conspiracy crime 2

Chapter 4 The Best Ending (1)
criminal investigation dossier
(positive volume)
Case name: Qingyang Elementary School Murder Case

Case Number: A53890213020121019
Name of suspect: XXX
Case filing time: 2012.10.19
Closing time: 2012.11.5
Filing unit: Qingyang City Public Security Bureau
1
An autumn rain last night wet the cement playground of Qingyang Primary School.

When the children finished their morning exercises and heard the command to disband from the radio, they suddenly ran away like a flock of sheep out of the pen, stepping on water stains, and filled the playground with joy.

From the end of morning exercises to the first class, there is a 10-minute break in between.

Jiang Yiming, the language teacher and head teacher of Class 3, Grade [-], supervised the students in the class to finish their morning exercises, chatted with Teacher Song from the next class, and then walked to the classroom of his own class.

In the classroom of Class 3 ([-]), several girls who came back from morning exercises were immersed in their homework.

One of them, a pretty-looking girl with short hair, was tutoring other students while doing homework by herself.This girl is named Lin Yan, who is the representative of the Chinese class in the class and one of Teacher Jiang's favorite students. She is often called to the office to tutor her alone.

Seeing this scene, Jiang Yiming smiled gratifiedly.

He picked up the magnetized cup on the podium and took a sip of tea.

Jiang Yiming has recently suffered from "autumn thirst". Every morning, he would carry a cup of tea into the classroom for self-study, put the cup on the podium during morning exercises, and drink it after class.

He unscrewed the teacup, and there was only half a glass of water left in the cup.

He drank his tea while waiting for the bell to ring for class.

A few minutes later, the class bell rang on time, and the children who were playing around on the playground ran back to their classrooms, and the huge campus suddenly fell silent.

Today is Thursday, and the first and second classes in the morning of class five (3) are Jiang Yiming's composition class.

Jiang Yiming planned to assign composition topics to students in the first class and explain the writing requirements as usual, and let students complete the composition independently in the second class.

He wrote the topic of the composition to be written this time on the blackboard. He first talked about a few writing requirements and precautions, and then took out an example essay and asked Lin Yan to read it aloud in class. After looking at the specific writing requirements, before I knew it, the get out of class bell rang.

Teacher Jiang announced that get out of class was over, and several naughty boys rushed out of the classroom with a dirty football, while the quiet girls mostly stayed in the classroom to read.

Jiang Yiming picked up the teacup casually, but found that the cup was already dry.

Shaking his head, he had no choice but to walk out of the classroom and go to the office to add water.The classroom of class five (3) is at the east end of the corridor, and the office of the fifth grade teacher is at the west end of the corridor. If I want to pour a cup of tea, I just have to pass through the entire corridor.

In the school, teachers of each grade share a large office.

In the office, several teachers who had no classes were chatting.

Jiang Yiming picked up the thermos bottle on his desk and poured a cup full of hot water into the magnetized cup. The jasmine tea at the bottom of the cup was constantly rolling in the cup due to the scalding hot water, and the tea fragrance overflowed.

Jingling, the bell for the second class rang soon.

Jiang Yiming walked quickly into the classroom with a teacup in hand, and the students had already consciously took out their composition papers and started writing.

Jiang Yiming walked around the classroom, then returned to the podium, and sat down to correct homework.

He had just corrected a few Chinese homework, and felt very thirsty again. He unscrewed the lid of the cup, took a few sips of the hot tea, and then continued to correct the homework.Just like this, I corrected my homework while drinking tea.

About ten minutes later, the student who was immersed in writing the composition suddenly heard the sound of "boom". When he looked up, he saw that Mr. Jiang had fallen to the ground at some point, his whole body twitching and foaming at the mouth. , and never moved again.

The 45 students in the class were stunned. It took some time before they heard someone shouting, "Go and call the principal."

A boy sitting by the door stumbled and ran out in a hurry.

2
Several police cars soon drove into the campus of Qingyang Primary School, led by Fan Zetian, head of the Criminal Investigation Brigade of the Municipal Public Security Bureau.

The old principal who called the police was already waiting on the playground.

The old principal, who was still in shock, told the police that it was Mr. Jiang Yiming, the head teacher of No. 3 ([-]), who had the accident.

While briefly explaining what happened, he led the police into the classroom of Class 3 ([-]).

The children in Class 3 (40) had already been assigned to attend classes elsewhere, and the classroom was empty. A middle-aged man in his [-]s was leaning over the podium with a lot of white foam on his mouth.

