Song He's words made Dong Chuan happy. Apparently he had found the key clues to the case, and he quickly urged, "Then don't hide it, tell me quickly."

Song He was unambiguous and handed the report directly to Dong Chuan and said with a smile, "Actually, Mr. Shen and I made a trick. We started with the last few people the deceased had contact with before his death, simulated the psychological activities and behavioral characteristics, and then found

Convict the criminal."

This was a murder case that happened two years ago. The victim was a middle-aged man who owned a well-received local hotel. Three days after his disappearance, his family called the police. Five days after his disappearance, his body was found in a garbage dump.

Unfortunately, many parts of the body of the deceased were severely chewed by wild dogs when he was discovered. In addition to determining the identity through biological information, no matter how hard the forensic doctors tried, it was difficult to determine the cause of death. They only ruled out poisoning.

Based on the information left on the remaining remains, it is estimated that the deceased died three days after his disappearance, which was basically the same day as the time of reporting the crime.

At the same time, due to the harsh environment of the garbage dump, no monitoring, and disorganization, it is extremely difficult to restore the scene. It can only be determined that it is not the scene of the first crime, that is, the deceased was murdered and then moved to the garbage dump for dumping the body.

As for the rest of the information and traces, it can be said that there is zero gain.

So the police investigated the communication records of the deceased and the people he came into contact with during his lifetime, and found that there was nothing unusual in the communication records, but among all the people under investigation, five people were suspected.

These five people were the deceased's lover, the deceased's daughter's classmate, the friend who borrowed a large amount of money from the deceased, the deceased's dentist and a shareholder of the deceased's hotel.

Unfortunately, it is difficult to proceed with the investigation once it reaches this point. It can be said that everyone has a motive for the murder, but the key evidence has never been found, which has led to a delay until today.

"According to Mr. Shen and I's analysis, the murderer must go to the garbage dump to dump the body, so the principle of material exchange must apply. Since there is no way to find clues from the garbage dump, we can only find them from people."

"Moreover, the murderer committed the murder on the third day after the deceased disappeared, which means that the deceased was hidden by the murderer in a certain place before his death, and this place is most likely the scene of the first crime."

"According to the police investigation, all the suspects' residences, except the deceased's home, have no remaining biological information of the deceased, so this hiding place cannot be the suspect's home."

"It is precisely for this reason that when the murderer is in a hiding place, he will inevitably follow the principle of material exchange."

Dong Chuan had been reading the analysis report while Song He was talking, but found that his eyes were not as fast as Song He's mouth, so he only looked at the results and then raised his head, listening to Song He's explanation with some confusion.

Song He smiled upon seeing this and continued, "I believe that you, Team Dong, must have conducted a very detailed investigation at that time. If there are relevant clues, you will definitely find the scene of the first crime and determine the identity of the suspect."

"However, the relevant investigation information is very detailed, but nothing suspicious has been found. Therefore, Mr. Shen and I concluded that the murderer has corresponding counter-inspection capabilities, knows the principle of material exchange, and erased the traces left behind after committing the crime.

."

"So, we conducted a personality analysis on each suspect you investigated, sorted out everyone's behavioral patterns, and then conducted simulations. On this basis, we summarized the impact of the psychological exchange principle on each person through the material exchange principle.

."

People from Dongchuan didn’t know how to ask about the “Principle of Psychological Exchange”

Song He shrugged and said, "Mr. Shen and I made a joke about the name. It actually means that the murderer will leave psychological traces when he committed the crime at the first crime scene and when he dumped the body in the garbage dump. This is no matter what."

Something that cannot be eliminated.”

"These effects will bring about changes in the murderer's behavioral habits in his daily life after committing the crime. This is why we need to analyze and simulate the psychology and behavior of everyone."

Dong Chuan joked in disbelief, "Have you already begun to engage in this kind of metaphysics when analyzing the case?"

Song He couldn't help laughing and said, "Captain Dong, are you trying to laugh me to death so you can dissect my brain?"

Gu Li on the side laughed, knowing that Dong Chuan saw the result of the case and felt relieved. He wanted to tease Song He, but he didn't want to be teased by Song He instead.

Dong Chuan laughed for a while and then said cheerfully, "Xiao Song, please continue."

Song He nodded and continued, "In fact, this principle of psychological exchange can be reflected in many aspects. For example, the means of transportation used by the murderer to transport the body to the garbage dump will 100% leave an impact on the murderer's mind."

"Imagine, if he saw similar vehicles frequently after committing the crime, he would surely think of transporting the body frequently, which would cause psychological changes."

"Once the psychology changes, the behavior will inevitably change, so in this case, the principle of psychological exchange is the key clue that can help us identify the suspect."

"And in order to make the writing clearer, we typed out each person's psychological analysis, all in the case analysis."

Dong Chuan nodded, "No wonder your analysis report is so thick. I guess it would take me a long time just to read it. You'd better tell me the results directly."

"That's OK." Song He said calmly, "Now we can basically confirm that the murderer is the deceased's dentist, because he changed a car three months after the deceased was killed."

"According to our analysis, the dentist took great care of his last car. And the data shows that in the seven years since he drove the car, the number of traffic accidents was in the single digits. The most serious accident was only caused by an inadvertent rolling away shortly after buying the car.

Scratch."

"However, such a car-loving and cautious person actually drove his car into a ditch three months after the incident. Including the extremely short time interval between the traffic accident and the purchase of a new car, everything was different from what he had done before.

The behavioral habits are very different.”

Following Song He's narration, Gu Li picked up the case analysis report and turned directly to the copy of the deceased's dentist. He saw that the dentist's various psychological analyzes were listed in detail. The logic was strict and easy to understand. Gu Li repeatedly looked at it.

nod.

However, at this time, Dong Chuan frowned slightly, "But without actual physical evidence, we have no way to convict him."

"This is indeed a problem." Song He nodded and admitted. "Mr. Shen said that if he investigated the case as soon as possible, the evidence should be found in the car and the first crime scene, but now he can only find a way to expose himself.

Already."

Dong Chuan nodded and said, "Understood, we cannot leave all the problems to Shen Lailai. This kind of actual investigation should be left to us."

Song He said curiously, "From what Captain Dong said, there is already a case."

Dong Chuan smiled mysteriously, "I don't know much about the principle of psychological exchange, but since he has this psychological loophole, he can just take action in this regard."

Song He understood immediately and came up with two ideas, which immediately made Dong Chuan applaud him.

"By the way, Captain Dong." After talking about the case, Song He asked, "How is Chen Haoyu's matter?"
Chapter completed!