I am a super cop

Chapter 87 Detection

Excreta detection is a technical job, which is equivalent to going to the hospital for a physical examination. The doctor will ask for excrement testing for a reason.

Gu Chen is not afraid of police officer Wang's jokes. Anyway, at present, the important clues have not yet been found, and it is a kind of sneak in to go to the technical department with bird droppings and bread crumbs.

By the way, it was time to return the manuscript to the forensic assistant.

It is a bit unreasonable to say that although the observation skills that have just been upgraded to the professional level are very strong, but I have nothing to gain in the residence of Aguda Takasugi.

Of course, after rigorous investigation, the information captured by the professional level observation ability is also complete.

After investigating the entire room, no suspicious points were found, but Gu Chen was the only one who had a soft spot for the dead canaries, as well as the bird droppings and bread crumbs left on the ground.

I always feel that there is a flaw in my observation ability?
Or during the promotion process, there is a deviation in the observation of details, and the original insignificant places are over-interpreted.

But the problem is that after investigating a series of cases, I have also verified the excellence of my various skills one by one. It seems that there is no so-called deviation, and it is even more accurate than the observations of ordinary veteran comrades.

However, Gu Chen doesn't expect that with his previous experience, he can have overconfidence in future cases.

The vast majority of unjust, false and wrongly decided cases often lie in the police's excessive belief in the so-called experience in handling cases in the process of handling cases.

In some unconventional cases, it is often necessary to break the routine and investigate from another perspective, and perhaps find unexpected clues.

Gu Chen isn't fighting with bird droppings now, if it wasn't inconvenient at that time, he would have taken the canary's corpse away with him.

Although this sounds absurd...

Officer Wang drove the car to the city bureau compound, under the building where the technical department is located.

"Gu Chen, I convinced myself to bring you here because I have absolute trust in you." Officer Wang spoke strangely.

"So?" Gu Chen asked.

"You can go up by yourself later, don't say I brought you here, okay?" Officer Wang looked at Gu Chen with a bitter face.

Gu Chen nodded: "I know, then I'll go there first."

Opening the car door, Gu Chen was about to go alone, when Lu Weiwei stopped him: "Junior Brother Gu, I'll go with you."

"Row."

The two left side by side, leaving only Police Officer Wang in the car with a dazed expression.

"It's okay to lose face by one person, but what's the point of two people? Aren't you afraid of being laughed at by comrades in the city bureau?"

Ever since he was going to be on the honor roll, Police Officer Wang suddenly felt that he was also a person who wanted face.

It's fine if the case is blocked, but I'm here with two subordinates to add to the trouble, such a thing... I don't want to have a second time.

Gu Chen and Lu Weiwei took the elevator and went directly to the fifth floor of the building.

This is where the technical department is located. Although there are not many personnel, there are quite a lot of laboratories, and various testing instruments are quite complete.

As soon as he entered, Gu Chen saw the forensic assistant who lent him the manuscript earlier, and he immediately called Senior Brother Wu.

The forensic assistant narrowed his eyes, turned around and said in surprise, "Aren't you that Gu Chen?"

"Yes, Senior Brother Wu."

"What are you doing here?"

"Return your manuscript." Gu Chen handed him the manuscript in his hand.

The forensic assistant was stunned, and looked at him in disbelief: "Gu Chen, you just finished reading it all? It's not so fast, is it?"

In the impression of forensic medical assistants, it is unrealistic to want to master the essence within a few months.

And Gu Chen usually has to go to work, think about it, he should take photos first, and then organize and study when he has time, it should look like this.

"Indeed, I've finished reading it." Gu Chen also said modestly: "Senior Brother Wu recorded it in detail, which has benefited me a lot."

The forensic assistant took the manuscript, checked it carefully, and said casually: "That's fine, I have nothing to do first, so I won't send you off."

"Don't." Lu Weiwei suddenly stopped him: "We are looking for Forensic Doctor Liu, is he there?"

