, you can turn into a fly."

"Let's take a look at the maggots on the face of the corpse in this case. They are all milky white, and judging from the length of the maggots, they can only grow for three days at most, so I can roughly judge the death time of the deceased."

"Teacher, you are indeed very humble, and you also said that you are not good at forensic medicine!" I said admiringly from the side.

"This is all taught by your father!" Teacher Li Feng said to me with a raised corner of his mouth.

Hearing the word "father", my heart couldn't help twitching, and the scene of my father sitting on the bedside and dipping in his saliva flipping through books came to my mind.

While I was in a daze, Teacher Li Feng brushed off the maggots on the corpse with a brush, then took off all the clothes of the deceased, and began to check the condition of the corpse.

"Judging from the spots on the corpse, it fits the characteristics of being hanged." Teacher Li Feng's words brought my consciousness back to the case.

"Teacher, what do you say?" I asked, looking down at the dark red spots on the surface of the corpse.

Teacher Li Feng pressed hard on the surface of the corpse with his hands, and said to me:

"After a person dies, the blood circulation stops, and the blood in the blood vessels begins to deposit in the lower part of the vascular network because of the lack of the power of the heart to pump blood. After the small veins are filled with blood, dark red or dark purple spots will appear through the skin. These spots are cloudy at first, and then gradually connect into sheets. They are academically called corpse spots. The dead who hanged themselves, their The corpse spots are mainly distributed on the lower limbs and lower abdomen, and they are mostly purple or dark purple. If you look at this corpse, all the corpse spots are concentrated in these parts, so there is no doubt about it."

I carefully observed the direction of his palm movement, and a detail caught my attention, so I asked:
"Teacher, why are the corpse spots on the deceased's hands blue and purple?"

Teacher Li Feng raised the dead man's hands when he heard the words, and after careful observation, he replied: "It's hard to say whether this is a corpse spot, and I can't judge at present."

"This is a doubtful point. I will record it. Shall we look at other parts first?" I asked tentatively.

Teacher Li Feng nodded, and focused his attention on the neck of the deceased:
"There is no trauma on the surface of the corpse. The fatal wound is the strangle mark." He took out a ruler and stuck it on the strangle mark. The width of the rope is basically the same."

"In other words, the deceased was strangled to death by this rope?" I glanced at the rope next to the corpse and asked.

Teacher Li Feng shook his head:

"I can't say that, because I can't dissect the corpse alone, and the specific cause of death can't be judged accurately. But as far as I can see, there are two situations: first, the deceased was strangled alive by hanging in a rope ring Second, the deceased had been killed beforehand, and then hung in a rope ring, in order to create the illusion of suicide by hanging.”

"But now we can't figure this out with just a dead body!" I looked a little anxious on the side.

"You're right. We two laymen can only be in a hurry. We can only get so much information from the corpse. Let's refrigerate the corpse first and go to see other physical evidence." Teacher Li Feng said and put the corpse into the freezer With a push, it took me to the trace laboratory.

"Teacher, what should we do next?" I asked from the side.

"Measure the height difference first." Teacher Li Feng took out the nylon rope loop brought back from the scene from the evidence bag and put it on the workbench in the laboratory.

"Teacher, ruler!" I hurriedly took out a tape measure from the evidence box and handed it over.

Teacher Li Feng took it, pulled out the ruler, restored the rope loop to the state when it was hanging on the beam, and measured the distance between the two ends: "123 cm, Xiaolong, please record it."

"Okay, teacher." I took out the notebook and quickly wrote a string of numbers on it.

Teacher Li Feng watched me stop writing, and said to me: "Go and bring me the bench at the feet of the deceased."

"Yeah." I put down the notebook, put on my gloves and walked towards the wooden bench by the door.

"Teacher, here!" I handed the bench to Teacher Li Feng with both hands.

"Put it on the workbench, and I'll measure the height." Then, Teacher Li Feng pulled out the tape measure and got ready.

With a click, with the sound of the bench legs hitting the work surface, Teacher Li Feng quickly leaned the tape measure up: "The height is 74 cm."

Swish, I wrote down the number again.

Teacher Li Feng moved the tape measure away from the bench and said to me: "When we were investigating the scene, there was no stepping object higher than this wooden bench in the deceased's home, so this wooden bench should be carefully selected by the suspect. Measuring its height is very telling."

"Teacher, what do you mean...?" I seemed to understand something.

"Xiaolong, can you see how long the corpse is?" Teacher Li Feng didn't answer my question, but continued to ask.

I hurriedly turned the notebook forward a few pages, and found a string of numbers among a lot of data: "Teacher, 162 centimeters."

"What is the distance from the top of the beam log to the ground?" Teacher Li Feng asked again, putting down the ruler in his hand.

I then quickly flipped forward a few pages in the notebook, locked on a number and hurriedly said: "419 centimeters."

