The professional quality of the male protagonist

"It seems that there is also a problem between the two families..." Zhang Xia sighed helplessly, with a somewhat complaining tone, "It's a bad start for the first case to be so troublesome."

"Let's stop here today, everyone go back and have a good rest, we will continue tomorrow." Ye Kai was also a little helpless, at first they thought it was just a simple murder case, which might involve domestic violence or vendetta, but now it is getting more and more complicated , They have been busy for three days, but they don't even know why they killed people...

They visited and investigated, searched for evidence and materials, and they did everything they could do, and they still stood still after taking over.

I have done everything that can be done, but now I haven't even determined a main direction of investigation. The superiors are still waiting for them to solve the case. The pressure is not only from this side, but also from the outside world. If the murderer cannot be caught in a day, They cannot let their guard down for a day.

If the murderer really killed aimlessly, the next victim may appear at any time.

Thinking of it this way, Ye Kai remembered one thing, "Aren't you good at psychological profiling, Li Yancheng? Do you have any profiling?"

Psychological profiling is different from ordinary investigation methods, and pays more attention to the application of knowledge in reasoning. These trivial things that are not very useful in their hands may have different functions within the scope of criminal psychological profiling.

Ye Kai studied in the police academy, and he knew about it, but he didn't specialize in it.

But the bureau chief deliberately transferred Li Yancheng and waited for half a year, so there was always a reason for him.

Ye Zhong knew about this. This group had been intending to set up half a year ago, but it had been procrastinating. It was not until Li Yancheng promised to come that it was formally established...

Zhang Xia and He Xiuwen who belonged to the same administration also knew a little bit, but they didn't know much about the specific situation.

Xie Wenyuan was surprised when he heard Ye Kai's words. It was the first time he looked at Li Yancheng squarely. He knew it, but it was the first time he saw Li Yancheng.

Xie Wenyuan used to be in charge of logistics work, mainly responsible for managing some files and materials and evidence of old cases, but that kind of place can be said to be a nursing home, where some policemen who are about to retire go back, and they enter the police station based on their relatives But Xie Wenyuan, who got a golden job in the database, has always been a laughing stock...

And judging from the information he knew in the past, criminal psychology profiling is considered rare in the bureau.

First of all, this is not a good job, and it requires years of accumulated experience. Most people have to go abroad to study system materials. Most people who take this road in China have accumulated a certain amount of experience and have chosen a more secure way of life. There are many professors in the police academy, but there are not many real guns in the police station.

Among the people Xie Wenyuan knew, there were only three or four people who learned this, and one of them died a while ago, and Li Yancheng was one of them.

"I don't know much." Li Yancheng said.

"Tell me about it." He Xiuwen said.

He Xiuwen has basically been on the field during this period of time. He is mainly responsible for crime scene investigation and data collection, so he has not been in the bureau for the past few days.

He Xiuwen is also participating in the investigation of this case, but he doesn't know as much about the other people as they do.

"Speaking of which, we have worked together before, and he is very good." Li Si said quickly.

Li Si can only say this after seeing it.

But others were noncommittal, but Li Yancheng completely ignored these people, and continued: "The initial suspicion is that the murderer is a male, about 1.7 meters tall, unmarried or divorced, and the murderer's method of assassinating the child is extremely extreme. Intense assassination. The other party acted purposefully, had made sufficient preparations, and was extremely familiar with the surrounding environment, so it is very likely that they are for those who live nearby."

After a short pause, Li Yancheng continued: "The other party is not tall and has an ordinary appearance. He probably knew the child. The child should have known him and talked to him before committing the crime. Judging from the way the other party attacked, the other party The action this time was ruthless to put the child to death, but the way he stabbed the child was not cruel. Although he stabbed the child multiple times, he hit the main point twice, and it was not completely disorderly. On the one hand It shows that the murderer has certain medical experience, and on the other hand, it shows that although the other party wants the child to die, he has no intention of venting his anger on the child."

Li Yancheng was about to continue talking, but Hu Xingfan on the side had already interrupted him, "These are just your guesses, what about the evidence?"

Li Yancheng glanced at him and continued his previous topic. He said: "I wanted to kill the child, but I didn't want to vent my anger. The way of stabbing the child mainly to hit the child's fatal point shows that the murderer should be an extremely rational person." People, something made him want to kill, but it also made him feel guilty about the child. So what I can know now is just a simple description of the character, and the appearance can only be roughly described. "

"The murderer is a male, about 40 years old, about 1.7 meters tall, unmarried or divorced, living alone, easy-going, very familiar with children, dotes on children or often plays with them. He should live near the community , and had contact with the victim's family." Li Yancheng said.

"But I remember that the information provided by our witnesses said that the murderer was a woman with waist-length hair and black and white stripes." Zhang Xia questioned.

