National Forensic Doctor

The person who came with Liu Sheng and sent photos of the suspect's footprints was Chen Guoning from the Criminal Division Center of Zhengguang Bureau.

The two first put the photos on Jiang Yuan's desk, and Liu Sheng said again: "There are 7 suspects left who were screened out by the footprints. I asked Lao Chen to broaden the scope a little more, and there are 12 suspects in total." , see if you can sift it more finely."

After finishing speaking, Liu Sheng said again: "Old Chen, Chen Guoning is an old trace examiner in our Zhengguang Bureau, and he is also good at footprint identification and analysis. His master is the veteran of the Criminal Investigation Center. He used to work with Ma Yulin, the master of footwork tracking. I trained as an apprentice, and after I came back, I arrested several truckloads of criminals within a month, which became a legend."

"Awesome. Hello, Chu Chen..." Jiang Yuan came to the capital with some emotional intelligence.

Chen Guoning looked at people who were in their forties or fifties, and smiled and said: "The most powerful one is my master. If you really want to be a legend, it has to be senior Ma Yulin. The biggest regret in my life is that I have never met this old gentleman. I have consulted with Master for several of Mr. Ma’s apprentices, but I, in Master’s words, have dull qualifications and am not very enlightened. I have learned only half a bucket of water, and I have to ask Captain Jiang for advice.”

In just a few words, he absorbed the awkwardness in the office with the stories of old-timers. Of course, you can still hear a little bit of dissatisfaction. After all, Jiang Yuan wants to re-screen the list and photos he has screened. If he is more angry, he can even say that Jiang Yuan is riding on his neck to do things. .

However, the "target" of the "Carrion Case in the Rain" was too big, and the mastermind was still the same as the case within the case. Chen Guoning was indeed powerless. In this case, he could only let Jiang Yuan do his best.

Moreover, because of Jiang Yuan's previous ability, Chen Guoning even wanted to defuse the atmosphere.

Jiang Yuan is actually very familiar with this atmosphere.

This is a problem inherent in backlogged cases. The task force behind the backlog solves the cases based on the current case working group by checking for omissions. Even if there are no problems at all with the current case team, the work of the backlog team can still be compared to the imperfections of the existing case team.

Jiang Yuan smiled habitually and could only say that half of the fees collected by Huang Qiangmin were under pressure.

"For footwork tracking technology, it is best to have multiple sets of footprints." Jiang Yuan explained briefly.

It can be said that domestic footprint identification technology is all learned from Ma Yulin, a herdsman who started herding sheep at the age of 12. He created an art of criminal investigation based on his own observation, comparison and pondering.

Over a long period of time, the disciples who learned from Ma Yulin opened a large number of further training classes across the country and trained China's first batch of criminal police officers in footprint identification.

Speaking of being self-taught, Jiang Yuan, who is only responsible for the system, is still far behind Comrade Ma Yulin in terms of depth.

Jiang Yuan guessed that this kind of technology, which was far beyond ordinary people and far beyond the contemporaries of criminal investigators all over the world, must be at the level of LV8.

It is conceivable that before the 1980s, mainly in the 1960s and 1970s, when there were dirt roads and mud roads everywhere in the country, Ma Yulin's footwork tracking could be applied in almost all kinds of cases.

In contrast, the theoretical foundation of today's footprint identification is more solid, and the scope of application is wider. But to say that it is easy to use, it may not be as good as it was back then.

"Where are Team Jiang going to start?" Chen Guoning did not discuss the technical details with Jiang Yuan. He had already seen many cases of Jiang Yuan's footprint identification in private. He was not very familiar with how far Jiang Yuan could achieve... Sure.

In Chen Guoning's view, when many cases could no longer be advanced through footprint identification, Jiang Yuan was still able to make incredible judgments, but Jiang Yuan's judgments were always proven to be correct afterwards.

Today's case actually has this flavor. As Jiang Yuan said, if there are multiple sets of footprints, Chen Guoning can also make a more detailed judgment, but if there is only one single footprint, then there will be no stride and gait. The difficulty increases greatly.

Anyway, Chen Guoning has already reached his limit. There is a backlog of serial murder cases. No need to remind him, he has also used all his strength. No matter how detailed it was, he was really powerless.

"Let's take a look first." Jiang Yuan smiled, then looked at the photos to compare them.

