Chapter 195: Drawing

The sixth day.

Jiang Yuan followed Wang Chuan, and by the way, brought Wang Zhong as a driver, grinding past the Qinghe City First People's Hospital and the Second People's Hospital in order.

The case has progressed to this point, and it has really become a matter of grinding.

Jiang Yuan yawned boredly.

Wang Chuan was also a bit affected by Jiang Yuan, but she was too embarrassed to yawn and expose her tooth sockets openly, so she covered it with her washed-white hands, and soon she was yawning repeatedly.

Wang Zhong, who was driving, felt like he was going to be affected. He yawned twice and said hurriedly, "Wu Wu Fa Yi Jiang, this seems to be the first time you've participated in an investigation."

"Uh... seems so. I haven't done many cases either." Jiang Yuan couldn't quite remember.

He had actually done quite a few cases, at least more than all the cases Wang Zhong had done over the years combined.

Wang Zhong laughed and said, "Actually, when we did cases before, we often ran around. Old criminal investigators all say that cases are run out, and they made us run until our legs broke."

"I've really never encountered this kind of grinding hospital by hospital." Jiang Yuan shook his head. Every time they arrived at a hospital, they had to find the radiology department or something, and ask to see their X-rays.

Some hospitals were better and could see the films directly. Some hospitals required the medical administration department or something to fill out various things, and the X-rays they saw were incomplete.

Fortunately, No. 2 and No. 4 had determined age and gender. By slightly enlarging the former and then filtering back 10 years, and finally checking the list of missing persons, the number of X-rays obtained would not be too many.

Of course, in order to see the dental pictures of No. 4, it might be necessary to run to the dental department or something separately. After half a day, they only saw two hospitals.

Fortunately, there were not many hospitals in Qinghe City, and it felt like they could be finished soon.

The bad thing was that if they finished looking and couldn't find a matching X-ray, the three of them might have to run to Changyang City. There were many hospitals there, and the workload would be full.

In this state of mind of being a bit worried and a bit afraid...

At the next Qinghe City Qianjin District Hospital, Jiang Yuan unexpectedly saw an X-ray consistent with No. 2.

"This is it." Finding the person, Jiang Yuan's mood was surprisingly flat, without the wild joy or more intense emotions he had imagined.

Perhaps it was precisely because it was found. Once this certainty appeared, the panic caused by uncertainty previously all lost its taste.

"Zhu Jin. Male. From Zhujiazhuang... went missing 6 years ago." Wang Zhong looked at the hospital's report and then flipped over to search the internal network.

Because of the temporary secondment to the task force, Wang Zhong's mobile phone also obtained the authority given by the Provincial Department. In a while, he turned over the case.

"This one is a farmer from Zhujiazhuang. If he were alive now, he would be in his early 40s. I didn't expect there to be middle-aged people willing to farm in the village now." Wang Zhong was an absolute young man, and his speech was quite young.

Wang Chuan happened to be in her early 40s too. She took Wang Zhong's mobile phone to look at it, then shook her head and said, "Doing things in the village doesn't necessarily mean farming. Maybe it's animal husbandry or something. If it's confirmed, I'll call and notify Captain Shen."

Jiang Yuan responded, and while Wang Chuan was on the phone, he signaled Wang Zhong to take a statement from the doctor.

How could the doctor remember an X-ray from 6 years ago? A minor operation like a humerus fracture was also not remembered.

Although this was the case, Wang Zhong's mood was still very good.

In this way, 1, 2, and 5, a total of 3 sources of corpses, could be considered clear. The average speed of determining one source of corpse in 2 days was not slow.

The remaining No. 3 should also have clues soon, and 46 would depend on the progress next.

Just thinking about it, he saw Wang Chuan coming back in high spirits.

"We don't need to go check No. 4 anymore," Wang Chuan said happily. "It's also news from noon. The source of the corpse has been determined."

"How was it found?" Jiang Yuan was surprised.

"Mitochondrial DNA." Wang Chuan said, thanked the doctor, pulled the two out of the door, and then whispered, "Our Bureau Chief went directly to the provincial capital, urging the Provincial Department's DNA laboratory to do it. Otherwise, it is estimated that we would have to wait in line for a week or two."

"So exaggerated?" Wang Zhong was surprised.

"Mitochondrial DNA can only be done by the Provincial Department. They have a lot of work. Moreover, our Bureau Chief expanded the scope of comparison to the whole province. Fortunately, it was expanded to the whole province, otherwise, it wouldn't have been matched..."

The degree of decay of the corpse was too deep, and extracting DNA normally was very difficult. For those who had abandoned corpses for several years, it usually had to be extracted from the bone marrow, but the success rate was not high, and it often needed to be done many times to be done.

Running DNA once takes about a day, unless you let the people in the DNA laboratory work overtime, and without sleeping, you can only run two trips a day.

Therefore, doing such DNA is very time-consuming.

As far as the current situation is concerned, 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 by the male family. Father, son, grandfather, and brother all share a set of Y-chromosomes.

