Chapter 541: Saving Traffic

The meeting ended.

Jiang Yuan followed the captain of the Fourth Brigade, Pang Jidong, and went straight to the evidence room to take the main evidence, which was all the clothes of the four victims.

In addition, the criminal science and technology personnel on that day also took some other evidence from the victims, including some tiny grass leaves or leaves, dirt and fibers in the nails of the victims, lubricants on the victims' lower body and underwear, etc., but there was no conclusive evidence.

Jiang Yuan did not extract this part of the evidence, and took the clothes back to the laboratory.

Compared with the human body itself, pollen stays on textiles longer. In particular, some pollen can stay on some textiles for several months or even longer because of the appropriate size.

In fact, the practical application of pollen research is mostly used in archaeology. A typical example is that archaeologists found pollen of cultivated crops and herbs such as rye, barley, sedge, and Artemisia pollen in textiles from a tomb in the Iron Age, a tomb with well-preserved clothes and hair. These pollens obviously could not have been contaminated during burial, but were old and stored in textiles.

If pollen with a chitin-like polymer shell can be enlarged to the scale of a building, its defensive performance is stronger than that of the strongest human fortress, especially in terms of three-defense performance and the ability to resist natural erosion, which is several orders of magnitude stronger than man-made objects.

Under the stereo microscope of the trace evidence laboratory, the performance of the evidence also proves this point.

There is pollen and spores on every piece of clothing, and the amount is not small.

Without special washing, normal people's clothes should be like this - a life trick derived from this, how to know whether the clothes you bought from Taobao are brand new or returned after being worn by someone else? Spend a few hundred yuan to buy a stereo microscope from Taobao and look at the number of plant pollens in the fabric to find out.

If you read more books and have a richer knowledge reserve, you can also judge the living environment and even the life trajectory of the previous owner by the type of plant pollen in the fabric.

If you are free enough and have a little luck, you may be able to locate the address of the previous owner.

As for the operation of the stereo microscope, it is not difficult. The most common scene of similar models is the workbench of watch repairers and mobile phone repairers, and those who do engraving and antique appraisal also use this type of microscope.

Therefore, it does not require advanced skills to find the ex, just have hands.

"I will check it first, and I will make pollen specimens later, so you prepare." Jiang Yuan used a stereo microscope to look at the pollen in the clothing fibers and clipped them out, while instructing the technicians of the trace evidence laboratory.

A stereo microscope can observe pollen very well, but it is not enough to be used as court evidence.

A stereo microscope can see the complete pollen individual, but it is not very clear when it comes to the hairs, grooves, dings, teeth and the like on the pollen.

At this time, a compound microscope is needed, that is, a microscope with a slide and a light source shining from below. This kind of microscope is used in most school biology laboratories. It can see the cell structure and naturally can see the specific situation of the pollen.

The technicians in the trace evidence laboratory immediately got busy preparing.

The slide of pollen needs additional processing, which takes some time.

Jiang Yuan first counted the larger and easier to identify pollen and made a record.

This is a long process. If it is an ordinary botanist, even a very powerful botanist who can work independently, it is still difficult to be competent for forensic botany after a long period of professional research on pollen.

At the very least, a botanist who has studied a doctorate and worked in the field of pollenology for three to five years and barely reached LV2 will spend several days to make a piece of evidence.

This is like mixing a group of birds that look similar together, giving you a book of bird encyclopedia, and asking you to distinguish their species.

Or, to be more specific, send a bunch of photos of microorganisms, and then give you a book of microorganism encyclopedia, and then identify them.

Ordinary botanists really search with books.

Most people only study a small number of fields that they are familiar with, such as those who specialize in pine trees, or those who specialize in birch forests and associated plants.

After expanding to all fields, the complexity of this work has greatly increased, and the practicality has greatly decreased.

