Xu Ziqian took Ding Xiaoqian to the Xiaoshan Conservatory of Music in person, trying to find any useful clues.

Dong Wanxing's evaluation among his classmates is similar to Hu Tingting's, majoring in cello, a very well-behaved and obedient student, and his relationship with other classmates is very harmonious, and he is deeply loved by the teacher. If nothing else, I will be sent abroad for further study in the second semester of my junior year.

According to Dong Wanxing's roommate, Dong Wanxing has had a girlfriend in the past six months, but he has never revealed who it is, but he basically goes out on weekends every week and returns to school on Monday. They asked about it, but Dong Wanxing refused to disclose any information, only saying that he would show them when the time came.

From this point of view, Dong Wanxing and Hu Tingting should be a pair of underground lovers, and they have not been publicly related for some reason. Now, less than forty-eight hours after Hu Tingting was killed, Dong Wanxing disappeared, which cannot be said to be just a coincidence.

"What does Dong Wanxing do at home?" Ding Xiaoqian asked.

A short, but thick, black-faced boy in the same dormitory said: "Their family conditions are not very good, his parents are pig and meat sellers, and they rely on a small business to support him to go to college." When he heard that he was going to be escorted, he also said that he had to sell how much pork he had to sell to earn tuition for further education! ”

A flash of light flashed in Xu Ziqian's eyes, and after bidding farewell to the classmates in Dong Wanxing's dormitory, he said to Ding Xiaoqian: "Another condition is met." ”

Ding Xiaoqian was stunned for a moment, and reacted to what Xu Ziqian meant.

The murderer of Hu Tingting was thin and proficient in anatomy, and was originally suspected of being Fang Xu, but at the moment, Dong Wanxing seemed to meet the above characteristics.

The family has been killing pigs and selling meat since childhood, Dong Wanxing must have been exposed to those skills. Could it be that the two of them hated because of love, because one of them refused to expose the relationship, and the other party became angry and angry, made an unpleasant scene, and finally caused a murderous disaster?

This may not be nothing, but the key question is that Dong Wanxing is missing now, is it because he is the murderer who absconded in fear of crime, or is the murderer someone else, and Dong Wanxing has also been implicated?

The two contacted Fang Qin, inquired about the address of the forensic doctor, and then went to the forensic doctor to get Hu Tingting's autopsy report.

"Before his death, he had smoked a large amount of dimethyl methyl ketone, and he suffocated to death......"

No wonder there were no traces on the body, it turned out to be drug suffocation.

I used to think that Hu Tingting was suffocated to death by covering her nose and mouth with her hands or using other tools, but Ding Xiaoqian checked it at the time and immediately denied this speculation.

If someone covers it with his hands, there will be a fracture of the nasal cartilage and bleeding and damage to the mucosal gums due to excessive force. If you suffocate with an object such as a pillow, there will be fibers in the nasal passage. At that time, there were no two characteristics, and Ding Xiaoqian could not find the reason for Hu Tingting's suffocation death.

Now that the report has come out, Ding Xiaoqian's doubts are even greater.

Dimethyl methyl ketone is a relatively toxic drug, and it is not a finished drug, where did the murderer get it? If it is extracted by himself, then the person has dabbled in both chemistry and medicine.

In this way, Dong Wanxing's suspicious ingredients are smaller, if he can be suspected purely from the use of the murder weapon and physical characteristics, then this drug ......

"It is not ruled out that the murderer had other helpers." Xu Ziqian saw Ding Xiaoqian's doubts and reminded him.

No one stipulates that a murder must be a single act, and a conspiracy to commit murder is reasonable.

Saying this, Dong Wanxing couldn't escape the suspicion again. The only person who can solve this mystery at the moment is Dong Wanxing, but where did he go?

Fang Qin suddenly called, and her voice, who was in charge of contact, was a little excited and anxious: "We have checked the surveillance cameras near the Conservatory of Music and found that the figure of the person who left with Dong Wanxing is very similar to Fang Xu. ”

Xu Ziqian immediately took Ding Xiaoqian back to the police station, identified the video, and determined that the thin boy who was with Dong Wanxing was really Fang Xu.

