Yu Hua's belongings were placed on the table. The people in the physical evidence group turned on the ultraviolet rays. There was an envelope in Yu Hua's handbag. The envelope was empty, but under the ultraviolet rays, the front of the envelope was displayed, and Yu Hua was asked to go to the seventh floor of the teaching building at 1:40 that night.

It can be guessed that someone threatened Yu Hua...the chemistry teacher's gloves and special keys...In fact, the chemistry teacher went to Yu Hua's apartment and left something behind. Yu Hua took the envelope to the bathroom on the second floor of the party to find the answer. The envelope appeared under the ultraviolet rays in the bathroom on the second floor. The font was written with a pencil and a ruler, and the handwriting could not be checked.

Strangely, since Yu Hua is going to kill him and since he can control Yu Hua, why should Yu Hua go to the party? Why not let Yu Hua go to the teaching building directly? Su Cheng believes that the murderer is a chemistry teacher, but he does not think that the chemistry teacher will add to his potential. There must be some unknown reason.

This puzzle has been solved, but there is another puzzle. However, the ultimate puzzle is: How can the chemistry teacher kill Yu Hua? Use the mastered Yu Hua handle to threaten Yu Hua to jump off the building? No, this is impossible. Yu Hua's personality will not commit suicide. And if this handle is so powerful, then it's better to directly threaten it. Why bother to meet and go to a party?

Su Cheng was playing with his pen in his hand and thinking, and suddenly said, "Bai Xue, I want the transcripts of people around the chemistry teacher, students, neighbors, colleagues, and their views on the chemistry teacher himself, and the more special big and small things happened."

"Yes, consultant, have you found a breakthrough?"

Su Cheng shook his head: "I don't know, according to logic, a person's logic is divided into behavioral logic and spiritual logic. Now I can't explain behavioral logic, so I can only see whether the spiritual logic can be broken through. I guessed some boldly, but it requires a lot of evidence to confirm my guess. But..."

"but?"

"But if I guess it's right... let's do it first."

...

Interrogation room.

Su Cheng and Zuo Luo were sitting in front of him, with a chemistry teacher.

Su Cheng and Zuo Luo looked at each other, Zuo Luo signaled, Su Cheng opened the file in front of him: "Hello, Teacher Shangguan, I respect the teacher very much, especially teachers like you should be respected. But the law is so fucked. We are using people's money to eliminate disasters for others..."

Zuo Luo: "Can you use a good idiom?"

"That's what it means, just understand." Su Cheng opened the first page and said: "We basically knew the process. With the help of our technicians, we learned that Du Yiyi received anonymous information, which was sent to Du Yiyi by an Internet cafe. It was a photo of Du Yiyi's abortion medical record. There was another sentence, asking Du Yiyi to leave Huashuai."

Su Cheng said: "Du Yiyi is very inferior and ugly. Her parents have very high expectations for her. In addition, the title of top chemistry has been cancelled, her academic decline, and scholarships and scholarships have been cancelled. In fact, she will not commit suicide. After all, Huashuai is a tall, rich and handsome man. However, according to the regulations of international high schools, she and Huashuai will be expelled. After Huashuai is expelled, she will not be able to study abroad at a prestigious university and will be difficult to get involved in Fahrenheit's international trade. It is a fatal blow to Huashuai's future. Under this pressure, she chose to commit suicide, who is obsessed with love."

Su Cheng said: "Before committing suicide, she found you. To thank you for your cultivation, I apologize to you. Maybe that's the case. But you didn't read Du Yiyi's death intentions. After all, she has a rich boyfriend. Things finally happened and you were very angry. During the investigation, as Du Yiyi's mentor, you learned a copy of the abortion, so you suspected that it was Yu Hua's doing."

"Then you sneaked into Yu Hua's apartment and used her weekly swimming without a mobile phone. You saw a photo of the photo in her phone. So a revenge plan came into your mind." Su Cheng said: "First of all, you have to leave something, such as empty envelopes, letters, or other things. I guess you turned the photo into Yu Hua's mobile phone screensaver. Yu Hua was panicked at the sight. If this matter was announced, she would not be able to stay in high school."

