The personnel of the Physical Evidence Identification Center of the Public Security Bureau sampled the inside and outside of the apartment where Xiao Yuan lived, and only found that there were a little traces left on the balcony, and there were scratches on the balcony guardrail, but it was unnatural, and it could be determined that it was a murder scene.

"The murderer came here in a car, and there were two people in the car, one went to Xiao Yuan's apartment, and the other was waiting downstairs. It should have been the people upstairs who killed Xiao Yuan, and then the people in the car pretended to be Xiao Yuan and left in a taxi. After that, the murderer waited until about 1 a.m., carried the body to the bridge in a car, pushed the body down, and disguised himself as a suicide. Then leave with the woman pretending to be Xiao Yuan. Chen Yufei thinks this is the most reasonable inference, "but the murderer didn't know that there was a strong wind on the bridge in the early hours of that morning, so he put a pair of shoes to make the fact of suicide more realistic, but it turned out to be self-defeating." The murderer must have known that we were suspicious of Xiao Yuan, so he killed and took away the relevant evidence. ”

Xiao Yuan must have mastered some secret of the murderer, and this secret is likely to be related to the deaths of Ni Yanlin and Cui Hao.

The results of the DNA comparison were consistent, and the one who fell from the balcony on the second floor was identified as Xiao Yuan, and someone pretended to be Xiao Yuan and faked the illusion that she committed suicide, which was also confirmed.

The police questioned Shen Juntian and Nan Wei respectively. At the time of Xiao Yuan's presumed death, Nan Wei still did not have an alibi, her statement was that she was sleeping alone at home, and she said that she had no idea who drove her car. And Shen Juntian admitted his personal relationship with Fang Qianqian, saying that during that time he had a tryst with her at Fang Qianqian's residence, and Fang Qianqian also confirmed Shen Juntian's statement.

Although Cheng Yijie once again determined through the surveillance screen that the woman pretending to be Xiao Yuan was Fang Qianqian, and it was very likely that Shen Juntian and Fang Qianqian conspired to kill Xiao Yuan and made alibi certificates for each other, but the police had no other evidence. On the night of February 15, Shen Juntian had a sufficient alibi, and there was no evidence to prove that he was related to Cui Hao's death, and the investigation of several related cases reached an impasse.

Chen Yufei was sad about this, and couldn't help but ask for a tutorial Yijie, hoping that he could provide some enlightening ideas.

"If Cui Hao, Ni Yanlin and Xiao Yuan's deaths were all committed by the same person, according to that person's usual tricks, it is very likely that Cui Hao himself was not the one who checked out of the hotel in the early morning of February 14." Cheng Yijie thought about it and said, "Yang Xirou said that Cui Hao is very handsome and unforgettable. However, Xiao Li, the female staff member at the front desk of the hotel on duty, had a vague impression of the person's appearance, but remembered that he was wearing a very special ring on his hand, which showed that the person deliberately drew the attention of others to his hand and ignored his appearance. His appearance should have been disguised, such as wearing a hat and sunglasses, and his purpose was to prove Cui Hao's identity through that ring.

It should not be Cui Hao himself who called the person in charge of the conference affairs group the night before, there were so many people attending the meeting, it was impossible for the person in charge to recognize everyone's voice. My guess is that Cui Hao had been killed before the person in charge received the call, and then the murderer called the person in charge pretending to be him, saying that he was going to return to the UK early, and put on his ring the next morning and pretended to be him to check out, so that no one suspected Cui Hao's disappearance, and he also cleverly took advantage of the time difference to clear himself of suspicion.

Chen Yufei suddenly woke up: "Yes, our investigation started after Cui Hao checked out on February 14, it seems that we should re-investigate the surveillance video and push the time forward." ”

After re-investigation, it was found that at 9:10 p.m. on February 13, a rental vehicle drove into the Fisherman's Wharf parking lot, and a man dragged a large suitcase from the trunk and returned to the parking lot at about 2 a.m. Although the man deliberately avoided surveillance and couldn't see his face clearly, it was still through Cheng Yijie's analysis of the picture, as well as the investigation of the relevant personnel of the car rental company and the dock, it was basically confirmed that the man was Shen Juntian, who took a private boat to Li Island that night and returned in the early morning. It turned out that he personally did the throwing of the corpse, and the car of Xiao Yuan and Nan Wei later was just a disguise. And the one who pretended to be Cui Hao to check out must also be Shen Juntian.

"This man is really scum, he committed his own crimes, and let women carry the black pot!" Chen Yufei was extremely disdainful of Shen Juntian.

It was Friday, and the police wanted to ask Shen Juntian for questioning in the evening, but they couldn't contact him.

Also on this day, Nan Wei invited Zhang Lizhen, Yang Xirou and Mu Qingcheng to her home as guests, and a guqin concert will be held when the Nanfeng Guqin Cultural Village officially opens.

When she received Nan Wei's call, Mu Qingcheng had already made an appointment with Cheng Yijie to spend the evening together, so she could only decline, and after Nan Wei learned that she had an appointment with her boyfriend, she warmly invited Cheng Yijie to go with her. Mu Qingcheng thought that Cheng Yijie would definitely be unwilling, but she didn't expect him to agree, and later she realized that Cheng Yijie wanted to take this opportunity to observe and understand Nan Wei, after all, she was still a major suspect.

