Chapter 1153: Makes sense

Among various investigation directions, since Jiang Yuan chose to track the driver himself, investigating his escape direction and identity was the top priority.

Jiang Yuan and Liu Jinghui looked at each other, coughed lightly, and said: "First of all, we judge that the criminal is highly likely to escape across the border."

Liu Jinghui added on the side: "The criminal clearly knows his target of the crime, and the preparation is sufficient. And he didn't surrender, but decided to escape. Basically, there is only one way to escape abroad."

"And it must be fast." Jiang Yuan added another sentence, then continued: "We investigated some card points and monitoring after the incident. It can be seen that after the criminal entered the national highway on his motorcycle, he quickly left the monitoring area. The route chosen was very targeted, and it should be a route prepared in advance. But if we discuss the route to go abroad, there are only a few routes to escape across the border, and the direction the criminal left by riding is consistent with the Northeast direction. This is the first point."

The director nodded. Just one point of direction, although it is worth considering, can be discussed later, and he himself was not prepared to discuss specific criminal investigation problems.

Jiang Yuan continued: "Secondly, observe the criminal's clothing..."

Jiang Yuan took out a photo, which was a photo of the criminal riding a mountain motorcycle passing a national highway.

Several criminal police officers standing behind the director and others immediately stepped forward curiously to look at the photo.

There were too many photos provided at the scene, and the time was too tight. Most people hadn't finished reading, or they looked too fast, and their brains hadn't turned around yet.

The director had also been a policeman, looking carefully at the photo Jiang Yuan took out, looking up and down for a long time, and then his eyes lit up, asking: "Is it because of the boots? These are boots that only need to be worn in winter, right?"

Liu Jinghui hurriedly said: "Director has good eyes, the boots he is wearing are indeed not suitable for the current weather in Changyang City."

The director's face glowed, and he was modest: "Could it be that he considered riding in the early morning, so he wore a bit thicker?"

"Too thick. This is the same model on Taobao. It is lined with velvet inside. It belongs to a specially thickened model, which is to adapt to the harsh weather below minus 30 degrees. The night in Changyang City is only a few degrees below zero." Jiang Yuan took out another photo and added: "At that time, you can add the customers of these merchants selling the same model of boots to the investigation list."

The director nodded with satisfaction: "This can indeed be included in the scope of consideration."

"In addition, you can see a backpack hanging behind his motorcycle. Outside the backpack, there are tents and sleeping bags for outdoor use. In this photo, you can see that the tents and sleeping bags are specially cold-proof versions. It is also a route to go abroad. Because the inspection in the Northwest direction is stricter, if you go abroad in the Southwest or Southeast direction, you don't need such tents and sleeping bags. It is too hot and too heavy. The weight that the motorcycle can carry is limited, and there is no need to prepare these at all."

The director reacted quickly, drawing inferences from one instance: "So, he wore boots in advance, also to reduce the burden. Cold-proof boots are too heavy and take up too much space."

"Yes." Jiang Yuan nodded and said: "He has to carry money with him, and he may also have to carry weapons. Outdoor equipment on the motorcycle, plus clothes, is already very heavy. If things are too many, the off-road performance of the mountain motorcycle will be greatly reduced."

"Even so, if he really drove to the Northeast, his motorcycle would have no use. In the snow in the Northeast, a sled would be about the same." A criminal police officer behind heard this and couldn't help but speak up. This is a matter of determining the direction of criminal investigation, and no one will take it lightly.

Liu Jinghui took the words and said: "There are two possibilities here. One is that the criminal himself doesn't know the situation in the Northeast, but just prepared these things as a matter of course. Another possibility is that the criminal prepared to enter the Northeast and then change vehicles again. This line of thinking is also very consistent with reality. If he rides a mountain motorcycle and enters the Northeast range, it will take at least two or three days, and four or five days is also possible. By that time, the intensity of the local search should be very low. If he has other ID cards or something, he can even take public transportation."

"Makes sense." The director followed Liu Jinghui's rhythm at this time and couldn't help nodding.

Jiang Yuan took the relay and said: "The third point..."

"Is there a third point?" The director was surprised and a little happy.

