Chapter 1167 Makes sense
Among various investigation directions, since Jiang Yuan chose to track the driver himself, investigating his escape direction and identity is the top priority.
Jiang Yuan and Liu Jinghui looked at each other, coughed slightly, and said, "First of all, we judge that the murderer will most likely escape from the country."
Liu Jinghui added: "The murderer clearly knew his target and was fully prepared. Instead of surrendering, he decided to escape. Basically, the only way to escape was to escape from the country."
"And fast." Jiang Yuan added, and continued: "We investigated some stuck points and surveillance after the incident. It can be seen that the murderer rode his motorcycle onto the national highway and left quickly. The route chosen in the surveillance area was very targeted and should have been prepared in advance. But if we talk about the route out of the country, there are only a few routes to escape the country. The direction in which the murderer left by riding is in the northeast direction. This is one of them.”
The director nodded and pointed out a single direction. Although it needed to be considered, it could be discussed later. Moreover, he himself was not prepared to discuss specific criminal investigation issues.
Jiang Yuan continued: "Secondly, observe the murderer's clothing..."
Jiang Yuan took out a photo of the murderer riding a mountain motorcycle passing by a national highway.
Several criminal police officers standing behind the director and others immediately stepped forward to look at the photos out of curiosity.
There were too many photos provided on site and the time was too tight. Most people didn’t finish them all, or they looked at them too quickly and didn’t have time to wrap their heads around them.
The director was also a police officer. He looked carefully at the photo Jiang Yuan took out. He looked up and down for a while, then his eyes lit up and he asked, "Is it because of the boots? Are these boots that only need to be worn in winter?"
Liu Jinghui said quickly: "The director has good eyesight. The boots he is wearing are really not suitable for the current weather in Changyang City."
The director's face lit up and he said modestly: "Is it possible that he was wearing thick clothes because he was going to ride early in the morning?"
"It's too thick. This is the same model on Taobao. It's velvet inside. It's a special thickened model to adapt to the bad weather below minus 30 degrees. At night in Changyang City, it's several 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 style of boots to the check list."
The director nodded with satisfaction: "This can indeed be considered."
"In addition, you can also see a backpack hanging on the back of his motorcycle. There are outdoor tents and sleeping bags outside the backpack. In this photo, you can see that the tents and sleeping bags are special cold-proof versions. It is also a route abroad. Because the inspection in the northwest is stricter, if you go abroad in the southwest or southeast, you don’t need such tents and sleeping bags. It’s too hot and heavy. The weight that the motorcycle can carry is limited, so there is no need to prepare these.”
The director reacted quickly and said by analogy: "So, he put on boots in advance to reduce the weight. Cold-proof boots are too heavy and take up space."
"Yes." Jiang Yuan nodded and said: "He needs to carry money with him, and probably also weapons. Carrying outdoor equipment and clothes on the motorcycle is already very heavy. If there are too many things, the off-road use of mountain bikes will be difficult. Sex will be greatly reduced.”
"Even so, if he really drives to the Northeast, his motorcycle will be of no use. In the snowy fields of the Northeast, a sled is just fine." After hearing this, a criminal police officer behind him couldn't help but step forward to speak. This is a matter that determines the direction of criminal investigation, and no one should take it lightly.
Liu Jinghui took over the words and said: "There are two possibilities here. One is that the murderer himself does not know the situation in the Northeast and just prepared these things as a matter of course. The other is that the murderer may change cars again after entering the Northeast. This idea is also very realistic. If he rides a mountain bike and enters the Northeast, it will take at least two or three days, and it may take four or five days. By then, the local manhunt intensity should be very low. If he is prepared, Other ID cards and the like can even be used on public transportation.”
"That makes sense." The director followed Liu Jinghui's lead and couldn't help but nod.
Jiang Yuan took over and said: "The third point..."
"Is there a third point?" The director was surprised and a little amused.