"Let's calculate the difference now. The total height is 419 centimeters, minus the length of the rope loop 123 centimeters, minus the length of the corpse 162 centimeters, and minus the height of the bench 74 centimeters, what is it?"

While listening, I quickly took out my mobile phone and turned on the calculator. As soon as Teacher Li Feng finished speaking, I reported a series of numbers: "Teacher, it's exactly 60 centimeters."

Teacher Li Feng glanced at the number on my phone and said to me, "It means that the deceased was standing on a chair, and there was a 60cm drop between the top of the head and the bottom of the rope ring."

"Teacher, I have a question." I interrupted.

"You said."

"If the deceased stood on tiptoe and stretched out her arms, would she touch the bottom of the rope ring? If she could touch it, she would seem to be able to put her head into the rope ring with a little force with both hands. Of course , this is only on the assumption that the deceased committed suicide." I said what I thought.

Teacher Li Feng seemed to have been prepared for a long time, smiled slightly, and said to me confidently: "Look at the length of the deceased's forearm and the length of the deceased's shoes, and report these two data to me."

Hurray, I flicked through the notebook vigorously, looking for it carefully.

"With the teacher, the forearm is 24 cm long and the shoe is 22 cm long."

"Well, the arm span of a normal person is about the same as a person's height, but if you lift your hands up to do some kind of labor, the actual 'working distance' of that person's arm is only the length of the forearm, that is, you Raise your hands above your head. At this time, the total length is basically equal to the length of your forearm plus your original height. The deceased stood on tiptoe, which was only 22 centimeters at most. She couldn't have learned ballet, so stand on tiptoe? "

"Even if calculated according to the limit figure, if the height difference of 60 centimeters is subtracted from the length of her forearm and shoes, there is still a difference of 14 centimeters. This difference cannot be crossed by the deceased. From this we can judge However, the rope loop on the beam cannot be tied by the deceased himself. The person who tied the rope loop must be at least 14 centimeters taller than the deceased, that is to say, his height is above 176 centimeters. According to the actual situation, the suspect may not be lower than 1.8 meters." Teacher Li Feng's thinking was extremely quick, and I was dumbfounded when I heard it.

[-] my guess
"Xiaolong, go and bring me the footprint lights. I'll see if I can extract the shoe prints on the bench." Teacher Li Feng said to me who was still trying to digest the knowledge in my head.

"Oh, good." I just came back to my senses.

"Teacher, here."

Teacher Li Feng took the footprint light, shined it on the bench, and said to me with some disappointment: "There are no shoe prints, it seems that it has been processed."

"Teacher, didn't we extract a lot of shoe prints on the ground of the main room at the crime scene, it doesn't matter if there are none here." I said aside.

"Yes, let's go Xiaolong, let's go and see our best physical evidence." Teacher Li Feng put his arms around my shoulders and walked towards another laboratory.

beep!As soon as Teacher Li Feng entered the room, he pressed a red button in the laboratory.A huge LCD screen on the wall of the laboratory was turned on.

With the unique boot sound of Windows XP system, the computer in the laboratory is already on.Teacher Li Feng exported photos of shoe prints from the camera and arranged them neatly on the computer screen.I stood aside, took the notebook and prepared to record.

Teacher Li Feng stared at the screen, pinched his chin and said: "A total of five shoe prints were extracted at the scene, one of which was left by the reporter, and the other was left by the police at the police station. The remaining three shoe prints are the next ones. We need targets for research."

Teacher Li Feng compiled the serial numbers of these three kinds of shoe prints, and then said: "The code number of the No. 1 shoe print is the same as that of the deceased, and the pattern of the sole is also similar, so the No. 1 shoe print can be directly ignored."

At this time, Mr. Li Feng clicked on the software and began to measure the values ​​of No. 2 and No. 3 shoe prints. At this time, a series of numbers appeared on the computer, which made his eyebrows twitch.

I noticed Teacher Li Feng's strangeness, and hurriedly leaned my head towards him and asked, "Teacher, what's the matter?"

"There's something strange about it."

"What? How should I say it?" My mood at this moment became tense along with the teacher's expression.

"We estimated that the suspect's height is no less than 1.8 meters through the height drop of the rope, but if you look at the length of these two shoe prints, they are both only 25 centimeters, which is 40 yards when converted into a size."

"The No. 2 shoe print has a very regular gait indoors, which shows that the owner of this shoe print walked indoors very casually, so I can infer that this shoe print should belong to the deceased's son."

"So the most suspicious thing at the moment is the No. 3 shoe print, which is the 'camouflage shoe print with small feet wearing big shoes' we found at the scene. The No. 3 shoe print is only a size 40."

