Xiao Yi was slightly stunned, and then listened to Xu Jing continue: "When I investigated Zheng Shouyan's case before, I told you that this kind of serial murderer refers to a murderer who has committed many crimes in a row and killed multiple victims, and he will have certain rules and hobbies in his actions, and these rules and hobbies will not be easily changed, especially the frequency of their killings and the way they kill.

If there is a change in the circumstances of their crimes, it is very likely to be related to their personal changes in life or psychological changes, for example, Zheng Shouyan suddenly accelerated the speed of killing, because he found out that he was suffering from thirst and knew that his life was short, so he couldn't suppress his desire to kill at all. ”

Although Xu Jing is a forensic doctor, she often cooperates with people from the public security organs to investigate cases, and at that time, a department she often cooperated with had a very good expert on psychological crimes.

Xiao Yat quickly understood what she meant, "This smile killer came out after a year of hibernation, not only did the time between each crime be shortened, but the method of killing people also changed significantly. ”

"Yes, and this change is not ordinary, if the cases he committed in the first two years can be classified as rape and murder cases, the cases he committed later are simply torture and murder cases."

Xiao Yat couldn't help asking: "What's the difference between these two kinds of cases?" ”

In his opinion, these are all murders, but the latter's methods are more cruel.

Xu Jing thought for a while and said, "The murderer of rape and murder usually commits the crime for sex...... Ahem, to put it simply, he has a desire for a woman, so he commits a crime, but most of the murderers in the murder case focus not on the woman herself, but on the ...... Mistreatment of the perpetrator himself, having a relationship with the victim, is generally only incidental to such perpetrators. ”

In some serial homicides, the perpetrators are even sexually impotent or disdain to have relationships with their victims, because in their hearts, the torture of the victim is far more attractive than the victim itself.

Rao is Xiao Yi is not the first time to discuss the case with Xu Jing, and it is not that there has not been a case of a woman being raped before, at this time, seeing her talking about the relationship between men and women so calmly, there is still some indescribable subtlety in her heart, and she can't help but clear her throat and say: "So you think that the murderer is likely to have some major changes, so there are these changes?" The time of his major change is likely to be in the year when he suddenly disappeared. ”

Xu Jing still felt that something was not right.

Only nowadays, the most likely answer is indeed this.

She muttered, "It's also very intriguing that the murderer suddenly disappeared for a year. Judging from the fact that he continued to come out to commit crimes, his desire to commit crimes did not subside, why did he suddenly stop in the fourth year of the Jubilee? I tend to think that he was unable to commit the crime because of something, or maybe that thing contributed to a major change in his style of committing crimes. ”

There are too many reasons why the murderer suddenly did not appear - he was sick, he left Xijing for something, he actually killed someone but the government did not find out, and it is even possible that he committed some crime and was arrested and put in prison, so he could not commit the crime......

Based on the information she had so far, she couldn't draw an accurate inference at all.

Xiao Yi looked at her quietly, and seeing that she was thinking about it, he couldn't help but whisper: "If you care, I will ask people to bring all the files related to this case, you have to wait for Changxiao to get out of class, before that, you can take a look at the relevant files." ”

Xu Jing's eyes couldn't help but light up.

She was already worried about what to do during the long laugh, but now she didn't have to worry about it.

Seeing her like this, Xiao Yi couldn't help but smile lowly, and found another attendant and asked him to bring all the files related to this case.

After a while, the two attendants who had just left came over with two small mountains of dossiers on trays and placed them on the table.

For such a big case, there must be a lot of relevant information, Xu Jing picked out the corpses of the five victims from it, and looked at it quietly.

Xiao Yi glanced at her, sent someone to bring a plate of snacks, and then picked up a file, opened it and looked at it carefully.

For a while, the small pavilion was so quiet that only the sound of the wind blowing the leaves, the sound of the servants walking in the distance, and the occasional sound of koi jumping out of the water in the pool on the side, the early autumn weather was dry but comfortable, and the occasional wind blew on the body, as if the gentle hands of a mother gently caressed the child's body through the golden sunshine.

At a moment, Xu Jing unconsciously raised her head, and was slightly stunned when she saw the man opposite who was rarely relaxed on the back of the chair, holding the file in one hand and gently rubbing the tea cup on the table with the other.

I don't know since when she could ignore the influence of the original owner's memory and look at this place and the man in front of her with a calm mind.

As if sensing Xu Jing's gaze, Xiao Yi suddenly raised his head, looked at her quietly with a pair of deep black eyes, and said, "What's wrong?" ”

Xu Jing pressed the inexplicable thoughts in her heart, shook her head and said: "I have read the corpses of these victims, and it is indeed as Xiao Shilang said, the tragic situation of the last three victims when they died is not comparable to the first two victims, but the injuries on their bodies also have certain rules, such as burns, stick wounds and bare hand injuries on their bodies are distributed in similar locations, fingernails and toenails are all peeled off, and it is judged that the murderer was peeled off with tools such as pliers. and the skin on the chests of the three victims was torn off by life. ”

The most cruel thing is that those injuries are clearly pre-mortem injuries, that is, when the deceased was tortured, it was conscious.

After a pause, she said: "I also thought about a possibility before, whether the last three deceased will be like Wang Wuniang, someone else imitates the smile killer to commit the crime." ”

Xiao Yi looked at her and asked, "Then do you think it's a copycat?" ”

"No," Xu Jing shook her head, "I compared the stitching techniques of the red threads on the mouths of the five victims, their techniques and the appearance of the stitches are similar, the murderer is obviously proficient in needlework, the needlework is very fine and neat, which is difficult to imitate."

Men who are proficient in needlework are rare, and I think this can be used as a breakthrough point in future investigations. ”

This also highlights how clumsy the imitation of the murderer of Wang Wuniang is.

The stitches on the corners of Wang Wuniang's mouth are messy and rough, and at first glance they are not the techniques of a smile killer.

It's just that, in addition, she can't see any other clues in the corpse for the time being.

She couldn't help but look at the other files, and just as she was about to pick up the other files, Xiao Huai'an's excited voice came, "Auntie, Daddy!" I'm out of class, and Mr. Wen said that my handwriting today has improved again! ”

Xu Jing was slightly stunned, an hour passed like this, too fast, right?

She could only suppress her impatient thoughts for the time being, stood up and hugged Xiao Budian, who rushed over.

Xiao Yi couldn't see her thoughts, and filled her with a cup of tea, as if casually: "If you want to continue watching, you can stay for a while, I have nothing to do today, if you have something to go back, you can also come to see it when you have time in the future." ”

Xu Jing was somewhat regretful, but she also knew that these files belonged to the private documents of the government, and it was impossible for her to take them home, so she thought about it and said, "I have something to do when I go back, and I will come back when I have time." ”