After everyone found the clues and returned to the bureau, Sang Yunqing's autopsy report also came out.

"These bodies are the cleanest I've ever seen." Sang Yunqing handed the practice report to Shen Zezhi.

"Huh? Sister Yunqing, what does this mean? Guan Xin asked curiously.

Sang Yunqing continued: "The deceased did not have any injuries on his body, not even the binding injuries that are most common in kidnapping cases. ”

"But there is ether." Shen Ze's way.

Sang Yunqing said: "Yes, the victim had ether burns on her respiratory tract and throat, but her face did not. This is very uncommon. ”

Noriko said: "In other words, the murderer first stunned the victims with ether, and then immediately followed by a facial cleans. In case their faces are burned with ether? ”

Sang Yunqing nodded: "The deceased died within a few hours of being caught by the murderer, but the makeup on their faces was painted before they died." Because this is the only way to keep their faces that way after death. ”

Qi Kai asked, "What is the cause of their death?" ”

Sang Yunqing said: "TTX, commonly known as puffer fish poison. Puffer fish, commonly known as puffer fish, is an alkaloid contained in other organisms. It was once considered the most toxic non-protein toxin in nature. The deceased was given an arterial injection of TTX at a dosage of about 10 times the usual lethal dose. The deceased should have died within seconds of the injection. ”

Noriko said: "If you look at it this way, this murderer doesn't want these girls to suffer. ”

Shen Zezhi also said: "After the victim's death, he was given neat clothes, either because these clothes had a special meaning, or because the murderer felt guilty about the deceased." ”

Qi Kai said: "I don't think it's very likely that he feels guilty, these clothes should have some special meaning to the deceased." ”

Shen Zezhi walked to the analysis board with a map of the city and marked the last place where several victims appeared. As soon as the location was marked, everyone saw the unusual place. These places were on the streets close to the deceased's house, and they could almost see the door of their neighborhood. It is surrounded by bustling streets. But they were still stunned and taken away by the murderer under the noses of so many people.

Zhao Jiyong knocked on the folder and said, "The murderer should have a means of transportation." What means of transportation is inexpensive and inconspicuous on the street, and enough to hide a person? ”

Shen Zezhi said: "I checked Wang Danyang's clues today and thought of a possibility. These victims are all good students with excellent character and learning, and they all have one thing in common. It should be said that this commonality is shared by all students. That is, they will help others, whether they take the initiative to help others, or others ask them for help, they will not refuse. ”

The alley where Wang Danyang appeared last was not deep, and there was a bustling street outside. She didn't hesitate to walk in when she saw someone asking for help in the alley. ”

Ji Ziyue said: "If you can let a junior high school student approach unsuspectingly, then this person is not a threat in the eyes of these students." ”

Shen Zezhi nodded: "That's right, so you can appear continuously near the school and the victim's house without letting them notice, there is no threat in their eyes and they will be asked to lend a hand, and in the end, this person should have a transportation that is enough for one person." Who should this be? ”

"Road cleaner." Zhao Jiyong said. "They will never be noticed in the same place for several days in a row, and the streets of the city should be cleaned in fragments. Students are taught not to discriminate like adults, who are seen as weak and not dangerous. Street cleaners will be equipped with a three-wheeled garbage truck with bins. ”

Shen Zezhi said: "Guan Xin, go check a few of the cleaning workers assigned near the victim's school or community, and cross-compare them to see if there are any duplicates." ”

Sang Yunqing said: "I have seen the plastic box used by the murderer to put the body of the deceased, and the box has been sealed. And the clothes on the body of the deceased. The stitches were rough and most likely sewn by the murderer himself. ”

Shen Zezhi: "According to the clues we have now, I think the murderer should be a man between 30 and 40 years old, with a figure of about 1.7 meters and a simple appearance. It is likely that he was engaged in urban road sweeping, and that he had worked at sea himself, or that someone in his family had done so. He is likely to live alone, has recently experienced the death of a close relative, and has dependent personality disorder. ”

Noriko said: "His safe area is Shibei District, so it is likely that he is from Shibei District, at least he has lived there for a long time." ”

"Team leader, what's dependent personality disorder?" Qi Kai asked.

It is a personality disorder characterized by obedience and attachment behaviors related to excessive need for care, and its main characteristic is excessive dependence on others. The dependent personality has an excessive thirst for closeness and belonging, which is compulsive, blind, irrational, and has nothing to do with real feelings. A person with a dependent personality would rather give up his personal interests and outlook on life, as long as he can find a backer and be satisfied with the warmth of others at all times. This way of dealing with the world of the dependent personality makes him more and more lazy, vulnerable, and lacks autonomy and creativity. As a result of the compromise, people with dependent personality disorder develop more and more feelings of depression that prevent them from doing something for themselves or having a personal hobby. "Shen Ze's way.

