National Forensic Doctor

Chapter 661

The social software dating case selected by Cui Qishan, or the face-to-face murder case, is a difficult case in the new era.

First of all, there is a delay in the discovery of such cases. The victim travels to a different place and cannot be contacted for several days. It is easy for friends to regard the victim as normal. By the time the crime is reported, a long time has often passed. Moreover, the person who reports the crime usually reports the crime to the security guard at the place of departure, not the place where the crime occurred, which makes it difficult to use the police.

Sometimes, the level of trouble is even higher when it's not even known where the victim actually went.

Secondly, there is the issue of body identification. Disappearances and deaths receive different attention, especially for the victim who hooked up with a gay man. It is not necessarily true that he or she ran away to Hoh Xil because he or she was in love. And to hide the body, the murderer who is in a different place and has plenty of time still has a lot of opportunities.

The key to solving the case lies mainly in technical investigation. After the real-name network becomes real-name, most people's identities can be tracked and traced. Therefore, ordinary remote interviews with passionate murders can basically be solved.

The trouble lies with some criminals who are prepared.

An anonymous phone card, a forged identity, and so on. Although the police also have such fences, technical detectives, and so on, if the murderer uses a forged identity, he will go on the run to commit crimes. , and in the middle, if you know some counter-detection skills, such as pulling out the phone card and changing the contact information, then how will the police respond?

To be honest, there are not many strategies to deal with it. This is one of the reasons why human trafficking continues to be banned. It is not just economic factors, but also problems that are difficult to detect.

If a case can be solved, especially if it is easy to detect, its economic efficiency will also decrease.

In addition, face-to-face killings are similar to random crimes to a certain extent.

Social software for hooking up is usually for socializing with strangers. Who you contact and who you can hook up with are mostly random. The murderer may have a pattern, but cracking the pattern usually appears in TV series. Movies are not popular because the verification process takes too long.

For the police, in order to solve such a case, the normal process depends on whether the technical means are adequate or not. Fortunately, domestic software servers are well controlled, and the technical level of murderers is usually not high, but there are always exceptions...

Of course, Cui Qishan is now betting that his case will not be an exception.

Each of the nine police officers he selected has long-term experience in technical work. They are not necessarily good at technology, but they are familiar with various technical methods and know who to call in any situation. At the same time, they are extremely experienced. The criminal police officers are not only able to carry out investigation work independently and as a team, but also can standardize their work, know how to collect evidence, and can withstand the stringent requirements of the two houses.

In essence, the police officers he found were similar to Pang Jidong-type criminal police officers. Pang Jidong learned so much knowledge of forensic botany from Jiang Yuan, and his purpose was just to use forensic botany to solve crimes.

Cui Qishan was very optimistic about this and led the criminal policemen into enthusiastic work.

He believed that given the professionalism of the task force he had formed, not only would it be easy to detect the social software dating case, but it would definitely be no problem to advance it.

Cui Qishan plans to restart the case first

At the same time, Tao Lu personally led a group of people to study the villagers of Fangxia Village.

Jiang Yuan used the technique of identifying footprints as usual, and first classified the footprints that had entered the bedroom.

The footprints left by the police were eliminated first, and then the footprints of other villagers who came in to watch the fun were eliminated. There were still more than a dozen left, and there were even more objects for suspicion.

Liu Sheng was in charge of this area and said with a sad face: "Nowadays, people are running all over the world. The murderer probably took the opportunity to go out. At the beginning, he might be afraid of being suspected, and he might stay in the village. Even if he ran away, it would be easy to find him. If he comes out and stays in the village after such a long time, I will doubt his intelligence."

Liu Sheng seemed to be complaining, but actually he was complaining.

He asked dozens of people from a brigade to check the addresses of thousands of people... Just contacting them was exhausting. If he didn't complain, he wouldn't be able to complete the work.

Tao Lu frowned and asked, "How many people were in the village back then and are not here now?"

"There must be hundreds of people. There are fewer and fewer people in the village. This Fangxia Village is pretty good. There are some middle-aged people who stay in the village to contract land for orchards, engage in breeding or other things, or provide it to agricultural companies. To do things, young people still walk a lot, and some old people have to help take care of their children..." Liu Sheng said the difficulty, and the trouble on his forehead.