"According to the prompt message or other information left by your phone, Yu Hua took an empty envelope to attend the party. When he arrived at the bathroom on the second floor of the party, Yu Hua turned on all the lights and saw the words left on the envelope. So Yu Hua went to the teaching building." Su Cheng said: "There is a troublesome place here. Yu Hua has no scars, no fights or bruises on his body. How can you, a middle-aged man in your fifty years old, throw her downstairs?"

Su Cheng said: "The logic of behavior does not make sense, so from the perspective of spiritual logic. You met Yu Hua and on the seventh floor of the teaching building. Of course, Yu Hua asked you what you want. You don't want money. You said that you want Yu Hua to experience the fear that Du Yiyi experienced. You asked Yu Hua to stand on the guardrail and feel the pain in Du Yiyi's heart when he jumped. In this way, many chances can explain why it was eleven forty? Because that was the time of Du Yiyi's death. Why was it a week later? Because that was Du Yiyi's first seven. I was even more strange in my heart, why did you want to take revenge."

Su Cheng said: "After investigation, we learned several situations. The first situation is that you were a tutor in Du Yiyi's junior high school. The second situation is that Du Yiyi's mother was your college classmate. You fell into the water in Qinghu in college. It was Du Yiyi's mother who sacrificed her life to save you. This is also one of the reasons why you became Du Yiyi's family. The third situation is that you and Du Yiyi's mother were lovers, but after graduation, you studied abroad, and she went to a state-owned enterprise and was eventually laid off. The fourth situation is that Du Yiyi and her father only knew that you and her mother were classmates. The reason why Du Yiyi was able to enter international high school was because you walked the back door during the interview and designated him as a top chemistry student."

Speaking of this, the chemistry teacher retorted: "No, it is no exaggeration to say that she is the most talented student I have ever met in the past ten years."

Su Cheng nodded: "We still thought you would be Du Yiyi's biological father, of course not. The love for talent, guilt, the first love lost hope in life, you chose to take revenge. Yu Hua's scheming must not be compared with you. Yu Hua really thought you were so pure, and Yu Hua felt a little guilty about Du Yiyi's death, so he stood on the guardrail and held the cross in his hand. I guess you should have let the religious Yu Hua repent... When Yu Hua died, he held the cross in his hand. But Yu Hua didn't expect that you gave her a trip."

Shangguan Chemistry Teacher was very calm: "It's a pity that you don't write novels with such imagination."

Su Cheng opened a new page and said, "You may not know that you are not the only one who wants to settle the score with Yu Hua. On that day, a couple saw Yu Hua go to the teaching building, so they followed Yu Hua upstairs and wanted to teach Yu Hua a lesson. Unexpectedly, they saw you killing people. It is not easy to pry open the couple's mouth, because they also hate Yu Hua. But... do you know there is something called transaction? The couple's male sister and her boyfriend use radiation to slowly kill Yu Hua, which is an attempted murder. The prosecutor is very despicable, so he made a small transaction. The prosecutor would plead for the couple's sister in exchange for the couple's male saying everything he saw."

The chemistry teacher said calmly: "This seems to be a frame-up. You have no way to close the case, so you can only buy witnesses to frame me."

Su Cheng: "I'm joking. There is no transaction, so the couple will not talk about it. But the couple waited down and found Yu Hua fell from the building. She looked up naturally and saw you. Although you are very mature, you are not a professional criminal. You can't help but stretch your head to take a look. The technical department found a fiber from Yu Hua's apartment, which is the fiber of the gloves you hid."

The chemistry teacher looked at Su Cheng for a while and said, "Okay, I admit that I did threaten Yu Hua and let her feel the grief and unwillingness before Du Yiyi's death, but I didn't push her, it was because she fell down by herself."

Su Cheng said: "Actually, what I said before is just a joke. You have the right to take back what you said."

The chemistry teacher shook his head: "I know you can confirm a lot of things. With my knowledge, I know you must have investigated the keyhole of the apartment too much. With the police's most professional skills, I believe that what you found will match the material of my private key. The police are not without technology, but they are not used in ordinary cases. When I know that you are in the Z department, I knew that this lie cannot be fulfilled."