"The third point is to judge based on the footprints. It is mainly used as a reference." Jiang Yuan said this, and then showed several photos of footprints that looked similar to everyone as usual, and said: "Through the footprint identification, I think the murderer The ethnic group is most likely a Northeast Asian ethnic group. In China, this ethnic group is mainly composed of Northeastern Han people, Jiaodong Peninsula Han people, and a small number of North China inland and northwest Han people. "
Jiang Yuan: "To put it simply, it can be thought that the murderer's ancestral home is most likely Northeast China or Shandong, and less likely North China or Northwest China. Therefore, it is possible that he is familiar with the environment in the Northeast, and may even be from the Northeast himself. If he also aims to leave the country, , regardless of whether the murderer’s footprints are in the Northeast, Shandong or Northwest China, leaving Russia through the Northeast is a safer route.”
Although he had listened to many reports, this time, the director was still deeply shocked: "It is really rare to hear people use this kind of English and academic vocabulary during case analysis meetings."
"I'm a forensic doctor." Jiang Yuan smiled.
The director also smiled: "Do you call this a reference?"
"After all, the murderer's place of origin cannot directly determine the murderer's escape direction. The most important thing at this stage is to mobilize all parties to monitor the murderer's direction of travel." Jiang Yuan didn't talk too much about technology. He analyzed his lv5 footprints. Even though there were so many strong criminal investigation teams deployed to the scene, there was not even a single footprint expert of this level.
Moreover, even the few footprint experts in China who can reach LV5 are not necessarily good at analyzing human race through footprints, while Jiang Yuan's LV5 is comprehensive. Therefore, from this partial point of view, he can just give the answer directly, and there is no room for discussion.
The director did not move forward with just a few words of encouragement like he did before. Instead, he thought about it and decided: "The investigation to the northeast will be left to you, Jiang Yuan. I remember you were very good at it." Picture detective?"
"In terms of graphic reconnaissance, I am better at trajectory analysis and image enhancement. I also know some technical defense and surveillance technologies." Jiang Yuan frankly said what he is good at. His graphic reconnaissance-trajectory analysis is at the LV6 level, but that's it. It is limited to trajectory analysis, not as comprehensive as footprint analysis.
Jiang Yuan guessed that the director probably wanted to cooperate with other criminal police teams to do some technical support work.
He doesn't have any objections to this. In fact, he solves some problems from outside experts on a daily basis, especially the local police stations he has "communicated with". If you have questions that you are unsure about, he will basically answer them if it is convenient to answer them. .
Criminal investigation technology and ordinary technology are actually the same. They are both things that are not difficult for those who know them but difficult for those who don’t know them. A math problem may take hours or even days for those who are good at it. For those who are not good at it, it may take weeks or even months to look up information or even learn it from scratch. But for those who have already completed the pre-study, For example, it may only take a few minutes, but the difficulty of the questions that take several hours or even longer is already off the charts.
Jiang Yuan said it in an understatement, which sounded somewhat intimidating to other police teams.
If a young man were to say so blithely that I am good at blah blah blah, and know a little bit about blah blah blah, he would probably get backhanded sarcasm and blatant ridicule. But various stories about how Jiang Yuan handled the case have long been spread.
The two cases he just handled in Lanyue City used a lot of techniques related to picture investigation. Because Lanyue has a film and television city and it is a series of major cases, the two cases have attracted much attention from both the industry and the public. It's very high, everyone present knows it.
As for Jiang Yuan's ability to identify footprints, there is no need to explain. There have been too many cases that have affirmed it. At least 30% of the police force present have used it.
This made Jiang Yuan's answer not appear to be self-bragging at all, but all self-bragging.
"Okay, okay." The director said in an appreciative tone: "As for the picture detectives, you should also take more part in it, especially when the picture investigators encounter difficulties, you can help them actively solve them. No matter which team is the last to arrest If you catch the murderer, you will be credited."
He made a clear promise.
Jiang Yuan stood at attention and answered "yes", his emotional intelligence was high and orderly.
The director suddenly turned his head and said, "Lao Ge, what did you say?"