"The third point is judged based on footprints, mainly as a reference." Jiang Yuan said such a sentence, and then displayed several footprint photos that looked the same to everyone as usual, and said: "Through footprint identification, I think the criminal's race is highly likely to be the Northeast Asian ethnic group, northeast. In China, this ethnic group is mainly Northeast Han Chinese genes, Jiaodong Peninsula Han Chinese, and a small number of North China inland and Northwest Han Chinese."

Jiang Yuan: "Simply put, it can be considered that the criminal's ancestral home is highly likely to be Northeast, Shandong, and less likely to be North China or Northwest. Therefore, it is possible to be familiar with the environment in the Northeast, or even be a Northeast person himself. Similarly, with the goal of escaping across the border, regardless of whether the criminal's footprints are in the Northeast, Shandong, or Northwest North China, going abroad from the Northeast to Russia is a safer route."

Although he has heard many reports, this time, the director was still deeply shocked: "It is really rare to hear this kind of English and academic vocabulary at a case analysis meeting."

"I am a forensic doctor." Jiang Yuan smiled.

The director also smiled: "Do you call this a reference?"

"The criminal's ancestral home, after all, cannot directly determine the criminal's escape direction. At the current stage, the most important thing is to mobilize forces from all sides and retrieve monitoring according to the criminal's direction of travel." Jiang Yuan didn't talk much about technology. His lv5 footprint analysis, don't look at the fact that so many criminal investigation strong teams have been mobilized to the scene, there is not even one footprint expert at this level.

Moreover, even if there are a few footprint experts in the country who can reach LV5, they are not necessarily good at analyzing race through footprints, and Jiang Yuan's lv5 is comprehensive. Therefore, for this biased angle, he just gave the answer directly, and there is no room for discussion.

The director didn't encourage a few words and move forward like before, but thought about it and decided: "Then the investigation in the Northeast direction will be left to you, Jiang Yuan. I remember you are also very good at image investigation?"

"In terms of image investigation, I am relatively good at trajectory analysis and image enhancement. In addition, I also understand some technical defense monitoring technologies." Jiang Yuan frankly stated the direction he is good at. His image investigation-trajectory analysis is at the LV6 level, but it is limited to trajectory analysis, not as comprehensive as footprint analysis.

Jiang Yuan guessed that the director should want him to cooperate with other criminal police teams to do some technical support work.

He didn't have any opinion on this. In fact, he solves some problems of experts from other places every day, especially the police stations where he has "exchanged" places. If there are problems that are not sure, they will be handed over, and if it is convenient to answer, he will basically give answers.

Criminal investigation technology and ordinary technology are actually the same. They are things that are not difficult for those who know, and difficult for those who don't. A math problem, those who know a little may have to do it for several hours or even several days, and those who don't know much check information or even learn from scratch, maybe it will take several weeks or even several months, but for those who have completed pre-learning, it may be a matter of a few minutes. The difficulty of problems that take several hours or even longer has already exploded.

Jiang Yuan said it lightly, and it fell into the ears of other police teams, which was somewhat threatening.

If it were a young man who said so lightly that I am good at blah blah, and understand a little wah wah, what he got would mostly be dark sarcasm and bright ridicule. But how did Jiang Yuan handle the case? Various stories had long been spread.

The two cases he just handled in Lanyue City used a lot of image investigation-related technologies, and because Lanyue has a film and television city and is a series of major cases, the attention of both the industry and the public is very high. Everyone present knew it.

As for Jiang Yuan's footprint identification ability, there is no need to explain. Too many cases have given affirmation, and 30% of the police teams present have used it.

This made Jiang Yuan's answer not show any self-boasting ingredients at all, and it was all self-boasting.

"Good, good, good." The director used an appreciative tone: "Then in terms of image investigation, you should also participate more, especially when image investigation encounters difficulties, you can help them solve them actively. No matter which team finally catches the criminal, you will be credited."

He was clearly promising.

Jiang Yuan stood at attention and answered "Yes," and his emotional intelligence was full and regular.

The director suddenly turned his head at this time: "Old Ge, what do you say?"