"If you want to cause the situation at the scene, the suspect's feet should be at least two sizes smaller than 40 yards, otherwise there will be no such obvious camouflage shoe prints on the scene. Xiaolong, think about it, a 1.8-meter foot Big man, how could his feet be so small?" Teacher Li Feng turned to me and asked me in surprise.

At this time, I was staring at the photos on the big screen and thinking carefully, and suddenly I also discovered a detail, and said to him: "Teacher, take a closer look at the photos of the scene, it seems that there are more than one suspicious points."

"What?" Teacher Li Feng followed my gaze to the big screen after hearing my words.

I picked up a wooden stick from the table in the laboratory, pointed to an overview photo in the deceased's bedroom and said, "Teacher, look, if the suspect committed robbery and murder, his goal should be money, but you Look at the broken ceramic ornaments in the room, and look at this photo, which is an overview photo of the deceased's son's bedroom. All the water glasses on the table were broken, and the movement of these things must be very loud. What is the purpose of doing it?"

Teacher Li Feng frowned after hearing what I said, and didn't make a sound.

"Also," I cleared my throat and continued, "Why did the suspect hang the deceased in the rope ring? If it is to create the illusion of hanging himself to avoid the police's investigation, then why did he turn the house so open?" Chaos? What is his purpose in doing this?"

"Yes, when most people see this situation in the house, they must think that a thief has entered. This contradiction is really difficult to explain." Teacher Li Feng nodded and said.

"Will this happen?" I rolled my eyes and thought of a seemingly explainable reason.

"What's the situation?" Teacher Li Feng asked hastily.

"It was one person who killed Jiang Yuzhen, and another person who broke into the house."

"You mean, the fake shoe print on the floor of the main room was left by a thief, and there was another person who hanged the deceased in the warehouse?" Teacher Li Feng asked with some surprise.

"And I have a bold guess." I squinted my eyes and whispered to Teacher Li Feng.

"What guess?"

"The deceased had no external injuries except strangle marks, which means that she did not fight the suspect before she died, so the suspect is most likely an acquaintance. Teacher, do you think the suspect killed the deceased and hung him on the beam You faked the scene of suicide, thinking you did it flawlessly, but what you didn’t expect was that another thief broke into the house, which caused the current situation?" I stared at Teacher Li Feng, waiting for his answer.

"High! You are worthy of being the son of a senior brother, and your brain is so fast." Teacher Li Feng praised.

"Didn't we extract a large number of fingerprints at the scene? We can start from this, exclude the deceased and her son, and see how many unfamiliar fingerprints are on it. The fingerprints will definitely explain the problem." I said confidently.

"Fingerprints are one aspect. Our next step is to investigate the social relationship of the deceased to see if she has any enemies." Teacher Li Feng added.

"Mom!" Just as our master and apprentice were discussing the direction of the next step in the investigation of the case, a heart-piercing voice came from outside the yard of the technical room.

"Teacher, could it be that the son of the deceased is here?" I looked out the window in surprise, looking for the source of the sound.

Teacher Li Feng said to me: "I happen to have something to ask him, let's go out and have a look."

I followed behind the teacher and quickly came to the yard.

At this time, a policeman in a public security uniform was grabbing a man's jacket and said in embarrassment: "Oh, you can't go in. This is the technical room, not where you should come."

"Mom, I want to see my mother, please do me a favor and let me in." The man clasped his hands together, begging and bowing to the policeman.

"No, the case is still under investigation, you can't make trouble for us!" The police refused to let go.

When the two were arguing, Teacher Li Feng and I walked up to them.I took a closer look, and the policeman in front of me was the officer Zhao I saw at the scene of the crime. At this moment, he was holding a man in his 30s tightly with both hands.The man's height is about the same as mine, about 1.7 meters five, wearing a gray T-shirt, a pair of jeans, and leather sandals on his upper body. His face with Chinese characters is full of sadness, and tears are streaming from the corners of his eyes.

When Police Officer Zhao saw us, he said with a sad face, "Director Li, he is Jiang Liang, the son of the deceased. After we called him to tell him the situation, he took a taxi from the city and came back. His mother, we can't stop him."

"Xiao Zhao, let him go, I just have something to ask him." Teacher Li Feng glanced at the man next to Police Officer Zhao, and said.

"Hey." Officer Zhao let go of his hands after listening to the words.

"Xiao Zhao, go ahead and seal off the scene, and don't let anyone in. We may need to re-survey the scene." Teacher Li Feng urged.

"Understood Director Li, then I'll go first." Officer Zhao patted the dust off his body, turned his head and walked towards the police car with flashing lights.

"Officer, where is my mother? I want to see my mother!" The man named Jiang Liang said tremblingly, pinching my shoulders with both hands.

"Young man, you can't come back from the dead, you have to mourn. Since we took over the case, we will definitely give you an explanation. In order to solve the case as soon as possible, please use the shortest time to adjust yourself, we have a few very important questions to ask You." Teacher Li Feng patted Jiang Liang's shoulder to persuade him.

