civil forensic

Chapter 917 Visit
Shen Yaowei searched along both sides of the Taihe River for more than a week. He did not even go home for two days on the weekend. He walked nearly 20 kilometers along the upper reaches of the Taihe River to collect samples.

This distance is already quite long. In the previous Ningtai County Bureau, it was basically the limit. If they continued to search along the river, the burden on the laboratory would be too heavy.

However, after searching for such a long distance, no matching diatoms were found, which means that either the sampling was unlucky or the victim's entry point was not within 20 kilometers upstream.

This conclusion made Shen Yaowei nervous.

Early Monday morning.

Shen Yaowei asked about the laboratory results at the time of work. After confirming that there was still no winning result, he went to Jiang Yuan to report dejectedly.

Ningtai County Bureau has not had such a difficult case for a while. Of course, this is not a traditional Ningtai County case, but a case in the entire Taihe River Basin. In the past, it would most likely be coordinated and arranged by the Qinghe City Bureau. Or, if the floating corpse drifted to other cities, it would have nothing to do with Qinghe.

Knowing the complexity of the floating corpse case, Shen Yaowei was a little helpless when he reported: "We started by sampling every 300 meters, and later changed it to sampling every 150 meters, but we didn't match any of them. This body must have floated down from Pingzhou."

Once a body crosses the provincial border, the difficulty of investigating the case will increase by a level. Not only will communication be troublesome, but the key is that the cost of the funds will also increase by a level, which is a fatal flaw for most county bureaus.

However, this is not a problem for Jiang Yuan's special task force on backlog cases. Ningtai County's infrastructure speed and level have been maximized, and the little scraps that have emerged from between the fingers have benefited the court and the procuratorate. In comparison, the funds for solving cases are more abundant.

Jiang Yuan thought about it and said, "We can't rule out this possibility."

"Yes, if it can float 20 kilometers, it can float 200 kilometers. This case is going to be troublesome." Shen Yaowei sighed heavily. He also hoped to solve the case with great momentum. Especially since Jiang Yuan paid more attention to him recently, Shen Yaowei had a mentality of making achievements.

Shen Yaowei's cousin Shen Yaoguo is the captain of the Changyang City Public Security Brigade, which is a very comfortable and good position in the police system. But in terms of business and the chain of contempt in the police, the poor and professional criminal police are always at the top. Shen Yaowei does not expect to be as high as his cousin, but if he can achieve something as a criminal police, his career will be worthwhile.

Shen Yaowei was a man with many thoughts and ideas. Thinking of this, he couldn't help but look up at Jiang Yuan and said tentatively, "As far as I know, in some places, drowning cases, especially bodies washed down from upstream, where the circumstances are not clear, are often reported as unnatural deaths."

Unnatural death is relative to normal death. Murder is an unnatural death, and drowning, traffic accidents, or various accidental deaths are also unnatural deaths. For the police, unnatural death excludes the possibility of homicide. In other words, it is not a criminal case.

If it is not a criminal case, then there is no need to solve it. If it is solved, does it count as solved?

Jiang Yuan, however, would not have such an idea. He traveled to so many places last year to handle cases, all of which were difficult cases in various places. It was impossible for him to return to his home turf and make a half-cooked meal.

"Call Director Liu." Jiang Yuan's existing technology also has limitations. When biometric identification technologies such as DNA, facial recognition and fingerprints are unable to work, it is very difficult to determine not only the source of the corpse, but also the location of the corpse.

At this time, Liu Jinghui's reasoning ability seemed quite useful.

While waiting for Liu Jinghui, Jiang Yuan took a few more fingerprints and cleared several topics in the "Shannan Fingerprint Exchange Group".

Because experts like Jiang Yuan are willing to actively answer questions, the Shannan Fingerprint Exchange Group is very famous in the field of fingerprint detection, and it is inevitable that people from other places who are experts in fingerprint detection will join in. Jiang Yuan treats everyone equally and answers questions whenever he can.

He is not like many famous experts. When he became famous, he was already old and could not do much even if he wanted to do something, so he cherished his physical strength and energy. In addition, many people are not familiar with the Internet and often do not answer questions in similar groups.