"The dependent personality originated early in human development. In his early years, the child cannot survive without his parents, and in the child's impression the parents who protect him, nurture him, and meet all his needs are omnipotent, and he must rely on them. At this time, if parents are too spoiled, encourage children to rely on their parents, and do not allow them to have the opportunity to grow up and be independent, so that over time, in the minds of children, they will gradually develop a dependence on parents or authority, and they will still be unable to be independent when they become adults. Lack of self-confidence, always rely on others to make decisions, can not afford to choose and adopt the responsibility of various tasks and work for life, and forms a dependent personality. ”

"Fairy tales are generally read by parents to their children when they are children. The deceased was dressed up as a fairy tale character by him, which shows that the murderer was eager to go back to that time. ”

Shen Zezhi nodded: "The cause of dependent personality is generally that parents overspoil their children, but it is unlikely that a murderer is as serious as it is in a family with sound parents." So the murderer is likely to be a single-parent family. The imperfection of the family can lead to the murderer being ostracized outside the family as a child, when his only relatives are all he has. However, this condition generally decays with age. Dependence on family members will be minimized during the rebellious period of adolescence. But the murderer clearly did not go through this stage, and his dependence on his relatives has become more serious than less. It is likely that his only loved one left him as a child. ”

Qi Kai said: "So, the murderer may be an orphan?" ”

At this time, Guan Xin also had results: "Team leader, I checked the staff database of the City Management Bureau, but there was no result. According to the registered information, there are no duplicates of street cleanliness in the vicinity of these schools and several neighborhoods. And they have only one person registered on one street. ”

Qi Kai said: "This is not right, a street with so many shops, one person will definitely not be able to do it." ”

Zhao Jiyong said with a smile: "Of course one person can't do it." The register of the Urban Management Bureau is full of staff. In fact, most of the cleaners are contractors. These contract hours will not appear on their register. ”

Shen Zezhi said: "Qi Kai and Teacher Zhao went to the Urban Management Bureau to try to find this person. ”

Zhao Jiyong and Qi Kai immediately set off.

Ji Ziyue looked at Shen Zezhi and waited for him to assign tasks.

Shen Zezhi said: "Let's start from the murderer and see if we can find clues from several deceased." Yun Qing investigates the clues left by the murderer on the corpse. ”

Sang Yunqing said: "Okay." ”

Guan Xin looked at Shen Zezhi and asked, "Team leader, what about me?" ”

Shen Zezhi thought for a while: "You go and check if there are any people in all the welfare homes in the city who look like the murderer we speculated." ”

"Yes, guaranteed to complete the mission." Guan Xin said mischievously.

Shen Zezhi was amused by her.

Seeing that it was getting dark, maybe the murderer was going to do it again, but so far they haven't even found the shadow of the murderer. Tonight is destined to be a sleepless night.

Shen Zezhi and Ji Ziyue went through all the clues of the victims, but they found nothing. There is no connection between the girls.

So on what basis did the murderer determine his target? The murderer is obsessed with the fairy tale "Daughter of the Sea", and all the dead are dressed up as a mermaid princess. Then the appearance of these girls should be in line with the appearance of the mermaid princess in the murderer's heart. But "Daughter of the Sea" is a foreign fairy tale, and the mermaid princess in the murderer's mind should not be these yellow-skinned and black-haired medieval girls.

And why did the murderer go on a killing spree at this time. Why did she kill these girls? Is there anything special about the mermaid princess?

Noriko thought about it for a while, and he said, "According to fairy tales, the mermaid princess is 16 years old before she can go to sea to see the outside world. Moreover, they are born without a soul, and they can only live to be 300 years old by doing good deeds all their lives, and after they die, they can have souls and ascend to heaven. ”

Shen Zezhi: "That is to say, as they get older, their souls are slowly taking shape. He killed to collect their souls? ”

"Quite possibly." Ji Ziyue said excitedly: "The mermaid princess can go to the sea at the age of 16, which shows that 16 years old is a dividing line. The killers may have thought that after the age of 16, their souls could not be stripped from their bodies. But......" he said puzzledly, "the fourth deceased is already 16 years old, why did he kill her." ”

Shen Zezhi found a photo of the fourth deceased, Zhou Yao, and they found that the girl was relatively petite, and she looked even smaller than all the other deceased.

Shen Zezhi said: "The murderer judges the age of these girls based on their appearance. He has severe dependent personality disorder, so he wants to collect souls to bring the person he relies on back to life. ”