Jiang Yuan followed Wang Lan and took Wang Zhong as his driver, passing by the First People's Hospital and the Second People's Hospital of Qinghe City in that order.
When the case has progressed to this point, it has really become a grind.
Jiang Yuan yawned out of boredom.
Wang Lan was also a little influenced by Jiang Yuan, but she was too embarrassed to yawn openly and expose her teeth, so she covered it with her washed white hands, and soon she was yawning all the time.
Wang Zhong, who was driving, felt like he was being affected. He yawned twice and said quickly: "Forensic Doctor Jiang, this seems to be your first time to participate in the investigation."
"Uh... I guess, I haven't done many cases." Jiang Yuan couldn't remember.
In fact, he has done more cases for both young and old, at least more than Wang Zhong has done over the years combined.
Wang Zhong laughed and said: "Actually, when we were working on cases, we often ran around. The old criminal police said that the cases were caused by people running away, and we broke our legs because of them."
"I've never encountered this kind of thing going on from hospital to hospital." Jiang Yuan shook his head. Every time they went to a hospital, they would go to the imaging department and ask to see their X-rays.
Some hospitals are better and can directly see the completed X-rays, while other hospitals require the medical and political department to fill in various things, and the X-rays they see are also incomplete.
Fortunately, both No. 2 and No. 4 have certain ages and genders. If we zoom in on the former a little, screen for 10 years further, and finally check the list of missing persons, the number of X-rays 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 dentistry alone. For most of the day, I only visited two hospitals.
Fortunately, there are not many hospitals in Qinghe City, so it feels like you can get through them quickly.
The worst part is that if they still can't find matching X-rays after looking at them, the three of them might have to make a trip to Changyang City, where there are many hospitals and the workload will be full.
In this kind of worried and fearful state of mind...
At the next Qianjin District Hospital in Qinghe City, Jiang Yuan unexpectedly saw the X-ray that matched No. 2.
"That's it." After finding the person, Jiang Yuan's mood was surprisingly calm, without the ecstasy or more intense emotions he imagined.
Perhaps it is precisely because of finding it that when this certainty appears, the panic caused by the uncertainty before has all lost its flavor.
"Zhu Jin, male, from Zhujiazhuang... disappeared 6 years ago." Wang Zhong read the hospital report and then searched the intranet.
Because he was temporarily seconded to the task force, Wang Zhong's mobile phone also received permission from the provincial department, and in a short while, all the cases were uncovered.
"This is a farmer from Zhujiazhuang. If he were alive today, he would be in his early 40s. I didn't expect that there would still be middle-aged people willing to farm in the village." Wang Zhong is definitely a young man, and he speaks quite young.
Wang Lan happened to be in his early forties. He directly took Wang Zhong's mobile phone and looked at it. Then he shook his head and said: "Working in the village does not necessarily involve farming. It may be breeding or something. If it is confirmed, I will call and let you know." Shen detachment.”
Jiang Yuan agreed, and while Wang Lan was on the phone, he motioned to Wang Zhong to write a note for the doctor.
The doctor couldn't remember the X-rays from 6 years ago, nor could he remember minor surgeries like humeral fractures.
Despite this, Wang Zhong is still in a good mood.
In this way, there are a total of 3 corpse sources 1, 2, and 5. Even if we have figured out the source of the corpse, it will take an average of 2 days to determine the source of the corpse, which is not too slow.
The remaining No. 3 is expected to be revealed soon, and the next progress of No. 46 will depend on it.
Just as I was thinking about it, I saw Wang Lan coming back happily.
"We don't need to go check on the 4th." Wang Lan said cheerfully: "It's also news at noon, the source of the body has been confirmed."
"How did you find out?" Jiang Yuan was surprised.
"Mitochondrial DNA." Wang Lan said, thanked the doctor, took the two of them out, and then whispered: "Our director went directly to the provincial capital and urged the provincial DNA laboratory to do it. Otherwise, it is estimated that You still have to wait in line 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. Moreover, our director has extended the scope of comparison to the entire province. Fortunately, it has been extended to the entire province, otherwise, the comparison would not be possible..."
The degree of decomposition of the corpse is too deep, and it is very difficult to extract DNA normally. For a corpse that has been abandoned for several years, it is usually extracted from the bone marrow, but the success rate is not high, and it often needs to be done many times before it can be done.
One DNA run takes almost a day. Unless the people in the DNA laboratory are asked to work overtime and don't sleep, they can only run two times a day.
Therefore, making such DNA is very time-consuming.
At present, DNA testing is actually subdivided into three types.
One is the most common autosomal DNA identification, the other is Y chromosome DNA identification, and the third is mitochondrial DNA identification.
Here, the Y chromosome is inherited in male families, and father, son, and grandfather share a set of Y chromosomes.
Mitochondrial DNA is inherited in the maternal family, and grandmothers, mothers, and sisters share a set of mitochondrial DNA.
Y-chromosome DNA testing is now often used to investigate crimes within a group. For example, the murderer of the Silver Case used Y-chromosome testing to identify his uncle and then himself.