Jiang Liang looked at Teacher Li Feng blankly, and nodded weakly.

"Then let's go, let's go into the room and talk." Afterwards, Jiang Liang was brought into the office.

I looked at the heartbroken Jiang Liang, and felt a little uncomfortable, so I went to the water dispenser, poured a glass of water, put it in his hand, and comforted me: "It has happened, don't be too sad, drink some water .”

Jiang Liang took the water glass with both hands and gave me a grateful look.

"Your name is Jiang Liang, right?" Teacher Li Feng glanced at him who had calmed down a little, and asked.

"Yes." Jiang Liang put the water glass aside and nodded.

"When did you leave home?" Teacher Li Feng took out a note paper to record.

"I left the village on the morning of August 8th." Jiang Liang said, wiping the tears from the corners of his eyes.

"According to our inference, your mother was also killed on August 8." Teacher Li Feng said with a sigh.

"What? My mother was fine when I left, why did she... woo!..." Jiang Liang put his head in his hands and cried again.

Teacher Li Feng stopped writing and looked at the man in front of him quietly.

I stepped forward and patted his back, comforting him: "We understand your feelings, but you still have to restrain yourself a little bit, the sooner you find clues, the sooner you can catch the murderer, do you understand?"

"Well, well, I see, officer." Jiang Liang replied with a sob.

Eight White Lies
"Can you tell me about your family situation?" Teacher Li Feng asked Jiang Liang, handing him a tissue.

"My family's situation is quite special. As long as I can remember, my mother has been teaching in the central primary school in our township, but the school's salary was very low at that time, and we lived in a low-altitude area in the mountains, and there were no other sources of income. In order to subsidize the family, my father went out to work with people from other villages, but he never came back after he left. We found out later that he fell in love with other women outside. My mother and my father Divorced, she brought me up with her meager income. I don’t live up to it, my mother is also a very well-known teacher in our village, and she can definitely be regarded as a high-level intellectual, but I didn’t get into college. After graduating from high school, I learned to grind tofu from others at home, and I have been doing it until now." Jiang Liang said, wiping away tears.

"How old are you this year?" Teacher Li Feng asked while recording on paper.

"31."

"Are you married yet?" Teacher Li Feng asked again.

"No, no, no." Jiang Liang replied a little shyly.

Teacher Li Feng also wisely did not pursue the question, but changed the subject and asked, "How is your mother's usual behavior? Has she offended anyone? Or, do you have any enemies?"

Hearing this, Jiang Liang opened his eyes and retorted vigorously:
"Impossible, how can she have enemies? In our village, people who are about my age, or even younger than me, are basically her students. She has a high prestige in the village. And my mother has a very good temper. Anyone can get together, in my memory, she has never blushed with anyone, how could she have enemies?"

"Your mother usually doesn't leave the village?" Teacher Li Feng continued to ask.

"In the past, she basically didn't go out in the village, but she occasionally went to the urban area in the past two years." Jiang Liang wiped the tears on his cheeks and lowered his voice.

"What are you doing in the city?" Teacher Li Feng asked with a frown.

"I remember it was last year. My mother had a little thumb-sized lump on her neck, and she kept crying for pain. So I took her to the hospital for a checkup while selling tofu. Later she told I had a lipoma on my neck, nothing serious. Then this year, I accompanied her to the hospital several times. My mother has been out so many times.” Jiang Liang recalled carefully.

"Were you around when your mother checked?" Teacher Li Feng asked thoughtfully.

"No, she takes a long time for each check-up. As soon as I sent her to the hospital, she asked me to sell tofu and pick her up later." Jiang Liang replied in a low voice with his body bent.

"Which hospital do you send your mother to every time?"

"Huashan City No.1 People's Hospital." Jiang Liang looked up at us and replied very sadly.

Teacher Li Feng stopped writing and said:
"Well, we understand the general situation. You can't go back to your house for the time being. You should borrow at a relative's house recently. Because the case has not been solved, we still need to re-investigate the scene."

"I see, officer." Jiang Liang nodded.

"Xiaolong, go and collect his fingerprints and footprints." Teacher Li Feng turned his head and said to me who was standing aside.

I nodded and brought Jiang Liang into the collection room.

After the fingerprint samples were collected, Jiang Liang left the yard of the technical room with reluctance. He still failed to see his mother's body today. It was not because we were unkind, but because there were still too many puzzles to solve. open.

I stood at the door of the technical room building, watching Jiang Liang's lonely back disappear into the distance.At this time, there was the sound of pattering footsteps in the corridor, and Teacher Li Feng walked slowly to my side and said:
"Xiaolong, I have compared the fingerprint samples. Except for the fingerprints of the deceased and Jiang Liang, there are no other fingerprints of strangers at the scene. The No. 2 shoe print is also left by Jiang Liang."