The old principal said that he was Teacher Jiang Yiming.

Fan Zetian nodded, and while putting on his white gloves, he signaled forensic doctor Lao Qin to step forward and take a look.

Lao Qin stepped forward, picked up the white foam at the corner of Jiang Yiming's mouth with his gloved fingers, put it in front of his nose and smelled it, his face changed, and he said it was fluoroacetamide poisoning.

Fan Zetian was taken aback. He knew that fluoroacetamide was a highly poisonous rat poison. The production, sale and use of this rat poison had been banned as early as the 70s.

Lao Qin took out a small flashlight, opened Jiang Yiming's eyelids, looked at his pupils, and suddenly said, "He's not dead yet."

Fan Zetian was taken aback, and quickly asked, "Can you still save him?"

Lao Qin said: "I guess it's a bit difficult, and I'm already in a deep coma."

Fan Zetian hurriedly asked someone to call 120.

A few minutes later, a 120 ambulance drove into the campus, and two medical staff carried him into the ambulance while giving first aid to Jiang Yiming.

Fan Zetian told policeman Xiao Liu to follow the ambulance to the hospital, and if Jiang Yiming woke up, call him immediately.

The police immediately conducted a close inspection of the crime scene.

The trace inspection personnel detected the fluoroacetamide component in the tea in the magnetized cup on the podium.

After being identified by the old principal, this is the teacup used by Jiang Yiming.

Forensic doctor Lao Qin said: "Jiang Yiming must have drunk the water in this cup, so he was poisoned."

Fan Zetian frowned and said, "The production and sale of this poisonous rat poison has long been banned by the country. If you don't buy and use it deliberately, it is not easy to get it into the tea by mistake, so now the possibility of accidental poisoning can basically be ruled out."

Old Qin asked: "Could it be suicide?"

The old principal next to him shook his head and said, "This is unlikely. Teacher Jiang is not only superb in business, but also ranks first in every exam in the class he leads, and he is humble and low-key, and he is also very popular in school. , the school is preparing to promote him to be the dean of teaching affairs, and I haven't seen any abnormalities in his emotions recently, so I don't think he is a person who wants to commit suicide by taking poison."

Fan Zetian added: "As a competent teacher, even if he really wanted to commit suicide, under normal circumstances, he would not choose to end his life in front of the whole class."

Lao Qin said: "Since accidental poisoning and suicide by taking poison have been ruled out, the only thing left is artificial poisoning, poisoning and killing people."

The old headmaster looked like a good man, and said: "It's not very possible. Poisoning and killing people must have a big hatred, but Mr. Jiang has always been kind to others, and I haven't heard of him having any deep hatred with others. Fortunately, Jiang The teacher has not died because of this, when he wakes up, everything will be clear."

Fan Zetian took out his mobile phone and called Xiao Liu, who accompanied Jiang Yiming to the hospital, and asked him how Jiang Yiming was doing in the hospital.

Xiao Liu said: "The hospital has just carried out emergency rescue on him, but he is still in a severe coma and has not woken up. Now he has been transferred to the intensive care unit for treatment."

Fan Zetian asked, "Does the doctor say he can still wake up?"

Xiao Liu said: "This is hard to say. The doctor said that the probability of waking up is not high, unless a miracle happens."

Seeing that Fan Zetian hung up the phone, Lao Qin said sympathetically, "If it's a man-made poisoning, it's a serious criminal case. It seems that Captain Fan is busy again."

Next, the police focused on the teacup and launched a detailed investigation into Jiang Yiming's whereabouts today.

This morning, at about 7 o'clock, Jiang Yiming left the dormitory, took a water glass, and walked into the classroom of his class.

From 7:7 to 40:[-], it was breakfast and morning reading time, Jiang Yiming never left the classroom.

From 7:40 to 7:50, it was morning exercise time, and all the students in the school lined up to do exercises on the playground. Jiang Yiming left the water cup on the podium and supervised the morning exercise of his class on the playground.There was no one in the classroom during this time.

In order to prevent students from accidents, the school installed surveillance cameras in the corridors and other places. According to the surveillance video, no one entered the classroom of class five (3) during morning exercises.

The morning exercises ended at 7:50. Because there were a few extracurricular exercises that were not finished, Lin Yan, the representative of the Chinese class, and six other girls ran back to the classroom to do their homework immediately.

A few minutes later, Jiang Yiming returned to the classroom.

The first class starts at 8:8 and ends at 40:[-].

