"According to the information sent to me by Team Jiang, Wang Wei, who was killed in city B on July 8 this year, and Wang Qianqian, who was killed on November 28, both logged on to a Winter Solstice website before their death. Ding Jing, who was killed in Japan, was the founder of the website eight years ago."

Yu Zheng said, got up and walked to the notice board, turned on the small LED light, and wrote the word 'Winter Solstice' in the middle of the white board with a black marker.

"Yes." Lao Qin replied, "This website has not been maintained or upgraded since its establishment, so there are huge security loopholes, and the hackers still spend a lot of money to buy the hacking technology from country X. The last time in September After hacking into the database of this website, there is no trace of intrusion anymore. The murderer is so cunning, which undoubtedly increases the difficulty of our investigation."

"Very good." Yu Zheng rubbed his hands excitedly, "Among the four known victims, only Li Liwei, who was killed on September 22, 2014, because the police investigators did not immediately Looking for traces on the Internet, it is impossible to confirm whether the victim has logged on to the website before his life."

He wrote the names of Ding Jing, Wang Wei, Wang Qianqian, and Li Liwei, connected the 'Winter Solstice' in the middle with four straight lines, and then put a question mark after Li Liwei's name.

Jiang Chengyi asked Xiao Zhou to hand over a newly typed document to Yu Zheng, saying, "Last night, I found Li Liwei's information in the user database of this website, but I didn't have time to pass it to Dr. Yu in the morning."

"In other words, Li Liwei has also logged on to the website." Yu Zheng took the information and saw that in the list, in addition to Li Liwei, the name of a person named 'Deng Man' was temporarily added.

He looked back, raised his hand to erase the question mark behind Li Liwei's name, and continued, "In the transcript given to me by Team Jiang, there is a clue provided by a colleague of Wang Qianqian named Li Yunjuan, which is very crucial."

Jiang Chengyi nodded and put the information back on the table.

When Lu Yan was on the night shift that day, she overheard two colleagues chatting about Wang Qianqian. Because it was about Wang Qianqian, Lu Yan wanted to help solve the case. She told him about it when she came back from get off work, and he let Xiao Zhou run away. One trip, went to the First Affiliated Hospital to find Li Yunjuan to make a transcript.

Yu Zheng showed his amazing memory: "I remember this nurse named Li Yunjuan said: Wang Qianqian knew about this website because she met Wang Wei, a classmate from city B, it should be what Wang Wei said to Wang Qianqian, Wang Qianqian is the only one I especially believed in this wish-making website. Later, in Wang Qianqian's call list, I did find a record of three calls to Wang Wei in City B. Coincidentally, Wang Wei was killed not long after, and four months later, it was Wang Qianqian's turn. "

He put down his pen and turned around to look at Jiang Chengyi: "However, this is only a common feature of these four cases. From this point of view, it is impossible to prove that the murder of these deceased persons is directly related to the landing site. Team Jiang, clues The collection and sorting of the corpses are your strengths, and I am more interested in the research and profiling of criminal psychology. Next, let’s take a look at the throwing scene of the four victims.”

He asked Lao Qin to open the slide again, click on the pen in his hand, and draw:

Li Liwei's body throwing place - Taohua Park artificial lake

The place where Wang Wei's body was thrown in city b - Happy Horse Lake on the outskirts of city b

Wang Qianqian – the artificial lake in Nanshi Park (the park has been closed for over a year due to inclusion in the government’s redevelopment plan)

Ding Jing——Yanping Lake in Suburban

Finally, write a big word "water" in the upper left corner, and write "common point" next to it.

Xiao Zhou showed a surprised expression. Unexpectedly, Yu Zheng ignored other aspects and listed "water" as the first common point.

"The cause of death of the four people was that they were strangled and then thrown away, and the bodies of three people were wrapped in white inflatable waterproof material by the murderer and suspended on the water. Judging from the scene of the dumping of the bodies several times later, the murderer has gradually been able to follow his inner feelings. The idea is to set up the perfect crime scene. If Li Liwei's case is done by the same person, Li Liwei is obviously a failed attempt."

Someone was puzzled: "Is it because only Li Liwei's body sank to the bottom of the lake?"

"Although the murderer also wrapped Li Liwei's corpse with inflatable waterproof material, but because the material was of poor quality, there was an air leak, and the corpse quickly sank to the bottom of the lake. Admire his masterpiece.

Speaking of this, Yu Zheng smiled, and a small circle of oil appeared on each of his chubby cheeks: "I think the murderer paid a lot of attention to the discovery of Li Liwei's body after committing the crime, but several days passed, because the body was sinking. No one has discovered his masterpiece. It is conceivable that the murderer was very angry at the time. For the murderer, Li Liwei is an early work, and there are inevitably immature points, but when he committed the crime again, the murderer has avoided the same mistake, which shows that the murderer It has been making progress in recent years.

"Look at the information added by Jiang team yesterday. First, Li Liwei was killed three years ago, but on the eve of the winter solstice last year, there were witnesses who saw people dressed in the same clothes as Li Liwei. The two people not only have the same clothes, but also walk. Highly similar, the witness mistakenly thought it was a ghost, and also called a radio station called Gossip at 7:30 to share it as a ghost story.

"Look at the case of Wang Wei in City B. Before Wang Wei was killed, she also complained to her colleagues that the dormitory had been stolen, and what was lost was a skirt, a pair of high-heeled shoes and a hairpin that she often wore. Because it was not valuable. In the end, Wang Wei did not call the police.

"The third point, I just found a person named Deng Man on the name of the database. Team Jiang, has it been confirmed?"

"right."

"Okay, because the eyewitnesses have also made a statement in the epigram. Regarding the incident of the client named Deng Man, Team Jiang just verbally communicated with me yesterday. Eight years ago, there was an 18-year-old who committed suicide by jumping into the Sanming River in the suburbs. A 20-year-old woman is called Deng Man. On the night of Wang Qianqian's murder not long ago, a good friend of Deng Man's previous life met a person who was highly similar to Deng Man near the First Affiliated Hospital, because the witness was familiar with Deng Man before his death. I was very familiar with Deng Man's walking posture and dress. I was very surprised to see that that person not only imitated Deng Man's clothes and walking posture that night, but also used Deng Man's usual hairpins before his death. But because Deng Man was less likely to kill him, Therefore, Team Jiang did not incorporate it into other cases. Coincidentally, Deng Man was also one of the users of the Winter Solstice website that year, and he committed suicide by throwing himself into the river.”

He added Deng Man's name on the whiteboard, put a big question mark, and drew a horizontal line under the word "water".

"According to the information currently available, among the four victims, Wang Wei lost clothes before his death, Li Liwei's dress was imitated (doubtful), and the other two victims, Wang Qianqian and Ding Jing, have not yet appeared the same. Phenomenon."

He wrote "Women" and next to "Second Common Ground"