Detective: Open your eyes, I am handcuffed in the interrogation room

Geng Jianqing came to the city bureau faster than Chen Yi expected. At this time, the comprehensive autopsy had not yet been completed, and surveillance was also under investigation. Cai Wenwen's family was still on the verge of collapse.

It is the most unacceptable thing for a person with white hair to give a person with black hair. Cai Wenwen's mother almost fainted and did not want to believe that her daughter, who had been with her for twenty-seven years, would die suddenly and commit suicide.

The feeling of disaster from heaven is like a thousand arrows piercing the heart, and you will not be able to let it go until your death.

Chen Yi has seen a lot of life and death in the past few years. All he can do is try his best to catch the murderer and bring him to justice.

"Geng Bureau!"

Seeing Geng Jianqing appearing alone in the case handling hall, all the police officers stood up quickly and stood at attention to salute.

This is a legend in the police force, deputy bureau of the Imperial City Criminal Investigation Bureau, and first-class police supervisor. He can be called the idol in every criminal policeman's mind and the target of his dreams.

When the other party suddenly came to the detachment, everyone was surprised, full of surprise and fear.

Geng Jianqing held a document in his hand and looked serious. He must have finished reading Ning Cheng's case. He nodded and told everyone to continue working, and then walked to Chen Yi.

Chen Yi was still looking at the whiteboard in front of him. The words on it had not increased, there were still only six.

Cai Wenwen, Bi Xuelan.

"Geng Bureau." Chen Yi turned around.

Geng Jianqing stared at the whiteboard for a while and said, "You know I'm coming?"

Chen Yi: "Yeah."

Geng Jianqing: "How old is the victim?"

Chen Yi: "Twenty-seven years old, unmarried."

Geng Jianqing: "Where's the trauma?"

Chen Yi: "There are no external injuries, his clothes are intact, and the autopsy results have not been released yet. For the time being, it can be concluded that he was not sexually assaulted."

Geng Jianqing: "What type of murder weapon?"

Hearing this, Chen Yi picked up a marker and drew the general shape of the murder weapon on the whiteboard.

Seeing this sharp tool for killing people, Geng Jianqing took a deep breath and said slowly: "Like Imperial City, like Ningcheng, this is a series of murders."

A serial case is a serial case, with different names and the same meaning.

Chen Yi nodded, and the case could be merged for investigation.

Geng Jianqing: "I just discussed with Lao Fang. If it is a series of murder cases, a 405 task force should be set up. He must be found this time, otherwise new victims are likely to appear in two years."

Chen Yi: "405? Were the victims in Imperial City killed on April 5th?"

Geng Jianqing: "Yes."

Chen Yi: "Qingming Festival?"

April 5th is not necessarily Tomb-Sweeping Day, it may be the 4th or the 6th.

Geng Jianqing: "Qingming Festival."

Chen Yi: "I remember you said before that the victim died in the cemetery. Is there any relationship between the two?"

Geng Jianqing replied: "Yes, the victim's brother died of illness and was buried in the cemetery at the crime scene. She was probably killed when she went to sweep the grave."

Chen Yi thought for a moment and asked, "Since it's a grave sweep, why didn't the victim's parents go?"

Geng Jianqing: "You reacted very quickly. This is a suspicious point in this case. On the day of the incident, the victim and her parents had already visited the grave once in the morning. The victim was killed in the afternoon, so she went there again. "

"As for why she went to the cemetery for the second time, her parents could not give a reasonable explanation. They could only think that she missed her too much and couldn't help but go back to take a look."

Chen Yi: "In this case, the victim Cai Wenwen also has a younger brother who is in college. Where is Ningcheng?"

Geng Jianqing: "There is no such thing in Ningcheng. The victim Bi Xuelan has two sisters."

When Chen Yi fell silent, there was no common ground. The common ground required all three.

The characteristics in front of me now are only those of a woman in her twenties to thirties, and the others are unknown at the moment.

"Do you have any clues here?" Geng Jianqing asked.

Chen Yi: "The case was still under investigation not long after the incident. The victim's family members were already in the team, so we didn't start asking questions. We needed to wait until they calmed down."

Geng Jianqing waved his hand: "Let's talk somewhere else."

Chen Yi: "Okay, go to my office."

The two came to the detachment leader's office. Chen Yi poured a cup of tea for Geng Jianqing and handed over the cigarettes.

Geng Jianqing took it and lit it, and the smoke rose, covering his deep eyes, where there was a calmness and composure tempered by years.

To a criminal, this look is sharp and oppressive.

"The files from Imperial City haven't been sent over yet, let's take a look at Ning Cheng's first." Geng Jianqing pointed to the files on the table.

"Okay." Chen Yi nodded, picked up the thick document and looked through it.

He read quickly and focused on the investigation activity materials, including investigation reports, investigation transcripts, inspection transcripts, etc., which are the most important components of the criminal files.

While Chen Yi was learning about the Ningcheng case files, Geng Jianqing was not idle and said: "In most series of cases, the suspects have common psychological characteristics, such as loneliness, inferiority complex, anger and indifference, etc. These characteristics are The probability of it being formed in childhood is extremely high, and abuse factors account for a high proportion.”