At 8 o'clock that night, the two arrived at Nan Wei's villa as promised, and Zhang Lizhen and Yang Xirou also came later, but no one answered the doorbell. After a while, Nan Wei drove back, and she apologized repeatedly, saying that there was a delay in the company, which was very rude. After she drove the car into the garage and parked it, she led a few people directly through the door that connected the garage to the corridor in the villa, put on shoe covers, and walked through the corridor into the villa living room.

Yang Xirou came to Nan Wei's house for the first time, and proposed to visit the villa, Nan Wei led everyone to visit around at will, and when she reached the second floor, Nan Wei said strangely, "The study is usually locked, and no one else is allowed to enter, how can it be opened today." ”

After walking to the door of the study, she suddenly broke out with a terrifying scream, her legs were weak, Yang Xirou supported her in time, and she did not fall.

After seeing the situation in the study clearly, Yang Xirou also let out an exclamation, and Zhang Lizhen and Mu Qingcheng were also frightened. Shen Juntian was hung on the beam of the study, shocking.

Cheng Yijie calmly entered the study, put Shen Juntian down, probed his nose, and died of exhaustion. He put the body on the ground and called Chen Yufei to inform him. He asked the three women to go downstairs to the living room, and he stayed in the study to inspect it first. There are sofas, computer desks, bookcases, etc. in the study, the computer on the computer desk is in working condition, Cheng Yijie moved the mouse, the computer display screen lit up, and a suicide note typed by the computer appeared on it, which read: The person who killed Cui Hao, Ni Yanlin and Xiao Yuan was me, because Cui Hao wanted to take away my wife and everything from me, and I killed him in a fit of anger. Ni Yanlin knew about this, and I could only kill her. and Xiao Yuan, who was also killed by me because he discovered my secret. But I was tormented by my conscience and decided to atone for my sins with death. ”

Cheng Yijie looked around and found that there were sticky notes on the edge of the monitor and many other places, and Shen Juntian had the habit of handwriting notes and recording various things. Then open the cabinet under the bookcase, and there is a bundle of ropes for hiking. He glanced back at the corpse on the ground, and it was a white wire that hung Shen Juntian on the beam. A person who is accustomed to using sticky notes, but uses a computer to type a suicide note, and hangs himself with a wire when he has a climbing rope in the study, which is unreasonable. Looking at the carpet in front of the sofa, there is a trace of soaking.

Cheng Yijie walked out of the study, Mu Qingcheng, Zhang Lizhen and Nan Wei were all in the living room downstairs. There was no sadness on Nanwei's face, more fear and worry. "Your hand hurts?" His gaze fell on the gauze wrapped around Nanwei's right hand.

Nan Wei glanced down at her right hand, quickly raised her eyes, and replied expressionlessly, "I was cut by a knife while cooking." ”

Cheng Yijie didn't say anything more, walked over to Mu Qingcheng and sat down.

Chen Yufei soon arrived with several criminal police officers and forensic personnel. A forensic examination of the rope marks on the neck showed that the edges were red and swollen, indicating that the victim was still alive when he was hanged. But there were no traces of inflammation on Shen Juntian's neck, indicating that he had died before he was hanged. This is murder, not suicide. The presumption of death was between three and five o'clock in the afternoon of the same day.

Cheng Yijie also informed Chen Yufei that there was a place on the carpet in front of the sofa that was soaked and it was necessary to take samples for analysis.

According to Nan Wei, the surveillance camera in front of the villa has been broken for a long time, she doesn't know how to repair, and Shen Juntian is very busy, so she forgot about it when she dragged it, so she couldn't see through the surveillance video that anyone had entered the villa. And Nan Wei provided her alibi, the company had a meeting at half past two in the afternoon, because Shen Juntian called her temporarily, saying that there was something else that could not catch up with the meeting, so she presided over it, and the meeting ended at four o'clock, and then she asked Fang Qianqian to stay, the opening of Nanfeng Guqin Cultural Village was imminent, the two had a lot of things to be busy, and they also ate a little casually for dinner, and they did not leave until 7 o'clock, and then Nan Wei hurried back to the villa, because of traffic jams on the road, she was late for a while.

"Why did Shen Juntian say in his suicide note that Cui Hao wanted to take away you and take everything from him?" Chen Yufei did not disclose that Shen Juntian had been confirmed to have died of murder.

"Because, the misunderstanding between me and Cui Hao back then was caused by Shen Juntian, Cui Hao learned everything, and when he came back this time, he really hoped that we could be together again. I also hate Shen Juntian in my heart, and I deliberately broke up Cui Hao and me, but for the sake of the child, I refused ruthlessly, I don't want the child to lose his father from an early age. Nan Wei said with tears in her eyes, "Actually, I know that Shen Juntian has many women, including Fang Qianqian, so I put all my enthusiasm and energy into my career to numb myself and forget about the unsatisfactory marriage." As long as he is good to the child, as for myself, it doesn't matter. ”