Sang Yunqing asked the reception staff of the Municipal Bureau of City C to take her to the forensic office. The bodies of those girls are kept here.

Pushing open the door, a male forensic doctor working at the autopsy table looked up.

"Forensic Doctor Chen, Forensic Doctor Sang of the Special Case Team at this time, she wants to see the bodies of those girls." The receptionist gave them a warm introduction. "Forensic Doctor Sang, at this time, Forensic Doctor Chen Su of our Municipal Bureau."

Chen Su lifted the frame of his glasses with his hand: "Long time no see, Sang Forensic Doctor." ”

Long time no see? Not to mention that the reception staff was stunned, even Sang Yunqing herself was very surprised, in her impression, it seemed that she had never seen this Chen Su.

Chen Su obviously understood her doubts, he put down the tools in his hand, took off the rubber gloves and washed his hands before coming over and said: "I am the 2004 class of the Forensic Medicine Department of the Public Security University, and Doctor Sang is my senior sister. ”

The reception staff showed a suddenly realized expression, and he said with a smile: "Since you all know each other, it will be easy to do, then I, a layman, will go out, and you two forensic comrades will have a good exchange." ”

Sang Yunqing watched the reception staff go out, and before she could speak, Chen Su seemed embarrassed, and he said again: "Doctor Sang was too famous at that time, but you shouldn't have seen me." ”

Sang Yunqing didn't want to waste time on these irrelevant things, she nodded perfunctorily and asked, "Where is the body of the deceased, I want to see." ”

Chen Su hurriedly led Sang Yunqing to the inside of the autopsy room, where there were five beds with white cloths covering the bodies of the five girls.

Sang Yunqing said thank you coldly, opened the box he had been carrying and started working. Chen Su stood beside her and watched her work. In fact, Sang Yunqing is more annoyed that others stand aside when she is working, but this is also Chen Su's territory, and she is not easy to drive people away.

She lifted the white cloth covering the five corpses in turn, and found that Chen Su had already dissected three of them. The fourth and newest deceased, Chen Su, did not move.

Chen Su saw Sang Yunqing's slightly frowning brow and hurriedly explained: "I haven't touched these corpses since I received that you were going to take over this case. ”

Sang Yunqing turned his head to look at him and asked, "What did you find?" ”

Chen Su saw that Sang Yunqing was willing to deal with him, and immediately shook his discovery like a bean.

"I found out that the deceased had died before they were thrown into the sea, and this is the real cause of their death." Chen Su took the inspection report and showed it to Sang Yunqing.

Sang Yunqing was surprised: "TTX? ”

Chen Su nodded. He continued: "Because they died before they entered the water, I didn't find any fluid in their lungs. A pinhole was found in the inside of their arm, so the killer must have injected TTX into their artery. ”

Sang Yunqing said: "Accelerate death." ”

Chen Su added: "Reduce the pain." ”

Sang Yunqing stopped his movements and looked at him: "How do you know that he really reduces the suffering of these dead." ”

Chen Su said in a low voice: "I looked at these corpses, and they didn't have the slightest scars on their bodies, which is too rare in kidnapping and murder cases. So I think he probably didn't want them to die in pain, so he chose to inject TTX to speed up their death. ”

Sang Yunqing didn't say anything after hearing this, she asked coldly: "Have you detected the concentration of TTX in your blood?" ”

Chen Su hurriedly said: "It's about ten times the general lethal amount." ”

Sang Yunqing nodded and praised it rarely: "It's done well." ”

Chen Su's heartbeat became cheerful for a moment.

Qi Kai looked at the sign of the municipal middle school for a while, and then walked to the communication room and took out his documents. When the communication room saw that his ID was from the Ministry of Public Security, he didn't dare to be careless and immediately reported it to the principal. Within a few minutes, the principal and director arrived.

Qi Kai explained his intentions, but the principal was very cooperative. He said while taking Qi Kai to the campus: "Our school is also very sad when something like this happens, and we will definitely cooperate with the police to catch the murderer as soon as possible." It's just Officer Qi, the impact of this case is too evil, so please try to keep a low profile when investigating, otherwise it will easily cause panic among students. ”

Qi Kai nodded and said, "I know." Well, you find a place, and I'll talk to someone alone. ”

The headmaster nodded repeatedly: "Hey, okay, okay." ”

The first thing Qi Kai saw was the head teacher of the deceased Zhao Shu. Her homeroom teacher was a male teacher who taught math. Looks less than thirty years old. Good looking, smiling, at first glance, it is the type that is more popular with students.

"Hello, I'm Qi Kai from the special case team, I want you to come here to learn something about your class Zhao Shu." Qi Kai said politely.

Hearing Zhao Shu's words, the head teacher accepted the smile on his face, and he said regretfully: "I heard about Zhao Shu, it's a pity." ”

Qi Kai cut straight to the topic and asked, "How is Zhao Shu's popularity in your class?" ”

The head teacher said: "It's good, she is beautiful, has good grades, and has a good personality, so she is very popular among her classmates." Several stinky boys in our class like people. ”

Qi Kai said: "Then do you know that she has a connection with people in society outside the school?" ”

The head teacher shook his head: "I haven't seen it." It's unlikely, her father usually picks her up when she goes to and from school. I don't have a chance to socialize with people. ”

Qi Kai said again: "As far as we know, on the day of her accident, her father asked her to go home by herself because of something. Do you know who she walked with that day? ”

The head teacher said, "I know this, the last class that day happened to be a math class, and I let them study for a class." When I got out of school, I told them to go home early, and when I left the classroom door, I heard Zhao Shu and her table sharing saying that she wanted to go home alone, and she said that she wanted to go with her. She was at the same table and their house was in the same direction. ”

Qi Kai said: "Can I talk to Zhao Shu's tablemate." ”

The head teacher stood up and said, "Of course." But she shouldn't know about Zhao Shu yet. So ......"