"What? The suspect is wearing gloves?" I came back to my senses and turned my head to ask.

"There is such a possibility." Teacher Li Feng replied with a little disappointment.

"The key is that we didn't get any valuable clues from Jiang Liang." I sighed.

"It's not that there are no clues, but I don't know if there is any point in investigating." Teacher Li Feng said with some confusion.

"Why don't you check if there are clues?" I asked with a puzzled look at Mr. Li Feng's sad face.

"During the questioning just now, I noticed a detail. Jiang Liang said that his mother had a pimple on her neck, and it was very painful. After examination, it was a lipoma." Teacher Li Feng looked into the distance and murmured.

"Yes, there is such a sentence, I heard it too." I nodded and replied.

"Lipoma is a common benign tumor that can occur anywhere with fat, and is most common under the skin. In fact, it is just a lump of flesh, and there is no pain at all. And Jiang Liang also mentioned a detail, his mother Every inspection takes a long time."

"Yes, he did." I replied with certainty.

"As for the diagnosis of lipoma, students in general medical universities can distinguish it with a little pressing, and it can definitely be diagnosed within one minute." Teacher Li Feng looked at me directly and said.

"You mean, the deceased lied to her son? The bumps on her body are not lipomas?" I immediately understood what Teacher Li Feng was trying to express.

"According to the current judgment, it should not be a lipoma, so I am considering whether to go to the hospital for investigation. But even if it is found that the deceased suffered from a certain disease, it seems that it has nothing to do with the case." Teacher Li Feng sighed Said in one breath.

"Teacher, anyway, there are so many problems that can't be explained, so let's go and have a look, maybe you can find important clues." I tried my best to persuade.

"Okay, let's go to the hospital early tomorrow morning." Teacher Li Feng also made up his mind after hearing what I said.

The next day, with the first ray of sunrise in the morning, we embarked on the road of investigation.After nearly five hours of turbulence, our car stopped at the main entrance of the hospital.

Huashan City No.1 People's Hospital is one of the few tertiary hospitals in the city. The hospital is composed of four high-rise buildings, which are very impressive. Even though it is almost lunch time, the hospital building is still full of people.

Teacher Li Feng took me straight to the archives of the hospital.The archives room is located in the administrative building of the hospital. As long as the patients in the hospital see a doctor, they can find relevant information here.

We walked to a window and handed the police ID card and letter of introduction to the staff inside. A beautiful girl took it with a smile and asked sweetly: "Officer, do you need all the medical information of Jiang Yuzhen in the past two years?" ?"

"Yes, I'm sorry to trouble you." Teacher Li Feng put his head to a glass window that was only the size of an A4 paper, and replied politely.

"Okay, wait a minute." The girl put away her smile and typed quickly on the keyboard meticulously.

Beep beep, the printer next to the computer made the sound of warming up. After 2 minutes, sheets of printing paper were quickly swallowed.

Swish, the girl skillfully put away the warm stack of papers in her hands, tapped them on the table, and after they were neatly arranged, she also thoughtfully bound them for us with a stapler.

Seeing this scene, I sighed in my heart: "The quality of the doctors in Huashan is really good!" I stretched my hand in while thinking.When I took the printed materials out, the girl refused to let go.

I looked at her suspiciously.

"Hello, 40 yuan." After the girl finished speaking, she stretched out her right hand in front of me, and her left hand was still tightly holding the printed materials.

"I'm dizzy, why don't you grab it? You ask me for 40 yuan for ten sheets of paper? It's only a few cents for printing at the school gate." I poked my head and said loudly to the girl.

When the girl heard this, her face immediately changed, she took back the materials, and said angrily: "The hospital has regulations, whether you want to be beaten or not."

"That's right, 40 is 40, I really convinced you." I was just about to take money out of my pocket, when Teacher Li Feng cheerfully handed in a "Grandpa Mao" and said to me: "Now you know Well, you need money for everything you do here.”

"Teacher, it turns out that you already knew that there would be a fee, and you are still here to see my jokes." I said angrily.

"I see that you chatted so speculatively with this little nurse, so I don't want to disturb you." Teacher Li Feng's old naughty temper possessed him again.

"Teacher, don't make fun of me. Here, Jiang Yuzhen's medical treatment materials."

Teacher Li Feng took it and turned to the first page. He was cheerful just now, but his expression became ugly in a blink of an eye.I saw him flipping through the materials page after page without making a sound, so I asked anxiously, "What's wrong, teacher? Is there something wrong?"

"Yes, the situation is not small." Teacher Li Feng closed the file and turned to me and said.

"What's the matter?" I widened my eyes and waited for his answer.

"In this material, except for the name of a doctor named Xu Jiajian, which I can barely understand, I can't understand anything else." Teacher Li Feng finished speaking and handed the material to me again.