Mitochondrial DNA is inherited by the maternal family. Grandmother, mother, and sister all share a set of mitochondrial DNA.

Y-chromosome DNA identification is now often used for criminal investigation within ethnic groups. For example, the perpetrator of the Bai Yin case used Y-chromosome identification to lock onto his uncle, and then locked onto himself.

The advantage of mitochondrial DNA identification lies in the strong viability of mitochondria, which can often maintain activity in a highly degraded environment and thus be identified. In the Hangzhou wife-killing case, the husband reported his wife missing. In the end, skin tissue and residual internal organs were washed out in the residential area's septic tank, and then mitochondrial DNA identification was used to prove it belonged to his wife, which locked onto the criminal facts.

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

If the peaks and valleys of the curve are consistent, it is an identification match, otherwise it is not a match. During this period, it is also necessary to deal with the pollution of mixed peaks.

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

The next day.

The task force held a large meeting.

Liu Jinghui looked radiant.

After several days of contention, Comrade Liu Jinghui had already occupied the upper hand in the right to speak.

Today is even more so. Shen Feihong, the detachment captain of the Qinghe Municipal Bureau, only said a few words and then gave up his position to Liu Jinghui.

As a cadre from the Provincial Department, Liu Jinghui didn't need to do so much foreplay. He was like participating in a one-night stand, rudely opening the hoof, and said, "After analysis, we have now printed the situation of several victims into a booklet and distributed it to everyone..."

Liu Jinghui also opened the white-skinned booklet and said, "Here, I would like to emphasize No. 2 and No. 3."

"No. 2, Zhu Jin, male, from Zhujiazhuang, 35 years old when he went missing 6 years ago, 1.7 meters tall. The special thing about No. 2 is that he was farming at home. Zhu Jin rented his relative's land to grow corn, totaling 40 or 50 mu. In addition, Zhu Jin and his wife raised 4 sows and made money by raising piglets."

"From the information I understand, because of raising pigs, Zhu Jin gave up going out to work. His daily activity area was relatively narrow, mainly in Zhujiazhuang and nearby village markets. He rarely went to the county town."

"However, on the day Zhu Jin went missing, he went out riding a motorcycle. Here, we have to consider the distance widened by the motorcycle. In addition, the whereabouts of the motorcycle can also be used as a clue to be considered."

Liu Jinghui broke the case into pieces, like an old hand in the nightclub, and soon convinced everyone at the meeting.

After introducing a few specific situations, Liu Jinghui talked about No. 3.

"According to the analysis of Wu Wu Fa Yi Jiang Yuan, we believe that the occupation of No. 3 requires long-term squatting and heavy lifting. After our screening of the missing population and DNA comparison, it has been found that the deceased of No. 3 is named Yu Jun, male, 38 years old, from Qinghe City, went missing 10 years ago. Before going missing, he was a coal miner at Zifeng Mountain Coal Mine in Qinghe City..."

In the conference room, there was a buzzing discussion.

Missing 10 years ago meant that the perpetrator's killing time was moved forward by another 2 years.

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

There was a perpetrator lurking and committing crimes for 10 years, and there was no news at all. To say it was a mistake seemed not to be the case, but to say that social security was excellent seemed to be unable to say it.

However, the perpetrator flowed through several cities in the surrounding area, and several municipal bureaus lost face together, so it didn't seem so collapsed.

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

Jiang Yuan also listened carefully.

Although in Jiang Yuan's view, deduction is very unreliable, if there is enough information, simple logical deduction can still get some useful conclusions.

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

Jiang Yuan soon understood Liu Jinghui's operation.

In the case of not being able to directly lock onto the suspect through the corpse, Liu Jinghui seemed to want to analyze the area where the perpetrator was located.

This is a bit stupid, but a very effective plan.

Because according to the existing judgment, the perpetrator needs equipment such as a chainsaw or oil saw to dismember the corpse, and he has possessed such equipment since 10 years ago. The proportion of such families or units is definitely not high.

If you can delineate the area where the perpetrator is located, even if the delineated range is large, thousands or tens of thousands of households don't matter. Hundreds of police officers are scattered, and there is a high probability of finding the person.

In fact, this is also the ancestral case-solving craft of the police. Why don't police like to do small cases? Because some small cases, theoretically, have to be done like this.

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

Although the sketching skill he once acquired was "only" LV2, it made Jiang Yuan feel a strong intuitive sense of drawing.

In the middle of the conference table, there were map books and other items of the local area.

Jiang Yuan leaned over and fished one back, and used the fountain pen he carried with him to draw on the spot.

He drew the areas where several victims lived.

His lines were very accurate, just like sketching. And in his mind, it was as if there were multiple little people running maps on the big map.

Mark the places they ran through with double shadows, and mark the places they might have run through with single-line shadows, just like doing a still-life sketch.

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

This result made Jiang Yuan a bit surprised.

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

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

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

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

"Moved?" This thought jumped into Jiang Yuan's mind. ===== CHAPTER 196 =====