civil forensic

Chapter 195 Drawing
sixth day.

Jiang Yuan followed Wang Lan, and took Wang Zhong as a driver by the way, passing by No. 1 People's Hospital and No. [-] People's Hospital in Qinghe City.

The case has progressed to this point, and it has really become a grind.

Jiang Yuan yawned bored.

Wang Lan was also a little influenced by Jiang Yuan, but she was too embarrassed to yawn blatantly and exposed her tooth socket, so she covered it with her washed white hands, and soon she was yawning again and again.

Wang Zhong, who was driving, felt that he was going to be affected. He yawned twice and said hastily, "Jiang Forensic Doctor, this seems to be your first time participating in the investigation."

"Uh...it seems, I haven't done a few cases." Jiang Yuan couldn't remember.

In fact, he has done a lot of cases, at least more cases than Wang Zhong has done over the years combined.

Wang Zhong laughed, and said: "Actually, we used to run around when we were working on cases. The old criminal policemen said that the case came out of the way, and it made us lose our legs."

"I've never encountered this type of hospital-by-hospital grind." Jiang Yuan shook his head.Every time they go to a hospital, they have to go to the imaging department and ask to see their X-rays.

Some hospitals are better, and you can see the whole film directly, while some hospitals require medical and political departments to fill in various things, and the X-rays you see are incomplete.

Fortunately, both No. 2 and No. 4 have a definite age and gender. If the former is slightly enlarged, and then screened for 10 years, and finally check the list of missing persons, the number of X-films obtained will not be too many.

Of course, in order to see the pictures of No. 4's teeth, I might have to go to the dentist alone. After half a day, I only visited two hospitals.

Fortunately, there are not many hospitals in Qinghe City, and it feels like I can finish it soon.

The bad thing was that if they couldn't find a matching X-ray after reading it, the three of them might have to go to Changyang City, where there would be too many hospitals and the workload would be full.

In this kind of worry and fearful state of mind...

In the following Qinghe City Qianjin District Hospital, Jiang Yuan accidentally saw the X-ray that matched No. 2.

"That's all." After finding someone, Jiang Yuan's mood was surprisingly flat, without the ecstasy or more intense emotions as imagined.

Perhaps it was because of the discovery that when this certainty appeared, all the panic caused by the uncertainty before had lost all flavor.

"Zhu Jin. Male. From Zhujiazhuang... who disappeared 6 years ago." Wang Zhong read the hospital report, then turned to search the intranet.

Because of the temporary secondment to the special case team, Wang Zhong's mobile phone was also authorized by the provincial department, and after a while, the case was revealed.

"This is a farmer in Zhujiazhuang. If he lives to this day, he will be in his early 40s. I never thought that there are still middle-aged people who are willing to farm in the village." Wang Zhong is absolutely young, and he speaks quite young.

Wang Lan happened to be in her early forties, so she took Wang Zhong's mobile phone and looked at it, then shook her head and said, "Working in the village doesn't necessarily mean farming, maybe it's farming or something. If it's confirmed, I'll call and let you know Team Shen."

Jiang Yuan agreed, and while Wang Lan was on the phone, he signaled Wang Zhong to make a note for the doctor.

Where did the doctor remember the X-rays from 6 years ago, and the minor surgery such as humerus fracture, he couldn't remember it either.

Even so, Wang Zhong was still in a good mood.

In this way, 1, 2, and 5 have a total of 3 corpse sources. Even if they figure it out, it takes an average of 2 days to determine a corpse source, which is not too slow.

The remaining No. 3 is estimated to be available soon, and 46 depends on the next progress.

Just thinking about it, Wang Lan came back happily.

"We don't need to investigate on the 4th." Wang Lan said cheerfully: "It's also news at noon, the source of the corpse has been confirmed."

"How did you find out?" Jiang Yuan was surprised.

"Mitochondrial DNA." Wang Lan said, thanked the doctor, pulled the two out, and then whispered: "Our director went directly to the provincial capital and urged the DNA laboratory of the provincial department to do it. Otherwise, it is estimated that Still have to queue for a week or two."

"So exaggerated?" Wang Zhong was surprised.

"Only the provincial department can do mitochondrial DNA, and they have a lot of work to do. Moreover, our director has extended the scope of the comparison to the whole province. Fortunately, it has been extended to the whole province, otherwise, the comparison would not be possible..."

The degree of decay of the corpse is too deep, and it is very difficult to extract DNA normally.Such corpses that have been abandoned for several years usually have to be extracted from the bone marrow, but the success rate is not high, and it often takes many times to make it.

It takes almost one day to run DNA once, unless the people in the DNA laboratory are asked to work overtime and do not sleep, they can only run twice a day.

Therefore, doing such DNA is very time-consuming.

For now, DNA identification is actually subdivided into three types.

One is the most common autosomal DNA identification, one is Y chromosome DNA identification, and the third is mitochondrial DNA identification.

Here, the Y chromosome is inherited in the male family, and father, son, and grandfather share a set of Y chromosomes.

Mitochondrial DNA is inherited from the maternal line, and grandmothers, mothers and sisters share a set of mitochondrial DNA.

Y-chromosome DNA identification is now often used to investigate crimes within ethnic groups. For example, the murderer in the Baiyin case used Y-chromosome identification to identify his uncle and then himself.

The advantage of mitochondrial DNA identification is that mitochondria have strong viability and can often maintain activity in a highly degraded environment, thus being identified.In the Hangzhou wife killing case, the husband reported to the police that his wife was missing. In the end, it was in the septic tank of the community that the skin tissue and residual internal organs were washed out, and then mitochondrial DNA was used to prove that it belonged to his wife, and the crime was confirmed.