It was originally an ordinary job, but after the number of people increased, this job was no longer ordinary.

Contacting hundreds or even thousands of people, confirming their addresses, and trying to call them back. If they really can't be called back, they have to send people to the local area to inquire... Just thinking about these things makes people's scalp numb.

Tao Lu thought for a while and said: "If we remove the elderly, there will still be minors..."

Jiang Yuan sat on the other side of the table. He coughed twice and said, "You can't screen like this. Whether you were in the village or not depends entirely on the records of the police officers involved. I looked at the record sheet and it was also the police record of the Liugouyan police station." Yes, this is hard to accept."

Tao Lu was refuted, but he didn't feel uncomfortable and simply said: "That's true."

In fact, there are still cases of secretly entering the village. If you want to prove who was in the village that day, you can still play this at the current stage of the case - when there are conflicts or doubts, you can at least verify and inquire. Now more than two years have passed, and you can only It all depends on records, and records are unreliable...

Jiang Yuan didn't use his emotional intelligence on Tao Lu. We still had to cooperate with 9 corpses, so he said directly: "The elderly and minors cannot be screened out. I saw the photos of the corpses. The murderer used an arm-length one." The ax has a very long force arm, and depending on the position of the hand, even if used by an elderly person or minor, it is powerful enough to smash the victim's head and face."

Jiang Yuan glanced at Tao Lu and saw that he could accept it, so he continued: "The elderly people in Fangxia Village have been working as farmers for a long time and are strong. Even if the men are in their fifties or sixties, they can kill the victim's family with an axe." , and got similar wounds."

"As for minors... minors nowadays grow very fast. At the age of 14, they may be 1.8 meters tall or 180 pounds. It cannot be excluded."

Tao Lu spread his hands: "Does that mean you have to face the whole village? This is a big project."

Comparing footprints is a simple matter. The question is, how can we compare when we are outside?

Let the other person take a photo of their footprints? It seems pretty smart, but in theory it's illegal.

When facing a murder case, the safest and most legal method is to call and ask for the other party's address, and carefully invite the other party back to the village. If not, send someone to the local area to collect evidence. Including footprints, it is most normal for the police to take them themselves.

This was what Liu Sheng was complaining about. If the work could be completed, he wouldn't have to call too much, but it was obviously a job that couldn't be completed. If he didn't call, the case would be delayed with him.

Jiang Yuan smiled and said, "You are still worried about doing useless work."

This is also a situation Jiang Yuan often encounters. Commanders are faced with numerous clues, and it is impossible to devote all their efforts to every clue. Saturation investigation sounds cool, but it is not cool when the bills are drawn.

This case has just been restarted, and Tao Lu certainly cannot send out all the reserve teams at this time.

But Jiang Yuan is different. The conclusions Jiang Yuan analyzes are often backed by high-level skills.

Therefore, from Jiang Yuan's perspective, this input-output ratio is relatively good.

Just a footprint identification, there is a certain trust gap between the two parties.

Tao Lu's idea was exposed. He laughed and didn't take it seriously at all. He said, "Just have confidence. In this case, you are the main one!"

He had given all the advance payment to Huang Qiangmin. If he didn't believe Jiang Yuan at this time, it would be like selling himself.

Jiang Yuan nodded and said: "Then let's target the whole village, including the victim's relatives, according to the list in the address book. Then, we will assign these people in order and investigate them one by one. "

Liu Sheng breathed a sigh of relief and said: "That's pretty much it. It works. Who will be selected in the first wave? The victim's relatives living in the village?"

"The footprints in the house have been trampled to pieces. Too many people have entered and exited, and some villagers have entered later. But to sum up, I can still draw some ranges...height is over 165 centimeters, male, and weighs over 130 kilograms. Right-handed, with a close relationship with the victim, able to enter the bedroom..."

Jiang Yuan has already used skills such as footprint identification, tool identification, and blood stain analysis this time.

Liu Sheng didn't understand, but he was very excited and couldn't help but said: "In this case, the number of people can be reduced a lot."

"It's just the first wave. If we don't win, the number will increase." Jiang Yuan can't guarantee that the murderer must not have the ability to counter-reconnaissance, or that he counter-reconnaissance by coincidence.

It's just that the scale of the current investigation is still small and cannot arouse Jiang Yuan's nervousness.

A little late, meow meow meow~