Chapter 962: Division (Asking for Monthly Votes)

An Audi A6 with a Beijing A license plate drove into the courtyard of the Changyang City Criminal Police Detachment with a row of minibuses in a low-key manner.

Huang Qiangmin got off his A6 first, followed by Jiang Yuan and others who got off the minibus.

To be honest, the comfort level of the A6 during long-distance travel is not as good as that of the modified Coaster. Not only is the seat less comfortable, but when you get tired of sitting in the Coaster, you can stand up and walk a few steps, twist your buttocks and waist, which is something that even a sedan that is lengthened countless times cannot compare to.

However, the A6 has a special meaning to Huang Qiangmin, especially the A6 with a Beijing license plate, which is like the LV old flower on Huang Qiangmin,

even if it is greasy, it is still trendy.

Yu Wenshu greeted Huang Qiangmin, Jiang Yuan and others with a smile, and then said with a smile: "We have already worked overtime to complete the trace evidence that Jiang Yuan wanted to do. We did find something. It was really a coincidence, hahahaha-"

"Can you determine the source of the corpse?" Jiang Yuan got out of the car and stretched his hands and feet. He was quite surprised to hear this.

Yu Wenshu smiled and waved his hands, saying: "That's not the case. Ah, I said coincidence because I remembered something. I don't know if you still remember that the first case we cooperated on at that time, the 326 kidnapping and murder case, was the Tan Yong case, the one who dug a basement to imprison people. The first breakthrough at that time was proposed by Jiang Yuan, using the trace evidence method and finding a place to hide the corpse."

Yu Wenshu clapped his hands and put on a reminiscing expression, saying: "Yi remember what I said at the time, Jiang Yuan used trace evidence to find a place to hide the corpse, which makes sense!"

"That's really a coincidence!" Jiang Yuan and Huang Qiangmin were stunned and laughed twice in coordination.

They all roughly remember the case, the logic and evidence of how to solve the case, which are all things imprinted in their minds, but if you ask what they said when they met, they can still repeat the original words one by one. I have to say that it is really a bit scary to listen to Yu Wenshu's retelling face to face.

"This is the ability of photographic memory." Huang Qiangmin praised it with his real name.

Jiang Yuan also looked up and down at Yu Wenshu. It must be said that the feeling of having this skill in the hands of others is really uneasy.

"We Yuzhi have never lost in a quarrel with my wife." Wan Baoming, deputy director of Changyang Criminal Science and Technology Center, is very technical, and his words make people unsure whether he is complaining.

And he obviously knows Yu Wenshu's itch. Yu Zhi even waved his hand with a little bit of pride, saying: "My memory is nothing, I just have a photographic memory, and I remember what I said when I chat with people more clearly, but if you ask me about the scene at that time, I can't remember it clearly, it's not as good as the memory of photos."

"There are also memory of photos? Just remember things like photos?" Liu Wenkai followed, mainly to show his face and make himself familiar.

Yu Wenshu nodded seriously: "It's not uncommon---When I was in school, some people could just look at the tables in the book and quickly draw them on the notebook. People like us can't do that. We can only read word by word, and understand them after reading, so that we can draw the relationship diagram."

"So, when we took the exam, we took the exam with such students." Wan Baoming held Yu Wenshu in a complaining tone.

Yu Wenshu said cheerfully: "We don't have any advantage in this kind of exam now. At most, we have better scores in liberal arts. Haven't you seen those geniuses in science who can get the answer directly after looking at a geometric diagram? It's equivalent to, how to say---"-they can get the answer directly in their minds. "

"When people like this quarrel with their wives, they have no advantage." Huang Qiangmin said with a smile.

"The result is the same. Those who have a photographic memory, those who have a photo memory, and those who are mathematical geniuses---" Yu Wenshu's face is full of vicissitudes: "All of them have to sleep on the sofa!"

"Even if you win the quarrel, you still have to sleep on the sofa?" Liu Wenkai lacks experience in this area.

Yu Wenshu nodded seriously: "You will understand in the future. She can avoid quarreling, just point with her finger and let you think about where you made a mistake.

To be honest, her memory is too good, and she can really remember the mistakes!"

Yu Wenshu was full of emotion, and looked at Liu Wenkai again, frowned, and said: "Wenkai is 40 years old as far as I remember. Still so inexperienced? ”

Liu Wenkai, who was promoted to deputy section chief like Wu Junhao, touched his forehead helplessly and said: "My --- I may be better at coaxing --

"How do you coax?" Several married men present focused their eyes on Liu Wenkai.

Liu Wenkai: "My ---- I used to go there often ---- No, to catch people, so I practiced some words and things, and I was also an undercover. When I was working on the front line, I was an undercover, contacting special agents, etc., and I had to coax people --"

"Yes, I remember that the Changyang City Security Detachment conducted cross-regional arrests and called you over once. You were the first one to be arrested at that time." Yu Wenshu's memory was awakened, and he quickly began to label Liu Wenkai.

Liu Wenkai quickly said modestly: "We are tied for first place. Men dressed as women don't count."

Yu Wenshu's memory was awakened for the second time, and he said a little uncomfortably: "Let's talk about our case - Baoming, tell me about it."

As they talked, they entered the office. Yu Wenshu sat down, picked up the tea, and drank two sips.

Wan Baoming is a criminal expert in Changyang City. However, he became famous 20 years ago. The technological iterations in these years cannot be said to be backward.