"Judging from the Imperial City case and the Ningcheng case, the murderer has an extremely calm personality and a high degree of planning. The targets he chose were all young women between the ages of 20 and 30, but there was no abuse or sexual assault, indicating that he did not attack Sexual personality disorder can basically rule out antisocial criminals.”

Chen Yi was multitasking, listening to Geng Jianqing's words and looking through the files.

Geng Jianqing continued: "Let's start with the criminal population as a whole. Among the criminal population, 40% have dangerous personalities, and 60% have dangerous mental complexes. Dangerous personalities are divided into innate and acquired. Innate It is anti-social, which has been ruled out just now, and acquired criminal personality and defective personality formed through experience."

"Dangerous knots include intentional knots, cognitive knots, and complex knots."

"I haven't found anything in common between the Imperial City case and the Ningcheng case. Chen Yi, which one do you think the murderer belongs to?"

Chen Yi: "Of course it's a personality defect or a dangerous mental knot."

Dangerous knots are an important topic in criminal psychology. The knot is the cover-up of crime, the knot is criminal paranoia, and the complex is the randomness of crime.

The dangerous knot of knowing is that the suspect is very cognitively paranoid. He thinks that something is wrong, and he also thinks that the victim is wrong. He is paranoid about looking for the rationality of his behavior.

In a series of crimes committed by acquaintances, the victims often have a high degree of similarity in characteristics, such as the same occupation, the same behavior, the same hobbies, etc.

For example, if a person with a mental disorder suspect hates doctors, then the targets of his crimes will all be doctors; if someone hates domestic violence, then the targets of his crimes will all be domestic violence perpetrators.

Suspects with complex psychology are lonely and introverted, and the process of committing crimes is abnormal. The abnormality mentioned here does not mean the brutality of the crime, but the unreasonable motives. The victims are often very innocent, and are highly similar to anti-social psychology.

Chen Yi prefers the "Yijie" type because the victims in the "Yijie" series of crimes have no obvious similarities and the motives are difficult to analyze. This is the cover-up of "Yijie" crimes.

It's not active cover-up, but passive cover-up.

For the suspect, he has the necessary reason to commit the crime, but for bystanders, this reason may be difficult to understand and very incredible, so it is difficult to figure out.

Since Geng Jianqing said that he did not find anything in common between the Imperial City case and the Ningcheng case, then the most likely possibility is a psychological connection.

A college student, a stay-at-home mother, and a bank employee, except for the same gender and similar age, nothing else is compatible.

Therefore, the murderer's motive is very secretive and not easy to find.

Geng Jianqing nodded: "I think so too. If the cases in Imperial City and Ningcheng cannot be related, then it will be difficult to gain anything from the murder case that just happened in Yangcheng."

Chen Yi asked: "Uncle Geng, has the type of murder weapon in the Imperial City case been locked?"

Geng Jianqing: "No."

Chen Yi: "Do you have any suspicion?"

Geng Jianqing: "There is indeed a scraper, a scraper used for oil painting, because the victim studied art in college. During the investigation, we found that the scraper was very similar to the murder weapon with only minor differences, but the scraper was used to kill people. If it doesn’t kill someone, it can’t even cause stab wounds.”

Hearing this, Chen Yi subconsciously browsed forward. Geng Jianqing saw it and said, "No need to look for it. Bi Xuelan doesn't know art. If you really want to go further, only her daughter Zhou Yumeng is learning painting, but she is not studying oil painting. If this is The connection is too far-fetched.”

Chen Yi paused, it was indeed far-fetched.

"What do you think?" Geng Jianqing asked.

Chen Yi spoke: "There is no targeted occupation and no targeted fault. From the motive of committing the crime, it can only be robbery."

Geng Jianqing: "No sexual assault, no financial loss, what is plundering?"

Chen Yi put down the document in his hand: "I wish I knew, Uncle Geng, the geographical span is also a very important clue, which gives us a basis for profiling the murderer."

Geng Jianqing agreed: "Yes, the first murder case was in Imperial City, the second murder case was in Ningcheng, and the third murder case was in Yangcheng. We have not locked the suspect, so there is no possibility of the suspect escaping. He appeared in There must be reasons for different cities.”

Chen Yi followed the train of thought and said, "For example, his career requires him to travel all over the country."

Geng Jianqing nodded: "Well, there is also the crime cycle. There is a motive that drives him to kill within two years. After the time to kill, he will look for targets in whichever city he happens to be in."

Chen Yi: "The basis for identifying targets is young women. If we narrow the scope further...it seems that it can only be based on behavioral characteristics."

Geng Jianqing: "Looking from the files, I did not find that the victims in the Imperial City and Ningcheng cases had the same or similar behavior."

Chen Yi: "We speculate that the murderer's motive is secretive, so it is definitely not easy to find the motive. At least it is not visible on the surface and requires in-depth analysis."

Geng Jianqing: "We will discuss this issue after your detachment has fully investigated the current case. If there are any major discoveries during the process, please call me at any time. By the way, there is one more thing."

Chen Yi: "Uncle Geng wants to say... is the Imperial City case the first case?"

Geng Jianqing's eyes showed appreciation: "Yes, this matter needs to be implemented. Until the murderer is caught, we have no way of knowing how many people he killed."