Jiang Yuan's current fingerprint identification skills are top-notch in the country, but he is only in his early 20s and works in a small unit like Ningtai County. Apart from solving cases, he has almost nothing to do every day, and he has nowhere to vent his energy. Spending a few minutes to compare the fingerprints in the group is simply a pastime for Jiang Yuan.

Especially after the members of the "Shannan Fingerprint Exchange Group" gradually became familiar with Jiang Yuan, they also knew that he liked information feedback. From time to time, they would report who was sentenced to death, life imprisonment, or ten-year imprisonment because of a fingerprint match. Jiang Yuan would feel very happy.

On the other hand, some experts who joined the fingerprint group later may have wanted to find Jiang Yuan to do fingerprint identification at the beginning. After they finished the fingerprints they wanted to identify, they were always embarrassed to leave the group. In order to repay the favor or the interest of the favor, everyone would often take a few fingerprint identification jobs in the fingerprint group and help people do matching.

As time went by, the scale of the "Shannan Fingerprint Exchange Group" grew, the speed of solving problems increased, and more people joined.

"Jiang Yuan." Liu Jinghui drove over as soon as he received the message and arrived very quickly.

Jiang Yuan smiled and said hello, then asked Liu Jinghui to sit down. While serving tea, he asked, "Has anyone told you about the case? What do you think?"

"I have seen that a 21-year-old woman cannot be identified by facial recognition, has no DNA record, and has no fingerprint record. This is rare in itself." Liu Jinghui paused and asked, "I wonder how good the sketch you drew is? What's the quality?"

"It's about the same level as my footprint identification." Jiang Yuan needed to inform his teammates of this information.

Liu Jinghui's eyelids jumped: "When did you learn this technique?"

"I learn things very quickly." Jiang Yuan felt that this was enough of an explanation.

As expected, Liu Jinghui did not ask any further questions. What was there to ask? There really are people in this world who have photographic memories, and there really are people who have absolute pitch accuracy. Many of the technical skills that Jiang Yuan has currently demonstrated are already at the top domestic and even international levels. It would be funny to talk about hard work instead of talent.

"If there is such a high level of sketching, then it means that the face of the deceased is not in the photo library. Didn't he have a second-generation ID card?" Liu Jinghui reasoned from one sentence, and then reasoned a step further, saying: "It is basically unlikely that he is a city resident. It is very inconvenient for him not to have a second-generation ID card at the age of 21. It is likely that he lives in the countryside, with poor living conditions and poor family conditions."

Jiang Yuan nodded slowly: "There are traces of labor on the hands and feet, so it is indeed possible."

He can only support Liu Jinghui's inference, but cannot infer the opposite. In terms of the current environment, the traces of labor on his hands and feet, and even the long-term labor environment, it cannot actually prove that he lives in the countryside. Even the concept of living in the countryside is already vague.

But on the other hand, in today's society, it is quite rare for a 21-year-old girl to have a decent appearance but to live in the countryside and work for a long time.

Liu Jinghui continued, "She has a poor family background and poor living conditions. She is a 21-year-old woman who has lived in the countryside for a long time. She is probably married... Of course, she probably didn't get a marriage certificate. Has she ever given birth? Did she have an abortion?"

Both of these can be seen during the autopsy.

Jiang Yuan shook his head and said, "No. There are basically no signs of medical treatment. The teeth are not very straight either, and there has been no treatment."

"It can only be said that this further proves the previous point. The key now is that it is difficult to determine where she is from." Liu Jinghui pondered for a while, took a sip of tea, and then said, "Do we have to start from the place where the body was found and continue upwards?"

The cost of visiting is much lower than that of investigation. In this case, it basically means going to nearby villages and asking whether there have been any missing people in recent days, whether anyone has been seen, or whether there are any abnormal circumstances.

The key lies in the scope. If it is traced back a few dozen kilometers, it is not a big deal. But if it is traced back a hundred kilometers, the workload is too large. Because it is impossible to visit only the nearest village along the river. On the contrary, the villages further into the mountains are poorer. Moreover, there is no standard for poverty. How poor is considered poor?
"Let's start visiting. At least, we have photos. If we visit a few more villages, we might get something." Jiang Yuan thought about it and made a decisive decision.

(End of this chapter)