I turned to the first page curiously:
"Damn, is this painting or writing? The 40 yuan is for nothing!" I quickly turned to the last page and said distressedly.

"Let's go, before they have a break at noon, quickly contact this doctor named Xu Jiajian and ask him to explain the situation to us face to face." After Teacher Li Feng finished speaking, he walked quickly towards the elevator.

After asking around, we found this doctor in the oncology department who wrote like "ghost-drawing symbols".After showing our documents and exchanging a few simple greetings, we explained our purpose.

Dr. Xu took the printed materials and flipped through them quickly, then raised his head and said to us: "I remembered, the pimple on the neck of this patient named Jiang Yuzhen is not a lipoma, she is suffering from lymphoma, she came back for check-ups After a few times, her condition worsened day by day. We asked her to undergo chemotherapy, but she refused. The last checkup we gave her was in June. According to the report, her cancer cells had spread, and there was no treatment for her. necessary."

Lymphoma!I was very shocked when I heard these three words, because I know that lymph is the immune organ of the body and spreads all over the body. Once cancer cells spread, they are basically waiting to die.

Half an hour later, we, master and apprentice, bid farewell to Dr. Xu and sat in a ramen restaurant.

"Teacher, I'm getting more and more confused now. What do you think is the suspect's motive for killing Jiang Yuzhen? How much hatred can she arouse as a person whose life is about to end?" I sat on my seat, Peeling the garlic cloves, he asked.

"Let's not think about it so much, let's re-survey the scene tomorrow." After speaking, Teacher Li Feng picked up a piece of dried stew and put it in his mouth.

As the sun was setting, our master and apprentice returned to the compound of the technical room and worked out a detailed re-survey plan.According to my idea, Mr. Li Feng divided the scene into two parts, one is the murder scene and the other is the suspected theft scene.The main task of this re-examination is to extract the trace evidence that may be missed on the scene, so we have prepared more sophisticated instruments.

Nine loving mothers

The next morning, when the light was strongest, we rushed to the scene again.After getting dressed, Teacher Li Feng and I went into the warehouse where the body was found.

Squeak, the wooden door was gently pushed open by me.

The scene in front of us shocked both of us, master and apprentice, and the room was full of "breath of life".

"Master, why are there bean sprouts growing in this room? There haven't been any in the past few days!" I pointed to the ground on the north side of the warehouse and shouted at him.

"How can there be bean sprouts, and such a large area?" Teacher Li Feng was also very puzzled, and hurriedly put down the survey box in his hand, and walked forward quickly.

After observing carefully, Mr. Li Feng turned to me and said:

"The growth cycle of bean sprouts is usually one week. It may be that the place was damp before. When we surveyed the site a few days ago, the soybeans were in the development stage and did not sprout, so we didn't notice it."

"The site has been completely sealed off. The warehouse is so dry, and it hasn't rained recently. How could the ground get wet?" I was a little confused.

Teacher Li Feng didn't pay attention to what I said, he moved a bag of soybeans vigorously, and another large piece of bean sprouts appeared in front of me.

"Xiaolong, come, move away all the soybeans on the north wall!" Teacher Li Feng shouted to me excitedly.

"Okay." I geared up and walked forward quickly.A few minutes later, we spread more than a dozen bags of soybeans on the ground in the house.

I wiped off my sweat and said pantingly, "Why are the soybeans on the ground at the base of the north wall damp so much? The ones on the south wall are all fine."

Teacher Li Feng supported his knees with both hands, bent over and panted, swallowed a mouthful of saliva and said to me: "This room is slightly inclined to the north. According to the current situation, there should be a lot of water flowing from the south to the south. north."

"Where does the water come from?" I walked to the south wall and bent down to grab a handful of dry straw from the ground.

"The straw here is very dry." After speaking, I went to the north wall again, grabbed a handful of straw and rubbed them back and forth in my hands.

"Teacher, the stalks here are all wet."

pat pat pat.

crunch.

I stomped hard on the ground with my foot, looking for the dividing line between dry and wet areas.

"Teacher, the water should flow from here!" I stood in the middle of the warehouse.

Teacher Li Feng stared at the place where I was standing strangely, and said to me: "Xiaolong, what did you find?"

I raised my head suddenly, and a log of a beam appeared in front of my eyes. I swallowed hard and said, "This is exactly where the dead man hanged himself! Why is there so much water here?"

"It seems that we have all been counted into it. I am calling the son of the deceased. I believe that the truth will soon be revealed." Teacher Li Feng put his hands in his pockets and looked up at Fang Liang, saying meaningfully.

Jiang Liang has been living with relatives in the same village for the past two days. When he received our call, he quickly ran over.