After Jiang Yuan upgraded Forensic Botany LV3 to Forensic Botany LV4 with temporary skills, a very BUG point is that the number of times to look up books has been greatly reduced, and the level that needs to be searched has been decentralized, which can save a lot of time.

...

Another person who saved time was Yi Shihuang, the captain of the second brigade.

Yi Shihuang is a traditional old criminal police. There is nothing to say about this. There are many old criminal police in the criminal police team. They have experienced suffering, believe in suffering, and trust suffering.

They like to talk about wearing out their shoes in order to solve a case. Compared with the frustration of not being promoted, being respected is what they value more.

Therefore, as the captain of the criminal police detachment, Yi Shihuang does not like the task of being assigned to arrest suspects.

Of course, the special case code-named 828 is still very interesting. Any homicide case is a high-level case in the criminal police team. You can't restart it if you want to, and you can investigate it at will.

However, Yi Shihuang felt that he had been underestimated because he did not need to investigate on his own and went directly to arrest a suspect and bring him back for interrogation. This feeling is like classmates having a dinner together, eating one month's salary, and then someone carelessly paid.

Yi Shihuang didn't want to pay, and he didn't feel he needed to pay, but he felt he could still afford it, and felt that this person was too pretentious.

With strange emotions, Yi Shihuang arrived outside the suspect's residence and sent someone to knock on the door.

The suspect is a person who has been released from prison. His home address is clearly registered. When the police knocked on the door, he looked innocent and said with a smile: "What's going on?"

"You've committed a crime, come with us." The police didn't look kindly on him. They showed their ID and wanted to take him away.

Gudong.

There was a voice not far behind the door.

Yi Shihuang frowned and immediately waved.

The police officer at the door pulled the suspect into his arms, held his chest, and whispered in his ear: "Who else is at home?"

The suspect smiled and said: "A friend is staying overnight... please be gentle, my collarbone has been injured..."

The policemen dragged it behind and relaxed it a little.

At this time, Yi Shihuang had followed three other police officers into the room.

In the room, there was another man as thin as a bamboo pole, smiling.

"Are you taking drugs?" Yi Shihuang asked after taking a look at him.

These days, when I see a skinny man, I ask him two questions: Are you sick? Are you quite poor?

If both answers are negative, then you are taking drugs.

Yi Shihuang skipped the first two questions this time. There is absolutely nothing wrong with a skinny man who stays in the house of a criminal suspect who has been released from prison. He first asks about drug addiction and then asks about poverty.

The thin man in the room laughed a few times. He looked at the strong policeman in front of him, then at the window, then at the door, and finally sighed: "Suck some occasionally."

"Capture him." Yi Shihuang didn't even bother to ask. This was definitely someone who had been in the palace for the second time. He knew that he couldn't escape a quick drug test, so he confessed directly.

Once you enter the interrogation room, this kind of person can also pour beans out of a bamboo tube.

A group of police officers rushed in and out, and soon returned to the criminal police detachment of the city bureau.

Send someone special to interrogate and bring out the evidence of bloody fingerprints. The real person who opened the door explained the situation faster than a drug-addicted monkey.

The interrogating police officers kept up their efforts and took the time to get to the bottom of it before getting off work.

When he came out to report to Yi Shihuang, Yi Shihuang was a little confused.

"Even if 828 Eucalyptus is broken?" Yi Shihuang didn't know that what he said had been said by many police officers.

The interrogating policeman expressed emotion: "This guy was a drug addict before, and he was an old acquaintance of the victim. He couldn't borrow the money, so he got emotional and killed the person. Because the relationship between the two parties was established ten years ago. , the previous handlers couldn’t find him.”

"Okay... we will review it tomorrow and I will report to the leader."

Yi Shihuang felt a little drunk, as if his cognitive world had been hit.

Soon, the real sense of impact was conveyed to the leaders of the Luojin Municipal Bureau.

The thought "Did we lose money?" and the thought "Did we be stupid before?" collide with each other and never merge.