At this time, Jiang Yiming announced that there was no water in his cup, so he walked out of the classroom and went to the teacher's office at the other end of the corridor to fill up water.

At 8:50, he walked into the classroom for the second class with a teacup full of water, and at around 9:[-], he fell to the ground.

Based on the content of rat poison in the tea, forensic doctor Lao Qin roughly infers that Jiang Yiming will have a poisoning reaction about 10 minutes after drinking the poisoned tea.

According to the description of the students in Class 3 (10), Jiang Yiming was normal after drinking the first glass of water in the first class, and fell to the ground about [-] minutes after drinking the second glass of water in the second class.

Lao Qin judged that each glass of water should be clean, and rat poison should be poured into the second glass of water.

This kind of rat poison is extremely poisonous, and it is known as "one step down" among the people. Because it is odorless and tasteless, and it is easily soluble in water, even if the poison is put into tea, it is difficult for ordinary people to detect it.

Fan Zetian said: "If we can confirm that the poison was put in the second glass of water, then the scope of our investigation will be narrowed down a lot. As long as we concentrate on investigating Jiang Yiming's class after the first get out of class, he will be in the second class. The process of him leaving the classroom to refill water in the office and then returning to the classroom within 10 minutes is enough, because the murderer has the opportunity to poison only during this time period."

3
According to the police investigation, when Jiang Yiming entered the office to add water, there were five teachers in the office, four of them were male teachers who were teachers in four classes of the fifth grade, they worked in the same room as Jiang Yiming, and another young female teacher was The first-grade mathematics teacher came to visit because her boyfriend was in this office.

According to the memories of these teachers, after Jiang Yiming walked into the office, he first greeted the teachers, then put the teacup on his desk, unscrewed the lid with one hand, picked up the hot water bottle with the other hand, poured it into the cup Poured a glass of water.Because it was too full, some water was spilled on the table.

At that time, a male teacher laughed at him, saying that he patronized the beautiful teacher who came to see him, and he didn't even know he spilled boiling water.

Jiang Yiming explained with a smile that he has recently suffered from "autumn thirst" and always needs to drink water, so he wants to pour more water into the cup, so as not to run over to pour water after drinking so quickly.

The teachers said that everyone was at their desks at that time, and the female teacher was sitting next to her boyfriend. No one approached Mr. Jiang, let alone touched his water glass, while pouring water.

The police tested the thermos bottle on Jiang Yiming's desk, the water in it was clean, and no fluoroacetamide was detected.

The several fingerprints extracted by the trace inspectors on the hot water bottle were all left by Jiang Yiming himself.

From the time Jiang Yiming came in to pour water until the police came to investigate, there were at least four or five teachers working in this office at the same time. The traces of poisoning were cleaned up without leaving any fingerprints, and the teacher in the office did not find out. This possibility is unlikely.

Therefore, the possibility of the murderer poisoning the hot water bottle was basically ruled out, so there was only one possibility left, the murderer directly poisoning Jiang Yiming's teacup.

On Jiang Yiming's teacup, apart from his own fingerprints, the police also found two other fingerprints on it, but because Jiang Yiming twisted the cap to drink more often, his own fingerprints had already covered these two fingerprints, and further evidence could not be obtained.But what is certain is that the murderer unscrewed the cup lid and threw the poison into the water cup.

Fan Zetian asked several other teachers, but did not collect any useful clues. At this moment, the female investigator Wen Li suddenly came to him and called him: "Captain Fan, we found some clues from the surveillance video in the corridor, come here take a look."

Fan Zetian immediately followed her to the school security room, where all the surveillance videos in the school were displayed on a monitor here.

Wen Li showed Fan Zetian the surveillance video of the corridor outside Class 3 ([-]) before and after the incident this morning.

According to the video, at about 8:56 this morning, Jiang Yiming finished filling water and walked out of the office with a teacup.

When he walked to the middle of the corridor, a woman in a red coat suddenly appeared in the camera, blocking his way.

Judging from the body movements of the woman in red, the two seemed to be arguing in a low voice.

It's a pity that the woman in red kept her back to the camera, and she could only roughly see that she was a middle-aged woman with short hair, but her appearance was not clear.About 1 minute later, the woman walked out of the surveillance camera quickly. It was the end of get out of class time, and the corridor was full of noisy students, and no one paid attention to the woman in red.

After the woman in red left, she did not enter the surveillance camera again.

Jiang Yiming continued to walk forward, and finally entered the classroom of his own class, and did not meet anyone else during the period.