Before Jiang Liang could get a firm foothold, Teacher Li Feng opened his mouth and asked, "Do you have a refrigerator at home?"

Jiang Liang swallowed a mouthful of saliva and quickly replied: "Yes."

"Where is it?" Teacher Li Feng asked eagerly.

"In the tofu room."

"Quick, take us to have a look." Teacher Li Feng quickly put on the gloves and urged.

Hearing this, Jiang Liang turned around and entered the tofu room on the east side of the main room.He walked to the south corner of the room and lifted a stained wooden board. An old-fashioned cube freezer appeared in front of us. This freezer was exactly the same shape as the refrigerator selling ice cream at the roadside stand.It is placed in the tofu room, and it is really difficult to distinguish it without looking carefully.

"Xiaolong, bring me the fingerprint inspection box, and I'll deal with it." Teacher Li Feng pulled his white cotton gloves, turned to me and said.

Hearing this, I quickly opened the iron toolbox, and boxes of powder were handed to him.Teacher Li Feng glanced at the surface of the refrigerator, took out three kinds of brushes, and after a quick treatment, opened the door of the refrigerator.

Jiang Liang looked into the refrigerator curiously, pointed to a stainless steel pot without a cover at the bottom of the refrigerator, frowned and said, "Hey, why is my tofu soup gone?"

"What is tofu soup?" I looked at him suspiciously and asked.

"We use mountain spring water to make tofu here, and the spring water is rich in minerals. But the reason why our tofu is delicious here is not only the water is good, but another important reason is that its method is better than other places. One more process is required. Because usually the tofu will have a gypsum smell when it is cooked, in order to get rid of this smell, we have to re-boil a pot of clean mountain spring water and blanch the tofu. The blanched spring water is edible, we call it It is tofu soup. When I go to sell tofu in the urban area, I will give customers a spoonful of it for cooking. Since I go to the urban area to sell tofu for a long distance, in order to prevent the tofu soup from bumping and overflowing on the road, I will put it in advance. It is frozen in a steel pot, which is convenient to carry. I have two steel pots, and I took one away when I went to the city a few days ago, and there should be another pot left in the refrigerator." Jiang Liang glanced at the empty space. Steel pan, said to me.

"Xiaolong, take the stainless steel pot away and take it back for inspection." Teacher Li Feng took the pot out of the refrigerator and placed it in front of me.I took it with both hands and carefully wrapped it in a large evidence bag.

"By the way, take out some of the wet straw on the warehouse floor." Teacher Li Feng added.

"Understood." After packing the stainless steel pot, I took orders and walked towards the warehouse.

Jiang Liang looked at the actions of our master and apprentice suspiciously.When Teacher Li Feng saw me coming out of the warehouse, he turned to Jiang Liang and said, "Go into the house now and take an inventory to see how much property is lost at home."

Jiang Liang nodded, turned around and walked into the house.In the time it took to smoke a cigarette, panicked shouts came from inside the house.

"It's over, it's over, all the money in the family is gone." At this moment, Jiang Liang ran out in a panic holding a tin box with a spider web on his head.

"How much?" I asked hastily.

"A total of 6 yuan!" Jiang Liang said to us without tears.

"When was the last time you found out that the money was still there?" Teacher Li Feng asked.

"I don't know, my mother usually holds the money. It's the hard-earned money I've worked so hard to save for several years!" Jiang Liang said heartbroken.

"Where did you find this tin box? I remember that when we surveyed the site, we didn't seem to find this box." I asked standing aside.

"My mother usually puts it in the hole dug under the bed. Only my mother and I know. How did he find this one who paid a thousand dollars?" Jiang Liang gnashed his teeth and shouted.

"Xiaolong, take out the box and go back for inspection." Teacher Li Feng gave me a physical evidence bag and said to me.

I put on gloves, took the tin box from Jiang Liang's hand, packed it carefully, and put a label on it.

After a few 10 minutes, our master and apprentice returned to the building of the technical room.

Teacher Li Feng took out the steel pot with a serious face, sucked out the solution remaining at the bottom of the pot with a straw, and then picked up the wet straw in the warehouse and walked towards the physical and chemical laboratory.

I stood quietly and watched him adjust the instrument on the workbench.An hour later, two photos resembling the trend chart of the stock market appeared on the computer screen of the physical and chemical testing equipment.

Teacher Li Feng clicked the mouse a few times, and the two pictures were completely overlapped.

"The water on the floor of the warehouse is tofu soup?" I exclaimed when I saw the result.

Teacher Li Feng did not answer, but walked into the fingerprint laboratory. It took him less than half an hour to import all the fingerprints on the tin box, steel pot handle and refrigerator door into the computer, and then he concentrated on comparison work.

After a long time, Teacher Li Feng closed the fingerprint comparison page on the computer screen and said to me: "Only the fingerprints of the deceased and Jiang Liang were found on the tin box and the refrigerator door, and I only found the fingerprints of the deceased on the handle of the stainless steel pot."

