Chapter 1031

While Liu Jinghui began to apply for technical investigation intervention, Jiang Yuan began to study Corpse No. 3.

Corpse No. 3 has a higher degree of incompleteness, missing head, missing fingers, missing toes. Although the remaining parts can be used to judge basic items such as age, height, and gender, to get a more accurate answer, the difficulty is greater than that of Corpse No. 1.

And Jiang Yuan studied Corpse No. 1 for several days.

At his level, doing forensic anthropology is no longer as simple as using the pelvis to judge gender and using long bones to judge height.

Sternum, vertebrae, and even clavicle can be used to judge information such as age, height, and gender. These studies were originally to meet the needs of dismemberment cases, but at a higher level, they are equivalent to a question with six solutions. Although the six solutions point to the same result, the degree of refinement is definitely different.

If the question is large enough, it is like a question with three small questions. It actually represents three different stages in the process of moving towards the same goal.

Using multiple bones to judge at the same time will not only have higher accuracy but also be easier to get relevant information about the deceased before death.

Overall, the more thorough the understanding of a bone, the more inferences there will be.

And Corpse No. 3 is not good enough from every level. From the perspective of the police, it is a very difficult corpse to solve.

It is the same for Jiang Yuan.

However, Jiang Yuan was stuck for a day... Liu Jinghui first took out a table.

Space-time intersection is already a very mature technology for technical investigation. Especially after responding to the epidemic, in the process of finding various close contacts, the improvement and popularization speed of this technology is extremely fast. It is not an exaggeration to say that it is both good and fast.

Related technologies, such as electronic fences, can sometimes even break through the boundaries of mobile phones to determine the time a person passes through a specific location. Combined with technologies such as surveillance, face recognition, and gait recognition, it is easy to find a person without anti-reconnaissance experience.

After reporting Jiang Yuan's name, the technical investigation only took half a day to list a list of 178 people who met the conditions for Liu Jinghui.

Liu Jinghui screened them one by one, and when he took it to Jiang Yuan, there were still 67 people left.

"Xu Li didn't contact many people during normal work, but he occasionally came to the front to display goods, and the people he contacted at this time were many." When Liu Jinghui told Jiang Yuan, he didn't feel difficult at all, but his expression was quite excited.

Inferring the real murderer from a pile of suspects is what Sherlock Holmes did.

Especially when there is a gold-rimmed flashing diamond Watson by his side, the reasoning is even more motivated.

Liu Jinghui stroked the list with one hand and said: "Regarding the screening of this list, I have a short-term plan and a long-term plan."

Jiang Yuan beckoned Wang Chuanxing in the corner of the office to record, and then nodded to Liu Jinghui.

Liu Jinghui said: "The long-term plan is very simple. Investigating the trajectories of these people on the list at the time of the murder in turn should be able to exclude most people. The remaining people should be treated as key investigation objects. If necessary, you can refine the time of the crime or investigate from the perspective of the murder weapon and the crime scene."

Liu Jinghui said confidently again: "The short-term plan is simpler. Now people have very limited time away from mobile phones, but since the murderer dares to provoke the police, he must be familiar with some of our investigation methods. I think he is likely to be away from the mobile phone during the three time periods of murdering No. 1, No. 2, and No. 3. Let's look at the list, people with relevant records, maybe we can find something."

Wang Chuanxing said at this time: "Isn't this list a list of space-time intersection? If he is away from the mobile phone... Oh, this list is the space-time intersection when the murderer observed and contacted Xu Li. When he killed, he might not bring a mobile phone?"

"That's about what it means." Liu Jinghui nodded slightly and said: "The murderer may also have a second mobile phone, or not carry a mobile phone during the process of contacting Xu Li, but these are very difficult. The murderer is easy to make mistakes if he is not careful, and there is still considerable investigation value."

"Okay." Jiang Yuan also doesn't need a 100% strategy.

If it is Xu Taining doing the screening, it really needs a near 100% guarantee. Because it costs too much money, even in a provincial capital city like Changyang City, using Xu Taining, it is difficult to accept the ending that the money is spent and the case is not solved.

As for whether it is reasonable or not, comparing it with the big directors of commercial films can be understood. Under high-risk investment, you are still allowed to have great autonomy, so you must use past achievements to endorse it.

Speaking of which, Liu Jinghui's plan doesn't need to be so particular. The screening of dozens of people is not suitable to be described as "screening", just use investigation directly.

Even if Liu Jinghui wants to check more carefully, this quantity and difficulty can only be described as ordinary work for the criminal police team.

Getting Jiang Yuan's approval, Liu Jinghui commanded the criminal police for the first time.