Summoning Fang Xu for the second time!

Fang Xu was taken to the police station again, compared to the last time, he was much calmer and much more helpless: "I said that you police are finished?" Do you know that coming to me again and again has a great impact on me? When I go back to school, I look at me like that, and if it affects my life, are you responsible? ”

"Fang Xu, the day before yesterday, that is, around four o'clock in the afternoon on October 17th, where are you?"

"I'm a personal **!" In the face of questioning, Fang Xu still used the same excuse.

didn't give him a chance to play tricks this time, when Fang Xu and Dong Wanxing's figures appeared in the video together, Fang Xu's face immediately turned like ashes.

"You ...... You ......"

He opened his mouth, but only said these two words, and then he remained silent, not saying anything.

Xu Ziqian left the interrogation room with Ding Xiaoqian, and Xia Xu was left alone in the room.

"Master, wait a minute, I'll go talk to him." Ding Xiaoqian couldn't ask for useful information, and he was a little anxious.

Xu Ziqian grabbed her, shook his head, and took her to the monitoring room next door, observing Fang Xu's behavior through the camera.

This is a tricky matter, Fang Xu's sense of protection is too strong, and they can't find a breakthrough. The more he pressed, the easier it was to suffer Fang Xu's backlash, it was better to leave him alone in the interrogation room and let him face emptiness and the unknown, perhaps this would lower his mental defense.

Moreover, Xu Ziqian didn't plan to hang Fang Xu like this all the time. It is only nine o'clock in the evening, and when it comes to about three to four o'clock in the morning, when people need rest the most, and it is also the time when the spirit is most relaxed.

Fang Xu was alone in the interrogation room, first stood up and studied the camera for a while, grimacing, and gesturing his middle finger, obviously knowing that someone in the monitoring room was observing him.

After playing for a while, I probably didn't think it was interesting, and I sat there with my eyes closed to recuperate, or maybe I was doing some mental activity.

Time passed minute by minute, Ding Xiaoqian and Xu Ziqian, who had slept for a day, were not sleepy, and Fang Xu in the interrogation room gradually became a little less energetic.

He leaned on the table for a moment, probably in an uncomfortable position, and leaned back in his chair for a while. Then he sat up again, looking around for a place to rest.

He tried to lie on the floor, the north in October was frighteningly cold, and the heating only started in November, the interrogation room was very cold, the floor was even colder, Fang Xu couldn't stand it after lying down for a while, and jumped for a while, it seemed that he was warming up.

Then he took off his coat again, and lay down curled up on the table, which was covered by a quilt.

Even though he was thin, the jacket still couldn't cover him all. He slept very unsteadily, curling up vigorously and stretching his legs vigorously.

When the time finally arrived at three o'clock in the morning, Xu Ziqian suddenly stood up and said, "Let's go, you can start." ”

Ding Xiaoqian immediately followed, the two of them did not hide their footsteps, Xu Ziqian opened the door of the interrogation room very strongly, so that Fang Xu, who was already sleeping unsteadily, suddenly turned over and sat up, staring at the two of them.

I don't know if it's because of the curled up, or if he was scared by the cold, or if he was cold, Fang Xu began to hiccup since he started fighting, one after another.

"Dong Wanxing is missing, we suspect that you have kidnapped him." Xu Ziqian suddenly said this.

Fang Xu hiccuped and said, "I kidnapped him? What does he have to kidnap me? Do you have a printing house at home, specializing in printing money? ”

He said with some disdain, "If you try to use the scare method to stop me from hiccups, then I can only say that you are too failed." What did I do myself, don't I know? Use this to scare me. Also, I'm a medical student myself, and I know better than you what I'm up to. ”

He pointed to his throat, took a few deep breaths, and held his breath for a long time. Just as he was about to turn blue, he exhaled violently, and then smiled: "Look, stop." ”

Ding Xiaoqian pushed the glasses on the bridge of his nose, it seems that Fang Xu is really very good at medicine, this way of stopping hiccups is a bit risky, but it is very effective, and people who are not sure generally dare to do this.