The advantage of mitochondrial DNA identification is that mitochondria have strong viability and can often remain active in highly degrading environments, so they can be identified. In the case of wife murder in Hangzhou, the husband reported that his wife was missing, and she ended up in the septic tank of the community. The skin tissue and remaining internal organs were washed out, and then mitochondrial DNA was used to identify it, proving that it belonged to his wife, and the facts of the crime were locked.
The identification methods of DNA analyzers and mass spectrometers are similar, both draw a curve on the paper tape.
If the peaks and troughs of the curve are consistent, it means a match, otherwise it means a mismatch. During this period, the contamination of impurity peaks must also be dealt with.
Depending on 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.
The task force held a meeting.
Liu Jinghui looked very energetic.
After several days of fighting, Comrade Liu Jinghui has occupied the top position of discourse.
This is even more true today. Shen Feihong, the detachment leader of the Qinghe Municipal Bureau, only said a few words before giving up his position to Liu Jinghui.
As a cadre from the provincial department, Liu Jinghui didn't have to do so much foreplay. He started talking roughly and said: "After analysis, we will now print and distribute the situation of several victims into a book and distribute it to everyone..."
Liu Jinghui himself opened the white paper booklet and said: "Here, I would like to emphasize No. 2 and No. 3."
"No. 2, Zhu Jin, male, from Zhujiazhuang. He was 35 years old when he disappeared 6 years ago. He is 1.7 meters tall. The special thing about No. 2 is that he is a home farmer. Zhu Jin rented land from relatives to grow corn, which cost him a total of Forty or fifty acres, in addition, Zhu Jin and his wife raised four sows and made money by giving birth to piglets."
"From the information I know, Zhu Jin gave up working outside because of raising pigs. His daily activities are in a narrow area, mainly in Zhujiazhuang and nearby village and town markets. He rarely goes to the county town."
"However, Zhu Jin went out on a motorcycle on the day he disappeared. The distance extended by the motorcycle must be considered here. In addition, the whereabouts of the motorcycle can also be considered as a clue."
Liu Jinghui broke down the case in detail, like a nightclub veteran, and quickly convinced everyone present.
After introducing a few more details about the situation, Liu Jinghui mentioned No. 3.
"Based on the forensic analysis of Jiang Yuanjiang, we believe that No. 3's occupation requires squatting and bearing weights for a long time. After our screening of the missing people and DNA comparison, it is now found that the deceased No. 3, whose name is My name is Yu Jun, male, 38 years old, from Qinghe City. He disappeared 10 years ago. Before his disappearance, he was a worker at the Zifengshan Coal Mine in Qinghe City..."
There was a buzz of discussion in the conference room.
The disappearance 10 years ago means that the murderer's murder 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 to commit crimes for 10 years, and there is no news at all. It seems that it is impossible to say that there is a mistake, but it seems that it is impossible to say that the public security is excellent.
However, the murderer has spread to several surrounding cities, and several city bureaus have been embarrassed together, so it seems that it is not so broken.
"Next, based on the existing information, we have the following plan..." Liu Jinghui started to make arrangements.
Jiang Yuan also listened carefully.
Although in Jiang Yuan's view, reasoning is very unreliable, if you have enough information and simply make logical deductions, you can still get some useful conclusions.
Liu Jinghui kept arranging manpower to do work similar to verification. The content was as detailed as a two-person team.
Jiang Yuan quickly understood Liu Jinghui's operation.
When the suspect could not be directly identified through the body, Liu Jinghui seemed to want to analyze the area where the murderer was.
This is a bit stupid, but very effective solution.
Because according to current judgments, the murderer needed equipment such as a chainsaw or chain saw to dismember the body, and he has owned such equipment since 10 years ago. The proportion of such people or units is definitely not high.
If the area where the murderer is located can be demarcated, even if the delineated area is very large, it doesn't matter if there are thousands or tens of thousands of households. If hundreds of police officers spread out, there is a high probability that the person will be found.
In fact, this is also the ancestral crime-solving skill of the police. Why don't the police like to solve small cases? Because some small cases need to be solved, and theoretically they have to be solved in this way.
Jiang Yuan listened to Liu Jinghui's arrangements and looked at the victim information in the manual. He then raised his head and saw Liu Jinghui's arms waving in front of the map, and suddenly felt a strong sense of painting.
Although the sketching skill he had acquired was "only" LV2, it gave Jiang Yuan a strong sense of intuitive drawing.
In the middle of the conference table were piles of maps of the region and other items.
Jiang Yuan leaned over and picked up a book, then used the pen he brought with him to draw on the spot.
He painted areas where several of the victims lived.
His lines were drawn very accurately, just like drawing a sketch. In his mind, it was like there were multiple little people running around on a big map.
Mark the places they ran with double shading, and the places they might have run with single-line shading, just like doing a still life sketch.
Soon, most of the map turned black and shadow-like, but between the black and shadow, a long, blank, clean area appeared on the map.
Jiang Yuan was also a little surprised by this result.
If you look carefully, you will see that the blank area is more than ten kilometers long and four to five kilometers wide, lying on the map like a plump white silkworm.
The head and tail of 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.
"Moving?" Jiang Yuan couldn't help but have this idea pop up in his mind.
