Take the old attack to solve the case

"The murderer used a very sharp and thin weapon. It is indeed suspected to be a sharp weapon such as a paper cutter." Forensic doctor Zhan Xinru said to Sun Liang while looking at the data coming out of the analyzer.

Another piece of evidence coincides with what Li Zi saw. Both Ding Yaxuan and Tian Yuanyuan were killed by paper cutters.

Sun Liang thanked Zhan Xinru, and immediately turned around and walked to the captain's office.

"Captain, I want to apply for physical evidence investigation."

"What physical evidence?"

"I suspect the cause of Ding Yaxuan's death. I need to investigate the chair she was sitting on when she died, and the paper knife she used to commit suicide."

"The paper cutter that Ding Yaxuan used to commit suicide was taken away by her mother. The chair should still be in the Feili English School. You can call and ask Pan Qingyue to accompany you."

"Yes, Captain!"

……

Seeing Sun Liang go out, Zhou Qingcheng, the vice-captain next to him, clicked his tongue twice, "Captain Zhang, you are a good apprentice. You have a flexible mind and a drive to do things. Most importantly, he still really loves the criminal police profession. You say, Why didn't I receive such an apprentice?"

Zhang Zimu couldn't help laughing, "As far as your method of training apprentices is concerned, only Jiajie can bear it. Sun Liang's small body will fall apart in three days."

Zhou Qingcheng stood up, moved his arms, and said, "I used to think that Sun Liang's health was not good, but look at yesterday's...weather, everyone almost collapsed, and he was the only one who could continue to work overtime with full energy. , it can be seen that Sun Liang is the kind of person who looks thin on the outside, but is actually resilient."

After hearing these words, Zhang Zimu restrained the smile on his face, tapped his fingers lightly on the table, "Qing Cheng, I need your help with something."

"What's the matter?" Zhou Qingcheng looked puzzled. Zhang Zimu was the captain. If it was a case, Zhang Zimu didn't need to say "help".

"I want you to investigate that Li Jinrui." Zhang Zimu said.

Zhou Qingcheng was taken aback for a moment, then frowned slightly, "Captain Zhang, are you worried about your apprentice?"

Sun Liang always thought that he was hiding it well, but he didn't know that in the eyes of Zhang Zimu, an old scout, his little thoughts had been clearly exposed, and even Zhou Qingcheng knew it well.However, people who came out of the army saw this kind of thing a lot. As long as Sun Liang didn't affect his work, Zhang Zimu and Zhou Qingcheng wouldn't care whether he liked a man or a woman.

But now Zhang Zimu wanted Zhou Qingcheng to investigate Li Jinrui, Zhou Qingcheng couldn't help thinking about it.

Zhang Zimu tapped the table with his fingers, and after a while he said, "I have a hunch that there is something wrong with that Li Jinrui, but I can't say exactly what it is."

Anyone who has been on the battlefield knows that intuition is often more important than observation when you don't know where the enemy is hiding or where the bullets are coming from.Zhang Zimu is a person who has actually been on the battlefield. Although it was just a small conflict that had never been made public and was sealed in a confidential file bag, he survived by relying on his intuition.

Zhou Qingcheng was also a soldier, so he naturally understood this truth. He glanced at Zhang Zimu and said, "Okay, leave this to me."

Although Zhou Qing grows tall and strong like a big man in the north, he is actually a native of Binhai City, a real fisherman, and he is the most familiar with Binhai City in the entire criminal police team. If he wants to investigate a person, he can investigate a person better than the police. The investigation is also detailed.

……

Ding Yaxuan "committed suicide" in her class after evening self-study.When the teacher came to open the door in the morning, she found that she was sitting on her own chair, her head was leaning back on the back of the chair, her hands were hanging down naturally, and there was blood all over her body and the ground.

The classrooms are all made of concrete floors, and the blood seeps into it, forming a large dark brown patch, which cannot be washed off with water. For those panicked students, the original classroom was temporarily closed, and the students were moved to another functional classroom.

The classrooms in Class [-] and Class [-] of the former senior high school basically kept the original appearance, only Ding Yaxuan’s seat was moved, probably when the staff came to wash the floor, but it can still be clearly seen on the cement floor A shadow left by a large bloodstain.

"It's this chair." A female teacher who brought Sun Liang and the others pointed to a lonely chair beside her. She was Ding Yaxuan's class teacher. Thinking of that little girl who worked hard, she couldn't help becoming popular. eye socket.

The classroom has been closed for almost a month, but Sun Liang can still smell a faint smell of blood, because the doors and windows are closed, and there is not much dust on the desks and chairs. Traces of tape that had been wrapped around the chair were found, and even a small piece of tape was found on the back of the chair.

Although this further shows that what Li Zi said may be true, but Ding Yaxuan's body has been taken back by her mother and cremated, so it is not easy to find more clues.

"I would like to extract the monitoring from your school, especially the monitoring on the day of Ding Yaxuan's death." Sun Liang said to the female teacher.

