On the last day of the New Year's Day holiday, the case analysis meeting of the Second Criminal Investigation Team of the Municipal Public Security Bureau.

The traces department and the forensic department have successively given reports.

The murder weapon was the tailor's special big scissors at the scene, and a large amount of blood stains on the scissors belonged to Qiu Changtian, but no fingerprints were found on the scissors, which means that the murderer dealt with it.

Alprazolam was detected in a half-drunk functional drink at the scene, and two sets of fingerprints were extracted from the bottle. One group belongs to Qiu Changtian, and the other group belongs to Zheng Feifei.

In addition, because of the large number of unrelated people gathered at the scene of the crime, no useful footprints and other useful traces were extracted.

According to the report given by the forensic department, alprazolam was also detected in Qiu Changtian's body.

This also explains why the modus operandi at the murder scene is so neat.

The murderer took advantage of the fact that he took triprazolam and fell into a coma on the autumn day.

Sun Haoran: "There are two sets of fingerprints on the drink bottle, one belongs to the deceased and the other belongs to Zheng Feifei. It is impossible for Qiu Changtian to poison himself, and Zheng Feifei cannot rule out suspicion. Of course, the possibility that the real murderer put triprazolam into a drink bottle for Qiu Changtian to drink. According to the murderer's meticulous methods, it is possible that he was wearing gloves, so his fingerprints were not left on the drink bottle. ”

Qi Nan answered: "I don't think Zheng Feifei is very likely, such a bloody scene, a little girl, can she do it?" ”

Yanan objected: "Bai Xiaomeng is weak, how did she kill that dead pervert Hu Lai?" ”

Qi Nan: "That's different, Bai Xiaomeng hates Hu perverted to the extreme. And Zheng Feifei, after our visit and investigation yesterday, it is said that she and Qiu Changtian have been getting along for a day or two. In Class 2 of the third year of high school, this is almost an open secret, she is also different from Bai Xiaomeng in that she is a lively and cheerful girl, and it is said that she has true love for Qiu Changtian, so she does not have that kind of hatred for Qiu Changtian that must die. ”

Ma Heiniu took over: "I put forward some personal opinions, they all say that love is selfish, and Qiu Changtian obviously can't belong to Zheng Feifei alone, will Zheng Feifei take Qiu Changtian's life because of love and hatred?" ”

Qi Nan gave a thumbs up: "Hei Niu, I really praise you, I can't see it, you are a single dog, or an iron-boned and tender man, you know a lot." ”

Yanan snorted and laughed: "Auntie, it's not a day or two since you slapped your face, I admire your spirit of repeated defeats and battles, but I also deeply suspect that you graduated from the police academy." ”

Qi Nan: "Yes, you should come up with evidence!" ”

Yanan: "Okay, you don't hit the south wall and don't look back, and you don't give up until you reach the Yellow River." The night before yesterday, Senior Brother Yun and I went to see the surveillance at the entrance of the teacher's dormitory of No. 8 Middle School, and Zheng Feifei's figure was found in the surveillance, and the time was at 10:50 p.m. on the day of the crime. There was also a middle-aged man beside her, the two of them did not enter the dormitory, but they stayed at the door of the dormitory for several minutes, at the end of the road at the entrance of the teacher's dormitory, there was a main road, and there was a surveillance at the entrance of the main road, Zheng Feifei and the middle-aged man got into a taxi. At this sensitive point in time, why did Zheng Feifei appear there? ”

Qi Nan: "On the night of the crime, Zheng Feifei was at the school gate at 10:19. And she appeared with a man at 10:50 in the surveillance at the door of the teacher's dormitory, which is suspicious. She had a helper, and it would be much easier to kill Qiu Changtian. I still don't think she had a motive to kill Qiu Changtian. ”

Yanan: "The back door of the eighth middle school, although it is said that for security reasons, the teachers are not allowed to enter and exit from there, and the key is also handed over. But going back to the dormitory through the back door is at least ten minutes shorter than going through the front door, and who can guarantee the possibility of sneaking in and out of the back door without any one trying to make it convenient? Yesterday's investigation learned that the middle-aged man was actually Zheng Feifei's father, Zheng Gang. Is Zheng Feifei willing to get along with Qiu Changtian, or does she have another secret? I didn't see Zheng Feifei herself, I don't know. Could Zheng Gang have been ruined by Qiu Changtian's old thing, and in a fit of anger, he and his daughter took Qiu Changtian's life after careful planning? ”

Ma Heiniu: "You mean, Zheng Feifei asked Qiu Changtian to drink the bottle of drink with narcotics during her tryst with Qiu Changtian that night. Then went out through the front door of the school to create the illusion that Qiu Changtian's death had nothing to do with her. Then she and her father, who was waiting outside, entered the old school building through the back door of the school, and after killing Qiu Changtian, she went out through the back door? ”

Qi Nan's IQ is on the line: "I don't think this analysis is valid." First of all, assuming that what Su Man said was true, her call to Qiu Changtian at 10:25 p.m. was answered by Qiu Changtian himself. And Zheng Feifei left the school gate at 10:19 that night, which indirectly proves that Zheng Feifei left the school before Qiu Changtian was killed. She and her father then entered the old school building through the back door and committed the crime. There is a big bug in this analysis, that is, how did Zheng Feifei know that Su Man would make this call to Qiu Changtian at 10:25 to make an alibi for her? First, unless she's a god. Second, Suman is in league with her, but I don't think it's very likely.

Secondly, Su Man made this call to Qiu Changtian at 10:25, and the phone was on the phone normally for more than a minute, but apart from Su Man himself, who can prove that the person who talked to Su Man at that time was not the murderer? In addition, if Zheng Feifei was really the murderer, would she be so stupid that she ran to the teacher's dormitory building with her father, for fear that others would not know about the suspicion of their father and daughter? ”

One or two of them were all slapped on the line for Qi Nan's rare IQ.

Yanan said: "Although your analysis is reasonable, you still can't rule out Zheng Feifei's suspicion." In order to avoid startling the snake, everything has to wait until Zheng Feifei and her family return from other places to come to the answer. ”

Xiao Mo: "After yesterday's investigation, have you gained anything?" ”

Ma Heiniu: "Yesterday, I visited Zheng Feifei's social relations, and a boy in Class 5 of the third year of the eighth middle school came into my sight. Since entering high school, he has been chasing Zheng Feifei relentlessly. But Zheng Feifei was not interested in it, and heard from her classmates that since she heard that Zheng Feifei had something to do with Qiu Changtian, Zhou Kai let go of the big words, saying that he would definitely give Qiu Changtian some colors to take a look. According to the investigation, Zhou Kai went to the singing bar with a group of buddies to drink that night, and there was an alibi. But a buddy who drank with him said that while drinking, Zhou Kai asked Zheng Feifei to call and ask Zheng Feifei to sing, but Zheng Feifei directly refused. Zhou Kai seemed particularly faceless, and when he was drunk and smoky, he also said cruel words, saying that he must find someone to clean up Qiu Changtian. But Zhou Kai said that it was just a big talk, he didn't have the courage to kill. ”