"I understand." Qi Kaidao.

A few minutes later, the head teacher brought a little girl over, she was Zhao Shu's tablemate Ma Yuan.

The head teacher comforted her a few words before entering the door, and Ma Yuan was in a good mood when she came in.

"You're Ma Yuan, please take a seat." Qi Kai said gently.

Ma Yuan walked to the chair and asked, "The teacher said that you came to ask about Zhao Shu, what's wrong with her?" She hadn't been to school in days. ”

Qi Kai avoided her question without a trace: "I heard that you went home with her that day." Can you tell us what happened that day? ”

Ma Yuan thought for a while and said, "It's nothing special, I took bus No. 302 with her, and I got off at my station." They still have three stops to go, and she's on the bus. ”

"So you were separated from her at your doorstep?" Qi Kai asked.

Ma Yuan nodded: "Yes, but we still use our mobile phones to chat QQ." Later she said she was home and we didn't talk. ”

Qi Kai asked, "She told you that she was home?" What did she say? ”

Ma Yuan thought about it and took out her mobile phone to log in to QQ, and QQ still kept the record of their last chat. Zhao Shu's last message in it was: "I'm in the community, I won't talk to you, I'll talk about it in the evening." ”

Qi Kai said with a smile: "You have done us a great favor, thank you!" ”

"Uncle, is something wrong with Zhao Shu?" Ma Yuan asked.

Qi Kai stopped and turned his head to look at Ma Yuan, and couldn't bear to tell her that the sentence on her phone was the last sentence in their lives.

Shen Zezhi put down his mobile phone and said to Ji Ziyue: "Qi Kai has made an important discovery over there, now we have to act separately, I will go to Wang Danyang's house to have a look, you go to their school."

Kiko Yue said: "Okay." ”

Things were really as Shen Zezhi expected, he looked for the school from the community along the road where Wang Danyang usually went home, and checked the monitoring of various monitored stores all the way. finally determined the place where Wang Danyang last appeared.

It's a small alley with a few old residential areas and shops outside. According to common sense, Wang Danyang will definitely not go in. But if Wang Danyang didn't go in, the murderer would definitely not be able to catch her, because people were coming and going outside, and Wang Danyang would not struggle as big as a person.

That is, what attracted Wang Danyang's attention and let her walk into that small alley?

Shen Zezhi walked in slowly, and there were high cement walls on both sides, and there were only two small doors on the walls. It can be seen that this is definitely not the main entrance. Inside is an old-style building. Shen Zezhi walked in through the small door on the left, and there was no one guarding the door inside. There will definitely be no surveillance equipment in this community. He found them according to the windows of the houses he had just seen in the alley. He knocked on the door of the house, showed his ID, and walked into the house.

Through the kitchen window of this house, you can see a little way into the alley. He observed for a while and asked the man who was following him, "At about half past six in the evening of the 15th, did you see a junior high school girl in a blue school uniform walking into the alley below?" ”

The man thought for a moment: "The 15th is ...... Last Thursday, right. I see it. ”

Shen Zezhi's eyes lit up and asked, "What did you see?" ”

The man said, "There was a student who walked in, and it happened to be me cooking that day, and I thought it was strange, that student was not from our community at first glance." But she didn't stay a few minutes before leaving. ”

"Gone? Did you see her out? She was alone in the alley at the time? Shen Zezhi asked.

The man touched the hair on the back of his head: "I don't know if I went out or not, anyway, I saw her walking out, and then I went out with food, and when I came in again to get chopsticks, there was no one inside, so I should have gone out." I don't know if she's alone, but I've only seen her alone. ”

Obviously, Wang Danyang did not go out. After Shen Zezhi finished asking, he returned to the alley, according to the person just now, he should have been attacked and taken away by the murderer when Wang Danyang was walking out. But what happened in the alley at that time that attracted the attention of Wang Danyang, who was supposed to go home?

Shen Zezhi walked outside, and he followed Wang Danyang's path home from school and continued to walk towards school. Wang Danyang's home is very close to the school. The walk is no more than ten minutes. Shen Zezhi stood on the opposite side of the road at the school gate and looked at the crowd around him, at that time, the murderer should have been hiding nearby to observe Wang Danyang and follow her home. Well, this person must be very inconspicuous, at least for at least a few days at this time at this time will definitely attract the attention of others.

Suddenly, there was an exclamation next to him, and Shen Zezhi turned his head to look. A child slipped on the side of the road and sat on the ground, and a student next to him happened to see it and went over to help him up. The boy's parents thanked the student again and again.

Shen Zezhi's eyes suddenly sharpened, and he finally understood what Wang Danyang was attracted to and walked into that small alley that was rarely populated.