It can only be said that I have not kept up, but it is possible to have a rough understanding, and it is no problem to have an overview of the whole area, so I can only be the leader of the criminal department, and I can no longer be a technician.

Wanbao Mingqing coughed twice, took out a report from his arms, thought for a moment, then smiled and said: "Because we measured more trace evidence points and measured more compounds, I will directly state the conclusion. Right. The fibrous tissue taken from the body parts has the same fiber structure as the woven bags found at the scene. They are both multi-layer bags made of polypropylene and polypropylene-coated flat yarns. The warp and weft densities are They are both relatively high and are relatively good woven bags. "

Wanbao Ming: "The special thing is that we have determined that the murderer used woven bags from three different manufacturers, one is green and two are blue——"

Wanbao Ming: "In addition, there are some fabric fibers, which should come from the deceased's clothes during his lifetime, including cashmere products and cotton fabrics, which are all natural fibers and relatively complicated. It is difficult to say whether the manufacturer can be confirmed in the end."

The examination of trace physical evidence is relatively complex, or in other words, it is composed of a set of complex procedures.

First of all, there is no machine that can stuff trace amounts of evidence into it and then produce the results - just like other types of DNA tests, poison tests, etc.

Secondly, to detect a trace amount of physical evidence, inspectors need to classify it first to see if it is metal, plastic, paint, rubber, glass, etc. You can observe it under a microscope, you can use an

For example, after it is subdivided into fibers, the characteristics of the fibers can be further analyzed. Look at its color, composition, and fiber shape at the vertical and horizontal interfaces,

Polarized light characteristics, fluorescence characteristics, infrared spectrum, Raman spectrum, etc...—"

After doing this, it’s time to classify. First, classify whether it is natural or chemical fiber, and then look at whether it is natural or chemical fiber.

If it is a natural fiber, it can be cotton, linen, silk wool, etc. --- If it is a kind of linen, it can be ramie, jute, green hemp, hemp, flax ---" -- If it is another It’s a kind of marijuana. Hey, then we’re back to the marijuana course and let’s see what kind of marijuana it is.

For the police, determining the type of fiber is far from the end, because what the fiber is used for still needs to be guessed and confirmed. If they ultimately want to use it to determine the source of the corpse, they need to go from fiber to material. Explore step by step from material to manufacturer, from manufacturer to consumer.

After walking around for a while, everyone became thinner.

That is to say, there are woven bags on site and can be compared directly, which is relatively simple.

But if you want to finally find consumers through clothes, the difficulty is too high.

Jiang Yuan listened to Wan Baoming's introduction and reached out for a few more reports to read. After a while, he said again: "To put it simply, it is a fiber that is suspected to come from clothing. It is difficult to determine the source - as for the woven bag , what do you think?

Wan Baoming took a sip of tea and said: "The fiber types in the trace evidence can all correspond to the woven bags found at the scene. At present,

There are 6 different woven bags on site. These woven bags come from three different manufacturers, which is actually not normal.

At least it shows that the murderer did not buy the woven bags at that time, but used the stock. "

"So the murderer or the victim's work, or the first scene, used woven bags?" Jiang Yuan translated Wan Baoming's words.

“At present, it seems that it is possible————.

"But the scope is still a bit broad. The body parts must all belong to the same person, right?"

"Two of the corpses were so badly decomposed that no DNA was obtained. The others have been confirmed to be from the same person." Wan Baoming paused.

Then he said: "I'll go back and let others try again."

The latter sentence was purely for Jiang Yuan's sake. Because you are using national-level experts, your professionalism and meticulousness must be at least national-level. Otherwise, if the murderer is caught in the future and there are loopholes found here, it will be very embarrassing.

Jiang Yuan: "We can try more. We will search the surrounding area again. If the head can be found, this case can at least be solved with skull restoration, but it will take a bit long -"

Yu Wenshu responded: "We are already expanding the search area, and the police dog brigade is also coming to support us."

"In this case, there's not much we can do." Jiang Yuan said difficult words, but his tone and expression were still positive. He turned around and said: "Well, let me judge a relatively accurate death." Time, let’s go in two steps.”

"good."

"One is based on the time of death, let's look for nearby surveillance cameras to see if there is any harvest. It would be best if the other party used a covered truck or a tricycle to transport the body."

Yu Wenshu smiled: "Don't tell me, there are quite a few similar cases."

Jiang Yuan smiled with his remaining emotional intelligence and continued: "Monitor and collect as much as possible. If you have any questions, I can do further optimization here."

Yu Wenshu: "Okay!"

Jiang Yuan: "Second, let's scan the missing persons based on the time of death. I see that the DNA report has also come out. If the victim is a female, we can expand the scope a little bit and see if there are any female missing persons in the province who can match the time of death."

"No problem." Yu Wenshu felt Jiang Yuan's rare emotional intelligence and felt warmed. Because although the plan proposed by Jiang Yuan is simple, it can even be said to be a conventional criminal police investigation idea, but there is a very core point in it, which is to use a relatively accurate time of death as the dividing point.

Think about so many subsequent investigations, personnel costs and case handling expenses, which must be based on this point. Ordinary forensic doctors dare not give too specific time of death. If they do, they will give a very wide time of death, but that loses its meaning.

It was here with Jiang Yuan that Yu Wenshu could feel the heat of his youth, the strong feeling of being protected and cared for, which inexplicably enveloped him.

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