The young female teacher was stunned for a moment, and said: "I'll go and tell the principal... Police officer, is there something wrong with Ding Yaxuan's suicide? She... Could it be..."

"It's just an investigation for the time being." Sun Liang shook his head at her.

The female teacher took two steps away in silence, then turned back suddenly, and said, "Officer, actually... we all suspected that Ding Yaxuan did not commit suicide. Although she is relatively introverted, she doesn't look like a child who would commit suicide. .”

She spoke very fast, as if she was afraid that she would not be able to continue in the middle of her speech.

"You?" Sun Liang looked at her.

The female teacher lowered her eyes and nodded, "All our teachers think so."

"Then why didn't you call the police?" Sun Liang asked.

The female teacher pursed her lips, hesitated for a moment, and said: "It's too late, Ding Yaxuan's mother rushed over as soon as she received the call. At that time, the police station was not on duty, and the police came a little later. Ding Yaxuan's mother had already taken Ding Yaxuan away. .”

Sun Liang heard a hint of shame from her tone, and immediately understood the reason.

Generally speaking, if a student dies on campus, no matter what the reason is, the parents will go to the school to make trouble, such as Feng Ruilin's parents and Song Yusheng's parents.If you are lucky, the school can solve the problem by paying a sum of money. If you are unlucky, the school, especially this kind of private school, is likely to be shut down.

Ding Yaxuan's mother didn't make any noise when she came here, instead she took Ding Yaxuan's body away. This is the best thing for the school, how could she go to report the crime and make a big fuss.

This kind of non-reporting of knowledge, or deliberately pretending not to know, often complicates many originally simple cases, and is the culprit that many cases have not been solved, but Sun Liang has no way to blame the school for its actions.

It is said that "the law does not tolerate mercy", but there is another saying that "the law is nothing more than human feelings".

When a child dies accidentally at school, parents can put pressure on the school or seek compensation through legal means. However, in order to obtain more compensation, these parents often choose to go to the school to make trouble, and the situation escalates, making the school afraid. It became small and trivial, so Ding Yaxuan's mother chose to take the child's body away. The school probably wanted to burn incense, so why would they want to report the crime.

After Sun Liang went to get the surveillance video, he went to the local police station before returning to the police force.

……

At 04:30 in the afternoon, Zhang Zimu held a case analysis meeting.

"Sun Liang came over this morning and asked me if the murder weapon used to kill Tian Yuanyuan was a paper knife. In fact, this was also the murder weapon I suspected at the beginning. Later, I analyzed the tissues near the wound and found out The composition of the anti-rust oil made me sure that the murder weapon should be a paper knife." Forensic doctor Zhan Xinru said.

General knives are made of stainless steel, but paper knives are not. They will rust after a long time or get wet, so some anti-rust oil will be applied before leaving the factory.

After Zhan Xinru sat down, Pan Qingyue, who was in charge of physical inspection, stood up.

"Today, I inspected the chair that Ding Yaxuan was sitting on when she died. On the back of the chair, I found traces of tape wrapped around it. I also found a small piece of tape. After inspection, I found that the tape was exactly the same as the tape wrapped around Tian Yuanyuan when she was killed. , all of which have been out of the factory for more than two years, it is very likely that they are the same volume.”

Because the tape is a consumable, it will be used up soon after buying it back. All of them have been out of the factory for more than two years. The same tape means that the murderer is likely to be the same person.

Zhang Zimu glanced at Sun Liang but didn't let him speak, but gestured to Cui Xiaoyu.

"Tian Yuanyuan's father's assistant came over this afternoon and brought her father's power of attorney. The assistant will be fully responsible for all funeral affairs." Cui Xiaoyu said with a deadpan expression.

The feeling that no one in your family cares about your child's death, but we have to work overtime to avenge your child's grievances makes everyone very uncomfortable.

Dong Jiajie sneered, seeing Zhang Zimu look over, he stood up and said, "Captain, I found the hospital where Tian Yuanyuan had several abortions. She didn't use her real name, but used the name of a nanny in her family. Within three years There were six abortions in total, because she was too young and the frequency was too frequent, the doctor remembered her appearance.

The doctor said that although Tian Yuanyuan was accompanied by a middle-aged woman every time, she should be the nanny of Tian Yuanyuan's family because of her attire. Once she heard Tian Yuanyuan crying to the nanny, why didn't grandpa come? Obviously he did something bad, so why should he stay out of it after finishing it. "

grandfather? !

That Tian Fengru, who is quite famous in China and owns shares in several private schools?

Tian Fengru used to be a professor at a university, and his wife was a well-known strong woman in the business world. After his wife died ten years ago, he resigned and started a private school. Later, he partnered with others to open several private primary and secondary schools. The press often Call him "educator".

Everyone has an expression of "an educator is so inferior to a beast, this world is going to end".

After a while, Zhang Zimu tapped the table with his fingers and said, "Let's put this aside for now, Sun Liang, why do you suddenly suspect Ding Yaxuan's death?"