"Yes, it's in the No. [-] testing room, go there by yourself." The forensic assistant looked very busy, and after a few brief explanations, he left first.

Gu Chen and Lu Weiwei found the No. [-] testing room by themselves...

At this moment, Forensic Doctor Liu is writing a report on his desk, and it seems that he has just completed a test.

Gu Chen knocked on the door and walked in: "Liu Fayi, I'm here to trouble you again."

Liu Fayi raised his head and pushed his glasses: "Hey! It's Gu Chen and Weiwei, why are you here?"

"There are a few things I want you to check for help." Gu Chen took out the file bag.

"In a hurry?" Liu Fayi asked with staring eyes.

"Yes, it's very urgent. It's best to take it away after the test." Gu Chen is also impatient. Since he personally sent it to the technical department, he didn't want to make another trip.

"But I still have a report in hand."

"Liu Forensic Doctor, please help me and join the team." Lu Weiwei said hypocritically.

We all know that forensic identification takes time.

It's okay to say that it's not busy, but if it's busy, many test items need to be queued for testing. After all, everyone hopes that the results will be available in the shortest time and the fastest.

Liu Fayi nodded, and said with a smile: "Okay then, since you two sent it over in person, then bring it over. It just so happens that I'm not in a hurry for this report."

"That's great." Gu Chen hurriedly opened the file bag, and handed several packed bird droppings and bread crumbs to Forensic Doctor Liu at the same time.

"You want to test the feces?" Forensic doctor Liu asked.

"This is the feces of a canary. I suspect that this canary may have eaten poisonous substances, so..."

Gu Chen also expressed his guess.

Liu Fayi has partnered with Gu Chen many times, and he quickly understood what he meant.

Although I don't know if there is any necessary connection between this and the case, it will definitely help Gu Chen handle the case.

"Wait a minute." Without further ado, Forensic Doctor Liu took the sample and went to the instrument.

Nowadays, forensic examination of excrement is not as cumbersome as before, but most of the excrement is extracted from people.

However, it is still difficult to extract human DNA, but it may be possible to identify this person's DNA.

The reason why it is difficult to extract is because the feces contain undigested DNA fragments in the food.

The DNA of intestinal microorganisms is essentially the same as the DNA in the exfoliated cells of the host's digestive tract, and it is impossible to separate this person's DNA from other DNA.

But most of what needs to be identified, its owner can be identified from fecal DNA, and identification of DNA is feasible.

There are parts of human DNA that are highly variable regions that vary from person to person and require only the use of a specific gene amplification method.

Also known as PCR, polymerase chain reaction.

Amplify this highly variable region, identify the sequence of this segment, and compare it with a database or a person's DNA to know the corresponding relationship between the feces and the owner.

That is to say, it is not necessary to extract all the DNA, but only need to identify this section of DNA.

In fact, forensic identification is carried out through this method.

The result that Gu Chen needs is actually much simpler than identifying DNA. He only needs to find the connection point from the animal feces.

Forensic doctor Liu's detection speed was a bit fast. After comparing the data values, he told Gu Chen: "I can tell you now that these bread crumbs do contain toxic substances, and there are also feces."

Gu Chen's eyes lit up, this was the result he wanted, it seemed that the previously interrupted threads were suddenly connected again.

"In other words, this canary died after eating this poisonous bread for a long time?"

Forensic Liu nodded: "Yes, it is indeed caused by long-term consumption. I have a test result here, you take it first."

After receiving the report, Gu Chen got up and bowed, "Thank you Fayi Liu, thanks to your help this time."

"It's a trivial matter." Forensic Doctor Liu said with a chuckle.

However, Lu Weiwei on the side looked confused, and she hurriedly asked: "Junior Brother Gu, do you have any new discoveries?"

Gu Chen said mysteriously: "Let's talk in detail when we get in the car later. Didn't Senior Brother Wang want me to find clues to report? It just so happens that I have evidence now."

　Thanks to the book friend [Mengluo Hongchen] for the 1000 book coins, please collect and recommend tickets.

　　


(End of this chapter)