National Forensic Doctor

"Is there a backlog of murder cases? Which case?"

When Tao Lu heard the type, he immediately became interested. Even though he knew that the backlog of murder cases would cost money, and asking Jiang Yuan and the others to do it would cost a lot of money, he was willing to spend the money, and he was very happy to do so.

For any police station, solving the backlog of murder cases is like a mission. Once the investigation is completed, another piece of the puzzle of the mission is added.

Jiang Yuan hesitated for a moment and did not talk about the case immediately. Instead, he took a vaccination first and said: "I'm not sure yet. I just had an impression when I checked the fingerprints. Although I won the match later, it was also a incomplete fingerprint. , and it is not a decisive fingerprint, so it is still doubtful whether the case will be officially opened.”

Jiang Yuan said, and then explained: "I may need a day or so to confirm. In addition, I may need to find relevant people in the case and interrogate the people involved. So let me tell you in advance."

Jiang Yuan said this in one breath, and not only Tao Lu, but also Song Tiancheng's expressions began to become particularly solemn.

This was Jiang Yuan. He didn't even say so many words when deciding whether to take on the Duanda Group case. Looking at Duanda Group again, the stock price has now increased by 20%...

"Which case?" As Tao Lu asked, he had already begun to build a protective wall in his heart.

"Jianmenyuan Murder Case." Jiang Yuan honestly stated the name of the case after completing the psychological training for the two leaders.

Interpols like to keep secrets in their hearts, but the secrets shouldn't be too big, as they can lead to death.

Tao Lu and Song Tiancheng looked at each other, and immediately turned their gaze away. They each withdrew their eyes, unwilling to reveal their inner thoughts.

"Are you... sure about this?" Tao Lu felt that his mind was all messed up today. Earlier, Jiang Yuan was talking about Zhang Weili, but he couldn't remember who it was. Now when Jiang Yuan was talking about the Jianmenyuan murder case, he was so obsessed with remembering who it was that his language organization ability was paralyzed again.

The Jianmenyuan murder case was a murder case in the late 1990s. Jianmenyuan is the address, which is nothing unusual. The core lies in the identity of the nobleman who was the victim of the murder.

Jiang Yuan thought for a while and said: "I am 90% sure that the fingerprint is correct. I can go back and study it more carefully. But..."

"The fingerprint comparison is successful, so the case may not be solved!" Tao Lu opened the window paper with just one sentence.

Jiang Yuan nodded: "Indeed."

Tao Lu frowned even more tightly than before.

Song Tiancheng's expression was not good-looking either.

How to solve a case that has been backlogged for more than 20 years?

In fact, after all, there is a fixed pattern, or in other words, fixed preconditions for the detection of old cases.

The first point is to make new discoveries. There are three most common new discoveries. One is the new technological revolution. For example, the development of DNA technology has solved many old rape cases and greatly reduced the incidence of rape cases.

The second type is accidental income. The most common ones are those who pull out radishes and bring out the mud. Companions donated by various criminals for meritorious services, etc., all fall into this category. The fingerprints Jiang Yuan found this time are also of this type.

The third type is the investigation of family members or related persons. The rape and murder case of Nan Medical University reported on the Internet was the suspect found by former classmates through multiple comparisons. In addition, the advancement of the Tsinghua Zhu Ling case also relied on the efforts of the victim’s university classmates.

But among the three prerequisites, the riskiest is accidental income.

Because what is occasionally obtained is often not conclusive evidence. Most of the time, what the police get are clues, and they need to find ways to find evidence.

Especially this kind of case that has been backlogged for 20 or 30 years ago. There is no evidence and just someone's mouth. The risk to the suspect is too great and it will be a huge threat to the entire society.

If you could convict someone with just one open mouth, no one would have an enemy they hated all their life, and no one would wait for a chance to die.

It is very common for the general murder case backlog to be restarted when there are clues.

But the risk of homicide in Jianmenyuan is not that great.

Tao Lu couldn't help but said: "Jiang Yuan, if this is the case, I don't recommend restarting the project. At least, it can't be restarted directly."

Jiang Yuan was not surprised, he just raised his head and glanced at Song Tiancheng.

Song Tiancheng's expression did not change, as if he had not heard anything.

Tao Lu emphasized: "I know you are confident, but this is not just about solving the case. I will tell you a story and you will understand. You may not have thought that there was no key suspect in the Jianmenyuan murder case from beginning to end. The criminal investigation team did not arrest any suspected suspects.”

Jiang Yuan couldn't help but sit up straighter.

To be honest, it is possible that such a case could not be solved, but it is very abnormal to not even have a key suspect.

Especially when there is no breakthrough in a case for a long time, it is more likely to happen that a large number of people are arrested and interrogated intensively or something else is done to obtain clues.

Jiang Yuan has often used similar plans. He arrested some relevant criminals and obtained clues through contacts between prisoners. Moreover, whenever he used this plan, he used it extensively.

"Weren't there any investigations into the Jianmenyuan murder case?" Jiang Yuan was quite surprised.

"There was a small-scale investigation, but not a large-scale investigation. There were not enough clues at that time." Tao Lu said solemnly: "There were generally a lot of homicides that year. The victims'... family members, We propose not to disturb the people, and we cannot start a massacre of the whole city because of this.”

Jiang Yuan: "The key is what the police think. If the police need a large-scale investigation, can't they do it?"

"Of course it can be done." Tao Lu said softly: "There was indeed no basis for a large-scale investigation at the time, but for a case of this level, obtaining clues through investigation is also a strategy. But at that time, this strategy was rejected."

"What was the opinion of the task force at the time?"

"I don't know the specific situation, but given the conditions at the time, a large-scale investigation should not be of much help, but no matter what, the task force did not exhaust all methods after all!"

Song Tiancheng saw that they were talking to this point, and then said: "I agree with Tao Zhi's point of view. At that time, the victim's family was very restrained. Of course, the police also investigated as much as possible and invested a lot of resources. However, we need to maintain the emotions of the victim's family. We cannot rashly restart the project. That will be a second injury to the victim's family and will not be conducive to our work."

"I understand." Jiang Yuan really understood. If this kind of case is solved and nothing is done, it is understandable. The case was not solved, and all means were not exhausted. It can only be said that the victim's family was very restrained.

In this case, if the police easily opened a special case and could not solve it or the investigation took a long time, it would definitely be an unforgettable experience for the victim's family.

Considering the identity of the victim, the probability that he would laugh it off after you hurt him is not high.

"Then do a round of preliminary investigation first?" Jiang Yuan himself was also preparing to start a small-scale operation. Now it is nothing more than a procedural issue.

Tao Lu nodded immediately and said, "We can start with the interrogation. If you find the fingerprint of a suspect, bring him out separately first. You can use my people at will."

"Add them directly to my backlog team." Jiang Yuan said bluntly, "There must be a name. The people I bring with me are not familiar with the capital, so it is convenient to have local criminal police with them."

Tao Lu looked at Jiang Yuan deeply and said, "It's okay to add them to you, but you can't take them away."

"No, there are people who don't stay in Zhengguang Bureau and go to the countryside."

"Of course I don't want to go to the countryside, but Ningtai is different." Tao Lu said without hesitation, "Add whoever you like, I will slowly try Duan Da's case, and we will each be responsible for a part!"

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