The identification methods of DNA instruments and mass spectrometers are similar, and both draw a curve on a paper tape.

If the peaks and troughs of the curve are consistent, it is an identification match, otherwise it is a mismatch.During the period, the pollution of miscellaneous peaks must also be dealt with.

According to the strength of the DNA laboratory and the ability of the technicians, the subsequent DNA identification process of these corpses may take several days.

The next day.

Task force meeting.

Liu Jinghui looked radiant.

After several days of contention, Comrade Liu Jinghui has already occupied the upper peak of the right to speak.

This is even more so today.Shen Feihong, the detachment leader of the Qinghe City Bureau, only said a few words before giving up his position to Liu Jinghui.

As a cadre from the provincial department, Liu Jinghui doesn't have to do so much foreplay. He opened the conversation roughly as if he was involved in a one-night stand, and said: "After analysis, we are now printing and distributing the situation of several victims as Booklet, distributed to everyone..."

Liu Jinghui himself opened the white paper booklet and said, "Here, I want to emphasize numbers 2 and 3."

"No. 2, Zhu Jin, male, from Zhujiazhuang, 6 years old when he disappeared six years ago, 35 meters tall. The special thing about No. 1.7 is that he is farming at home. Zhu Jin rented the land of his relatives to grow corn, and a total of four In addition, Zhu Jin and his wife raised 2 sows and made money by giving birth to piglets."

"From what I know, Zhu Jin gave up going out to work because of raising pigs, and his daily activities are limited, mainly in Zhujiazhuang and nearby villages and towns markets, and rarely go to the county town."

"However, on the day Zhu Jin disappeared, he went out on a motorcycle. Here we need to consider the distance the motorcycle has extended. In addition, the whereabouts of the motorcycle can also be considered as a clue."

Liu Jinghui broke down the case in detail, like a veteran of nightclubs, and quickly convinced everyone in the meeting.

After introducing a few more words about the specific situation, Liu Jinghui talked about No. 3 again.

"According to Jiang Yuanjiang's forensic analysis, we believe that No. 3's occupation requires long-term squatting and heavy-bearing. After our screening of missing people and DNA comparison, we now find out that No. 3 deceased His name is Yu Jun, male, 38 years old, from Qinghe City, who disappeared 10 years ago. Before he disappeared, he was a coal mine worker in Zifengshan, Qinghe City..."

In the conference room, there was a sudden buzz of discussion.

Missing 10 years ago means that the murderer's killing time has been advanced by 2 years.

The expressions of several leaders of the Qinghe Municipal Bureau were even more ugly.

There is a murderer who has been lurking and committing crimes for 10 years, and there is no news at all. It seems to be impossible to talk about mistakes, but it seems that there is no way to say that the public security is good.

However, the murderer fled to several surrounding cities, and several city bureaus lost face together, so it didn't look so broken.

"Next, according to the existing information, we have the following plan..." Liu Jinghui arranged accordingly.

Jiang Yuan also listened carefully.

Although in Jiang Yuan's view, reasoning is very unreliable, but if there is enough information, some useful conclusions can still be obtained by simply doing logical deduction.

Liu Jinghui kept arranging manpower, doing work similar to verification.The content is detailed to the level of a two-person team.

Jiang Yuan quickly understood Liu Jinghui's operation.

Without being able to directly locate the suspect through the body, Liu Jinghui seemed to want to analyze the area where the murderer was located.

It's a bit dumb, but very effective solution.

Because according to the current judgment, the murderer needs equipment such as a chainsaw or a chainsaw to dismember the corpse, and, since 10 years ago, he has had such equipment.The proportion of such people or units is definitely not high.

If the area where the murderer is located can be delineated, even if the delineated area is very large, it doesn't matter if there are tens of thousands of households. If hundreds of police officers are scattered, there is a high probability of finding the person.

In fact, this is also the ancestral technique of the police to solve crimes.Why don't the police like to do small cases?Because some small cases need to be solved, theoretically they have to be done in this way.

Jiang Yuan listened to Liu Jinghui's arrangement, looked at the victim's information in the handbook, and then looked up, watching Liu Jinghui's arm waving in front of the map, and suddenly felt a strong sense of painting.

Although the sketching skill he acquired was "only" LV2, it gave Jiang Yuansheng a strong and intuitive sense of drawing.

In the middle of the conference table, there are piles of atlases and other items in the region.

Jiang Yuan leaned over and picked up a book and came back, and started to draw on the spot with the pen he carried with him.

He painted the area where several victims lived.

His lines are very accurate, just like a sketch.And in his mind, it was as if there were multiple villains running around on the big map.

Mark where they ran with double shading, and where they might run with single line shading, like a still life sketch.

Soon, most of the map turned black and shadowed, but between the black and shadows, a long, blank, clean area appeared on the map.

Such a result surprised Jiang Yuan.

Looking carefully, the blank area is more than ten kilometers long and four to five kilometers wide, lying on the map like a fat white silkworm.

The head and tail of the white silkworm are exactly two towns.

The head is Zhangshan Town, more than 20 kilometers away from the reservoir, and the tail is Lichang Town, more than 30 kilometers away from the reservoir.

Zhangshan Town belongs to Qinghe City, and Lichang Town belongs to Jianjiang City.

"Moved?" In Jiang Yuan's mind, this idea couldn't help jumping out.

(End of this chapter)