After looking at more than a dozen photos for a minute or two, Jiang Yuandao said, "Is there the original photo? Let's put it on the computer and take a look."

"I'll pass it to the backstage." Liu Sheng, who was sitting there feeling bored, immediately got up and made a call.

Jiang Yuan turned on a 55-inch monitor mounted on the wall, waited for the photos from the background to be uploaded, and then opened the original pictures to read carefully.

After looking at two or three pictures, Jiang Yuan stopped and said, "We can focus on investigating this person."

"Yang Wanjun?" Liu Sheng first looked at the photo number, then matched it with the suspect, and said: "This is the cousin of the victim Liu Zhiwu, the son of his mother's brother. He is considered a close relative... Well, the height and weight are consistent. Let’s investigate it intensively.”

Liu Sheng was basically confused. This case has entered the current stage, all the information is new, and Liu Sheng has not been exposed to it before.

For crimes like this between close relatives, the criminal motive is often more important and more difficult to obtain.

Liu Sheng first made a phone call and asked his men to investigate. Then he turned around and said, "Captain Jiang, are these footprints confirmed to be the same? Are they of the same person? Or are they just suspicions."

Jiang Yuan thought for a while and said: "Eighty percent of it belongs to one person. The conditions of the footprints at the scene are like this. The main thing that can be seen is the reaction pressure of the footprints, as well as the width and inclination of the pressure surface, from these directions. Judging from it, it is more consistent with Yang Wanjun’s.”

Liu Sheng hurriedly explained: "I think Liu Zhiwu is the project manager of a decoration company, and he must have offended a lot of people, and we have not yet fully sorted out his work contacts."

Liu Sheng now acts as if the form is not long enough and a criminal policeman is not confident enough.

Chen Guoning was staring at the screen, researching in the direction Jiang Yuan just said. When he heard Liu Sheng's words, he couldn't help but said: "Didn't he say that there was a worship ceremony? Will the customers worship him?"

Liu Sheng was stunned for a moment, then smiled and said: "It's possible that he is feeling uneasy. Well, let's check this Yang Wanjun first."

Liu Sheng said and went out to make arrangements.

Theoretically, it is possible for a criminal suspect with no criminal record to directly come to the door for questioning and obtain a large amount of information. Many people cannot even handle face-to-face questioning by criminal police. If it is an ordinary small case, it is usually handled in this way. of. Collecting evidence in advance belongs to the big case family.

In other words, in a case like today's, even if the criminal policeman is confident and uses his momentum to deceive a confession, he still needs to collect evidence first if possible.

This is just like at the poker table, no matter how strong the psychological warfare master is, he is not as good as a novice who is lucky.

Jiang Yuan and Chen Ningguo wrote the appraisal report together, signed and sealed it, and then went downstairs.

At this time, the office gradually became lively.

"Liu Chu." Jiang Yuan went downstairs and saw Liu Jinghui and Li Haochen squatting in the corner, looking at a screen together.

"Oh, Jiang Yuan is here." Liu Jinghui's expression was bleak.

"Is there any progress in the case?" Jiang Yuan was somewhat familiar with Liu Jinghui's expression.

Liu Jinghui nodded: "After Liu Zhiwu's death, Yang Wanjun became the first heir to Liu Zhiwu's mother's inheritance."

"Hey, looking for money?"

"A real estate worth 3 million is worth 4 million, so I can't be sure yet." Liu Jinghui curled his lips and said, "Liu Zhiwu's mother only has this kind of real estate, and the remaining cash assets are up to 200,000."

"A house worth 4 million is not bad. How many people can't earn so much in their lifetime." Li Haochen said slowly with a serious expression: "Yang Wanjun's job is unstable. There is basically no job that can last for half a year and even 100,000 yuan a year." He can't make any money. His father's house in his hometown is not worth 1 million. His aunt's house is the only way for him to own a house in the capital."

"He understands technology?" Jiang Yuan asked the key question.

To film the process of He Wei committing a crime, even the process of dumping the body, requires certain equipment and technology. Subsequently, the way the two communicated through foreign software was not easy for ordinary people to operate.

"It's not sure yet. But Yang Wanjun is a photography enthusiast and has worked for several small e-commerce companies." Liu Sheng came over at this time with an excited expression. From his point of view, as long as the case can be solved, whether the method of investigation is elegant or elegant is not considered at all.