An Audi A6 with a Beijing A license plate, along with a group of minibuses, quietly drove into the courtyard of the Changyang City Criminal Police Detachment.????????????.￠?м??????
Huang Qiangmin got off his A6 first, followed by Jiang Yuan and others who got off the minibus.
To put it bluntly, the comfort level of the A6 during long-distance travel is not as good as that of the modified Coaster. Not only is the comfort of the seats inferior, but also when the Coaster is tired, you can stand up, take two steps, and twist your butt. The posture of twisting the waist is incomparable even if the car is extended countless times.
However, A6 has special meaning to Huang Qiangmin, especially the A6 with Beijing brand, it is like LV presbyopia wearing on Huang Qiangmin.
Even if it's greasy, it's still trendy.
Yu Wenwen greeted Huang Qiangmin, Jiang Yuan and others with a smile, and then said with a smile: "We have worked overtime to complete the trace evidence that Jiang Yuan wanted to do, and we have indeed found something, really. It’s a coincidence, hahahaha—”
"Can you confirm the source of the body?" Jiang Yuan got out of the car and moved his hands and feet, and was quite surprised to hear this.
Yu Wenshu smiled and waved his hand, saying: "That's not a big deal. Ah, I said coincidence because I remembered something. I don't know if you still remember it. The first case we cooperated at that time was the 326 kidnapping and murder. The case was the case of Tan Yong, the man who dug his own basement to imprison people. The first breakthrough at that time was proposed by Jiang Yuan, who used the trace evidence method and found a place to hide the body."
Yu Wenshu clapped his hands with a recalling expression and said, "Yi remember what I said at the time. Jiang Yuan used trace evidence to find a place where the body was hidden. It makes sense!"
"That's really a coincidence!" Jiang Yuan and Huang Qiangmin were stunned and laughed in unison.
They generally remember the case, and the logic and evidence of how to solve the case are all imprinted in their minds. But if you want to say what everyone said when they met, they can also retell the original words exactly. , 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 liked it with his real name.
Jiang Yuan also looked at Yu Wenshu up and down. It has to be said that the feeling of having this kind of skill in the hands of others is really unsettling.
"Our Yuzhi quarrels with my wife and we never lose." Wan Baoming, deputy director of the Changyang Criminal Science and Technology Center, is very technical, and his words make people not sure whether he is complaining or not.
And he obviously knew Yu Wenshu's itch. Yu Zhi even waved his hands with a little pride and said: "I am nothing, I just have a photographic memory of what I read, chatted with people, and said I can remember it 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 kind of photo memory.”
"Do you still have photo memory? Do you remember things like photos?" Liu Wenkai followed, mainly to show his face and make him look familiar.
Yu Wenshu nodded solemnly: "It's not uncommon - when I was studying, some people could just glance at the tables in the book and redraw them on the notebook. It's not possible for people like us. You can read it word by word without hesitation. After reading it, you have to understand it so that you can draw the relationship diagram. "
"So, we took the exam with students like this back then." Wan Baoming held up a handful of Yu Wen's books in a complaining tone.
Yu Wenshu said cheerfully: "We don't take advantage of this kind of exam now. At most, the scores in liberal arts are better. You haven't seen that kind of genius in science. Just look at the geometric diagram and jump out the answer. It's equivalent to, how to say - --"-The answer comes directly to their minds."
"When a person like this quarrels with his wife, he has no advantage." Huang Qiangmin said with a smile.
"The results are all the same. Those who have a photographic memory, those who remember photos, those who are mathematical geniuses——" Yu Wenshu's face was filled with vicissitudes of life: "They all have to sleep on the sofa!"
"If you win the argument, you can also sleep on the sofa?" Liu Wenkai lacked experience in this area.
Yu Wenshu nodded solemnly: "You will understand later. She doesn't have to quarrel. She just pointed out and let you think about where you went wrong."
To be honest, my memory is so good that I can really remember my mistakes!"
Yu Wenshu was filled with emotion. He looked at Liu Wenkai again, frowned and said, "I remember Wenkai is 40 years old. Are you still so inexperienced?"
Like Wu Junhao, Liu Wenkai, who had just been promoted to the post of assistant subject, touched his forehead helplessly and said: "My that--I may be better at coaxing--
"How did you coax him?" Several married men present focused their attention on Liu Wenkai.
Liu Wenkai: "As for me--I didn't often go there before--no, to catch people or something, so I practiced some speaking skills and undercover. When I used to work on the front line, Undercover agents, special contacts, etc. are all meant to trick people——"
"Yes, I remember that the Changyang City Public Security Detachment called you here once before when they conducted cross-regional arrests. You must have been the first to be arrested at that time." Yu Wenshu's memory was awakened, and he quickly began to label Liu Wenkai.
Liu Wenkai quickly modestly said: "Tie 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: "Tell us about our case - Baoming, tell me about it."
Several people were talking and had already entered the office. Yu Wenshu sat down, picked up the tea, and took a few 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 lagging behind.
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 about it for a moment, then smiled and said: "Because we measured more trace evidence points, and measured more compounds, I will directly tell 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 woven with polypropylene and polypropylene-coated flat yarns. The warp and weft densities are They are all higher, so they are better woven bags.”
Wan Baoming: "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——"
Wan Baoming: "In addition, there are some fabric fibers, which should come from the clothes of the deceased, including cashmere products and cotton fabrics. They are all natural fibers and are 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 complicated procedures.
First of all, there is no machine that can stuff trace amounts of physical evidence into it and then produce results - just like other types of DNA testing, poison testing, etc.
Secondly, to detect a kind of trace evidence, the inspector needs to classify it first to see whether it is metal, plastic, paint, rubber, glass, etc. This can be observed under a microscope or with an X-ray machine. , you can also use a trace amount as a solvent. In short, it needs to be subdivided before further testing can be done.
For example, after it is subdivided into fibers, the characteristics of the fibers can be further analyzed. Look at its color, composition, and fiber morphology at the vertical and horizontal interfaces.
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 hemp, it can be ramie, jute, green hemp, hemp, flax ---" -- If it is another kind of fiber 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, the crowd 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 were 6 different woven bags on site. And these woven bags came from three different manufacturers. This is actually not normal.
At least it shows that the murderer did not buy the woven bags at that time, but used the inventory."
"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 someone try again."
The last sentence is purely for Jiang Yuan's sake. Because you have used national-level experts, your professionalism and meticulousness must be at least national-level. Otherwise, if the murderer is caught in the future, it is discovered that there is If something goes wrong, it will be a huge loss of face.
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 by using the skull recovery, but it will take a long time——"
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 is 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 to look at the time of death and 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 according to the time of death. I see that the DNA report has also come out. If the victim is a female, you can zoom in a little bit and look at the province-wide data one week before the death. Is there any female missing person who can compare?”
"No problem." Yu Wenshu realized Jiang Yuan's rare emotional intelligence and felt warmed. Although the plan proposed by Jiang Yuan was simple and could even be said to be a conventional criminal police investigation idea, there was a very core element in it. Where, the relatively accurate time of death must be used as the dividing point.
Thinking about the subsequent investigations, personnel costs and case-handling expenses, all are based on this point. Ordinary forensic doctors do not dare to give too specific time of death, and they will give it very leniently, but then It has lost its meaning.
It was here in Jiangyuan that Yu Wenshu could feel the heat of his youth, that strong feeling of being protected and taken care of, which enveloped him inexplicably.
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