Wen Li said: "This woman can be said to be the only and most important object of suspicion. After Jiang Yiming added water, he only had close contact with her. Only she had the opportunity to sneak in while Jiang Yiming was not paying attention. Throw the prepared poison into the water cup. Unfortunately, the video is not clear, and we cannot find any more clues about her."

Fan Zetian said, "Let's ask the old principal."

He called the old principal to the security room and asked him if he knew the woman in red in the video.

The old headmaster took a look and said he knew her. Her name is Xu Tielan and she is Jiang Yiming's wife.

Fan Zetian was a little surprised, so he glanced at him and asked, "You can recognize her just by glancing at her back like this? Are you sure you're not mistaken?"

The old headmaster chuckled and said, "Don't look at my age, but my eyesight is still good. Besides, Mr. Jiang and Mrs. Jiang and his wife are both acquaintances. Although I just look at her back, I can recognize her as Xu Tielan."

Fan Zetian asked: "As far as you know, what is the relationship between their husband and wife?"

The old principal sighed and said: "It is said that Mr. Jiang just had an accident, and he is still lying in the hospital. I shouldn't talk about him behind his back, but the relationship between their husband and wife is really not very good. Mr. Jiang moved to the school more than a year ago. I live in the dormitory, and I rarely go home.”

Wen Li asked, "Why is this happening?"

The old principal said: "Xu Tielan opened a clothing store outside, and she usually contacts a lot of people. Some teachers in our school once saw her walking down the street holding hands with other men."

Only then did Wen Li understand, and said, "You mean, Xu Tielan has another man outside, Teacher Jiang is so angry, so he just moved to live in the school, right?"

The old principal said: "That's what it means. Teacher Jiang is an honest man, and he has a daughter in high school at home. He probably doesn't want the divorce to affect his daughter's studies, but he can't tolerate his wife looking for other men under his nose, so I had no choice but to move out and live out of sight.”

Fan Zetian pointed to the video and asked, "Then do you know why Xu Tielan came to school today to find Jiang Yiming?"

"I don't know that," said the old principal.

Fan Zetian thought for a while and asked, "Do you think it is possible? Xu Tielan wanted a divorce wholeheartedly, but Jiang Yiming has been refusing to sign the divorce agreement for his daughter, or for the man's face, or for other reasons. Xu Tielan came to the school this time because of this matter. Seeing that he still refused to agree to the divorce, she was furious and murderous, so she quietly put the rat poison prepared in advance into Jiang Yiming's teacup."

The old headmaster shook his head and said: "I dare not say this. People nowadays, my old man is getting more and more incomprehensible. If you suspect Xu Tielan, just go to her directly. Her clothing store is called Lanlan Clothing Store , at the corner of Wenhua Street, easy to find.”

After he finished speaking, he sighed and left without looking back.

4
According to the clues provided by the old principal, Fan Zetian took the policewoman Wen Li and soon found the Lanlan clothing store on Wenhua Street.

The clothing store has a small front, filled with colorful fashions, and the business seems a bit deserted. A middle-aged short-haired woman in a red coat is behind the counter pressing her head on the computer.

Fan Zetian recognized at a glance that this woman was the woman in red who had quarreled with Jiang Yiming in the surveillance video.

He walked into the clothing store and coughed hard. The woman in red thought it was a customer coming, but when she looked up, she saw two uniformed policemen walking in.

Fan Zetian took out his police officer ID and showed it to her, and said, "We are from the Municipal Public Security Bureau. Are you Jiang Yiming's wife, Xu Tielan?"

The woman in red nodded and said, "Yes, I am Xu Tielan, may I ask you..."

Fan Zetian asked: "Your husband had an accident at school, do you know?"

Xu Tielan said: "I know, the school has notified me."

Wen Li couldn't help but said, "Then you still have the mind to sit here and press the calculator?"

Xu Tielan sighed and said, "I've already gone to the hospital to see him. The doctor said that I'm afraid he won't wake up for a while, and the store is unattended, so I had to come back first."

Fan Zetian asked: "This morning, before Jiang Yiming's accident, you went to school to look for him, didn't you?"

Xu Tielan said yes.

Fan Zetian said: "It seems that you guys are still arguing, can you tell me why?"

Xu Tielan said: "We just quarreled over some family matters."

Wen Li said: "I don't think it's as simple as just arguing a few words, right? During the quarrel, you took advantage of his inattention, lifted the lid of the teacup, and threw the prepared rat poison into his teacup, right? "

(End of this chapter)