The chemistry teacher said: "I didn't kill someone on purpose, but it was just an accident that caused the death of others. You police have no evidence to prove that I had killed Yu Hua. In fact, Yu Hua did make an accidental mistake. Afterwards, I was very nervous and returned to the laboratory and secretly adjusted the time while my students were concentrating on the theory."

Su Cheng frowned. This is what Su Cheng thought of when he guessed that the chemistry teacher committed the crime. Yes, it cannot be proved that the chemistry teacher pushed Yu Hua, and even Li Shuwen's younger brother probably did not see this action. Logically, the corridor was straight. Li Shuwen's younger brother showed his head and saw the two of them. He would not keep showing his head, but would shiver his head and eavesdrop. Can he convince the judge? It is difficult, no, unlikely. The police are obliged to provide evidence that the chemistry teacher pushed Yu Hua, but the police have no way to provide evidence in this regard.

One reason why Su Cheng likes detectives is that it is enough for detectives to find the truth, and the police need to confirm the truth. For example, in some cases in Conan, as long as the criminals deny it, or are not slandered, or even if they are scrambled, they can be denied, instead of thinking by cooperators, those cases cannot be convicted. In some cases, fishing can only be used without evidence, but will the murderer who can plan a perfect murder be involved in this kind of pediatric trick?

Zuo Luo said: "You are a teacher, and you can say that you have many talents all over the world, and you have both virtue and talent... Is your thoughts the same as ordinary people?"

Su Cheng retorted: "I don't support this. I can do my best to convict you, but I will not use high standards of morality to restrain and oppress you. We know whether you killed someone or not, but we can only do this in this case. We try our best. I think I am worthy of the wages I received. However, if I remember correctly, it should be three to seven years. Have you ever thought that in three to seven years, you could have cultivated a lot of talents."

The chemistry teacher replied: "I never thought that too much flowers would die, so I didn't think so much."

Su Cheng smiled and gave a thumbs up: "You are awesome, you are amazing, I admire you."

Zuo Luo looked at Su Cheng, and Su Cheng shook his head and said nothing. Zuo Luo thought for a long time and waved: "Take him down."

The door was closed, and Su Cheng and Zuo Luo were among the interrogation room. Su Cheng asked, "What are your tricks?"

Zuo Luo said: "Actually, we cannot deny that the teacher has not killed Yu Hua... What tricks should be searched to see if we can find some clues. If it really doesn't work, we can only send the case to the inspection and close the case."

“Hasn’t it been searched?”

"Last time I was looking for something, and this time we were looking for emotions."

...

Re-search, this time, if you don’t look for physical evidence, you should look at the photos of your emotions first.

Chemistry teachers like real photos, and there are many photos, and there are forty albums, with about four thousand photos.

Group 7 looked at the photos at the chemistry teacher's home. Su Cheng hated such tedious work the most. He asked the chemistry teacher's wife for a package of black tea and made it himself, regardless of whether others were welcomed. The chemistry teacher has a pair of fetal children, a strong son, and a doctoral student from a famous foreign university. He is currently working as an engineer in a top 50 companies in the world. His daughter is very ordinary. After graduating from college, he married a naughty student with a well-off level and a worry-free life.

Chemistry teachers are chemistry teachers in key high schools, and their teaching level is very high. They were poached by international high schools in their thirties. There are many photos of key high schools and classmates in these albums.

Song Kai said: "What's strange is that the students in key high schools no longer take photos with their teachers. Instead, many international high school graduates take photos with their teachers."

Su Cheng took the album and looked half-lying on the sofa, saying, "What you need in key high schools is grades and what you teach. International high schools teach according to their aptitude and talents. Moreover, international high schools have top students, and small groups have a sense of belonging. Most of the people who can be listed as top students have certain abilities in related fields after graduation. Key high school graduates are colleges and majors in colleges. Even if they choose chemistry majors, they are more important to them as tutors, not high school teachers."

Zuo Luo quietly flipped through the album and could read the teacher's pride and protect his character from the album. However, it is not all advantages. The teacher treats chemistry top students like his own children, but is very perfunctory to ordinary students. He believes that ordinary students cannot achieve success in the field of chemistry, and they only need grades.
Chapter completed!