Li Yancheng glanced at her and said: "The forensic report said that the wound penetrated the child's abdomen almost parallel. Although the abdomen is soft in human body structure, it is not easy to break. If you want to stab another person's abdomen with a knife in one hand, Moreover, it is not an easy task to be in the abdomen of a child who is much shorter than you, which tests the opponent's arm strength to a certain extent."

Under normal circumstances, it is easier for people to stab downwards, and it is easy to use force. It is not easy to stab upwards, and it is even more difficult to stab objects in front of them parallel to the horizontal line.

The child's height was about one meter. Comparing the height of an adult man with the height of a child, the child's abdomen happened to be a few inches above the adult's wrist.

Unless the child is lying flat on the ground when being stabbed, it is very difficult to use strength from this angle, because the arm cannot be fully bent, and the biceps cannot exert strength, so the child can only be stabbed with the strength of the forearm.

If it is a woman, the innate strength of the body should not be enough to completely penetrate the opponent's body, let alone control the direction of the knife's penetration at that time, so as to accurately stab the opponent's fatal point.

At that time, someone would come in the small alley at any time, and the murderer's actions would be exposed at any time. The murderer didn't have much time, so he had to be extremely precise with every step, which made it more difficult.

Li Yancheng's words were not unreasonable, and the others were not fools, so they soon understood what Li Yancheng said.

Hu Xingfan, who had been ignored by Li Yancheng once, asked patiently, "Then why do you say that the murderer knew the child, or had contact with him?"

Hu Xingfan originally didn't want to pay attention to Li Yancheng, but after what Li Yancheng said, Hu Xingfan was also a little shaken.

He didn't consider the height difference. As a tall and burly armed policeman, lack of force was never a concern for him, so he never considered whether a woman could accurately stab a child.

"Because I climbed up to the fourth floor to see it before. From the position of the window sill, I can't see the specific situation of the crime scene, but I can clearly see what kind of people are around. The area is full of people with children. Salary families, most of them have to get up to go to work at xx, and families with children get into trouble after [-]:[-].

"Is someone there?" Hu Xingfan repeated Li Yancheng's words.

He had also visited that area. The crime took place in an alley with walls on both sides. The alley was not long, only about ten meters long, and it was considered secret without doors and windows.

But Hu Xingfan didn't understand why there were people living in the house next to the laneway, which proved that the child had contact with the murderer.

Xie Wenyuan, who turned his head faster, had already understood. He looked at Li Yancheng thoughtfully, his eyes were a little shaken.

In his impression, Li Yancheng was not among the criminal mind profilers he knew, and although he had never met the other criminal mind profilers, he had heard of them more or less.And another policeman he knew who was doing the criminal psychology test was Fu Ziang, who had died in the execution of his mission.

Xie Wenyuan's previous job was file management. He managed some old cases and there were also some major cases. Although he had never met people like Fu Ziang, he had learned about some major cases.

But if Li Yancheng hadn't been told by Ye Kai before that Li Yancheng learned this, he wouldn't even know.

Before, Xie Wenyuan didn't understand why Li Yancheng climbed to such a high place. If Li Yancheng really suspected that person, Zhengda could send someone up to check it, and there was no need to take the risk himself.

But now he understood a little bit, some things he wouldn't understand if he hadn't seen it with his own eyes.

There is only a wall between the residents in the alley and the crime scene, and there is almost no sound insulation effect. If the child made any noise at that time, the people on both sides would be more or less impressed.

And if a child finds that the other party is coming towards him in a place where there are only two people, he will definitely run away screaming immediately.

But the child barely made any sound, which already showed that the child did not panic when he saw the murderer, and Xie Wenyuan would not have thought of any possibility if the other party was not an acquaintance.

Controlling guns and knives is indeed a danger for adults, and they may be too scared to make a sound, but the other party is only a nine-year-old child. A child will probably only be scared when he sees the other party pull out a knife and walk towards him. yell.

Xie Wenyuan, who didn't like Li Yancheng at first, fell into deep thought. At first he thought that Li Yancheng was just a newcomer who acted recklessly.He was asked to rummage through the garbage before, but he was lazy and did nothing, which made Xie Wenyuan's impression of Li Yancheng extremely bad.

Later, Hu Xingfan expressed in school that he didn't like Li Yancheng's hints, so this made Xie Wenyuan also dislike Li Yancheng a little bit.

But judging from the results, what Li Yancheng did before was not reckless, but had his own clear purpose...

If all of Li Yancheng's previous actions had their own purpose, then on the contrary, his willful and reckless behavior was unreasonable.

Xie Wenyuan blushed, staring at Li Yancheng in embarrassment.

He couldn't say an apology, not to mention he was still a little unconvinced, but he already knew that he was making trouble for no reason, so his eyes were wide open, and Xie Wenyuan's neck turned red.

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