This case is Ningtai County's own case, so there is no need to be like being in another place, needing the permission and approval of the local police team.

Wu Junhao's riot police squad and Liu Wenkai's criminal police squad were already eager to try. After Liu Jinghui assigned the tasks, they immediately moved.

Wu Junhao's riot police squad is really moving. The long-term plan executed is to ask everyone on the list and record their daily activity trajectories in the form of transcripts.

Liu Wenkai's criminal police squad took the short-term route, first getting results from the technical investigation, and then directly investigating the "key" suspects screened out. But this investigation was more meticulous. While using technical means, they also had to send criminal police to the door. Those who still did not exclude suspicion began to send people to follow.

The routes of the two sides overlapped slightly, and Liu Jinghui didn't care, because the overlapping suspects themselves had a higher degree of suspicion. Investigating twice or changing people to investigate is also a mode of investigation.

In the next few days, the conference room on the 9th floor remained busy with lights on.

The list of 67 people quickly dropped to 23, then 17, 12, 6, 3... until 0.

"Everyone's suspicion has been excluded." Liu Jinghui didn't completely fail to consider this possibility, but getting this result in the end was still a bit beyond his expectations.

"Do you want to investigate the key suspects again?" Huang Qiangmin received the news and came over, without saying complaints or comfort, directly expressing support for Liu Jinghui.

Liu Jinghui was slightly moved, but shook his head slowly and said: "The investigation has been very careful. Doing it again is not very meaningful. The suspects have been excluded. Unless our clues are wrong, otherwise, the suspect is not within the scope we have defined."

This is the most annoying kind of screening or investigation. You investigated a large number of suspects, only to find that the suspects were all excluded. If you start over, it is equivalent to starting over.

Liu Jinghui pondered for a moment, looked at Jiang Yuan, and asked: "Or start from Corpse No. 3, determine the source of the corpse, and then look for commonalities?"

"No. 3 is more difficult to handle. If you want to determine the source of the corpse, you might have to do a large screening." Jiang Yuan also studied Corpse No. 3 for several days, replied, and then said: "The identity of Corpse No. 2 has been clear, and it cannot be contacted for the time being. No. 3 is probably also a result."

Jiang Yuan is now doing his own case. When it is not at the end of his rope, it is impossible to do a city-level screening.

Liu Jinghui had to admit that his gold-rimmed flashing diamond Watson made sense.

Among the three corpses found so far, the first corpse is still the most valuable and the one that can provide the most clues.

Compared with the last two corpses, the randomness of the first corpse seems not to be so strong—of course, this is also Liu Jinghui's reasoning at this time.

Liu Jinghui also frowned slightly, thinking, if there are no new clues, the reasoning must be more refined.

Jiang Yuan said at this time: "Perhaps you can start from the murderer's skills."

"Knife skills?" Liu Jinghui reacted immediately. This is not uncommon in criminal cases, and immediately asked: "Do you think the murderer has a medical background?"

"En, very skilled with a knife, either has a medical background, or a forensic background, or has been a butcher or a chef." Jiang Yuan paused and said: "Without three or five years of long-term practice, his method of cutting the corpse cannot be so accurate."

Cutting a corpse is a typical practical behavior, not something you can learn by reading books. Only when you cut a lot, the feeling when the knife enters, and the strength of the cutting can be grasped accurately, can you cut out such smooth cuts on the three corpses.

Liu Jinghui nodded gently: "We previously assumed that the murderer had a space-time intersection with the suspect. Now if we cancel this point, I think we can broaden the scope of suspicion to the work scene and life scene of the victim Xu Li, and the number of people can be defined more."

This is equivalent to a professional background investigation. Even if the number of people defined is very large, the time and human cost will not be too high. Liu Jinghui turned around and immediately became busy.

Of course, after people with corresponding backgrounds are defined, further investigation by criminal police is needed.

At this time, a man named Bian Yizhang entered the eyes of the special case team.

"Bian Yizhang. Tobacco and liquor store owner. Long-term employment of two employees. His tobacco and liquor store is only 50 meters away from the supermarket where Xu Li is located. He has done private slaughter, served as a joint defense member, done volunteer work, and often participated in some social welfare activities. From the judgment of technical investigation, he often carries two mobile phones, and the mobile phones are often turned off or away from him."

If it weren't for the large amount of investigation in the early stage, just looking at the information read out by Wang Chuanxing, Bian Yizhang could be said to have no suspicion at all. Wu Junhao even talked to Bian Yizhang face to face.

However, as the investigation progressed to the present, these seemingly ordinary identities and behaviors of Bian Yizhang were like dog-head gold shining in the eyes of the members of the special case team.