Hearing this, I have a bad feeling.

"Xiaolong, let's measure the height of the steel pot." Teacher Li Feng got up and said to me.

"Yeah." I nodded and followed him and walked out.

"Teacher, the steel pot has a diameter of 38 cm and a height of 46 cm." I put down the ruler and said a series of numbers.

"Officer, officer!" I had just stopped writing when I heard someone shouting outside the door.

Teacher Li Feng looked out the window and said to me: "Jiang Liang is here! Let's go out and have a look."

"What's the rush?" I stepped forward and asked.

Panting heavily, Jiang Liang took out a crumpled note from his pocket and said to me: "After you guys left, I went into the house again and found this in the hole under the bed."

I took the note and opened it quickly, and there was a sentence written in pencil on the note: "Call this number, 49××866."

Teacher Li Feng took the note from my hand, glanced at Jiang Liang and asked, "Have you dialed this number?"

"No, I didn't dare to call, I sent it to you as soon as I found out." Jiang Liang replied nervously.

"Is this paper your mother's handwriting?" Teacher Li Feng asked Jiang Liang as he handed the note.

Jiang Liang squinted his eyes and took a closer look, then replied uncertainly: "It seems so."

Teacher Li Feng took back the note and said to me: "Go, try calling this number!"

The three of us walked straight into the office, beep beep beep, teacher Li Feng first pressed the "hands-free" button, and then quickly pressed the number on the note on the phone.

"Hi, hello, Atlantic Insurance Company, who do you want?" A lady's voice came from the phone.

Teacher Li Feng was stunned for a moment when he heard the word "insurance company". After a few seconds, he said, "Oh, that's right. I have a relative named Jiang Yuzhen, who is 53 years old. I want to check if she is in your insurance company." What kind of insurance does the company take out?"

"Sorry, this is the client's private information, we can't just disclose it." The other party politely refused.

"Jiang Yuzhen had a special situation, and she entrusted us to make this call." Teacher Li Feng explained patiently.

"Then do you know her ID number?" the other party asked tentatively.

"I know, 3 × 010619 × × 10233432." Jiang Liang put his head in front of the phone and quickly reported a series of numbers.

"Wait a moment, please!" There was a clattering sound from the keyboard on the other side of the phone.

"Hello, I have kept you waiting, she has purchased personal accident insurance in our company."

"How much is her insured amount?" Teacher Li Feng asked on the phone.

"Oh, the insured amount is 6 yuan." The other party paused and replied.

"Who is the beneficiary?" Teacher Li Feng asked again.

"Her son Jiang Liang."

"Okay, I'll trouble you then." Upon hearing this, Teacher Li Feng pressed the on-hook button.

At this moment, Jiang Liang stared at the telephone on the desk in disbelief, unable to say a word.Teacher Li Feng and I looked at each other, because we basically understood the real situation of this case at this time.

"Jiang Liang, so far, we have basically understood the ins and outs of this case! This case is not a murder case at all, it is actually a scene directed and acted by your mother." Teacher Li Feng lit a cigarette and said.

"What?" Jiang Liang looked at us in disbelief.

"The pimple on your mother's neck is not a lipoma at all. In fact, she was diagnosed with lymphoma last year, but she has not been treated. Just in June this year, the cancer had spread, and there was no way to treat it." Li Feng The teacher took out the medical records from the hospital and handed them to him.

Jiang Liang put his hands behind his back and shook his head weakly. Tears flowed down his cheeks and fell on the floor of the office. He didn't want to believe that all this was true.

Teacher Li Feng watched Jiang Liang's actions, put the medical record on the table again, and continued:

"Your mother knew that she was going to die, so she bought a personal accident insurance. When you went to the city to sell tofu, she deliberately wore oversized shoes and turned the things in the house into a mess to create the illusion of being stolen. Then She went to the warehouse again, moved a stool, took out the frozen tofu soup ice cubes from the refrigerator and put them on the bench, and she stepped on the ice cubes to create a hanging scene that seemed impossible for herself. What she did All this is to make our public security bureau think that she was killed, so that you can get a large amount of compensation from the insurance company. Although she was born in a rural area, according to our investigation, she basically described it to you She is a very knowledgeable teacher, so it is reasonable for her to design such a crime scene."

"Mom! Mom!" Hearing this, Jiang Liang could no longer control his emotions, and the entire technical room building was filled with his heart-piercing shouts.

In the early morning of the next day, the body of the deceased was taken back by Jiang Liang. I watched the car with the black and white photos of the deceased drive out of the yard of the technical room, and I was really moved.This case can be successfully concluded, 90.00% rely on trace inspection to find clues.This also made me re-acquainted with this subject that I have despised countless times.

(End of this chapter)