Zeng Jinling was unable to attend the meeting due to other important matters, and Qiao Yan spoke first. "I don't think the murderer this time is the same person as he was four years ago. Assuming that it is the same murderer, then the question arises, where is the murderer and what has he done in the past four years. If he takes pleasure in killing, then he cannot easily control his desire to sin again. In other words, the prisoner has been locked up in prison for four years and has only recently been released from prison, but four years ago, the murderer committed many homicides, and he still does not show a drop of water, how can he commit another crime and be easily arrested and imprisoned for four years, it is absolutely impossible. My thought is that the murderer of the year suffered some dramatic life change, such as getting married, such as the sudden death of his father, who he had always hated, and in short, lost his reason to continue killing.

And I think the nature of the crime this time is significantly different from that of four years ago. Four years ago, I was taking pleasure in killing people, but this time I didn't just take pleasure in it, but it also made people smell a little ulterior motives. For example, if it is a pleasure murderer, he will not kill people in a place like a small park, and he will hang people to a tree at the risk of being discovered, and then pose as a kneeling after death. There is also the number '4' on the ground, pleasure murderers will not leave such a message, this is revenge killing. No matter how you think about it, the murderer is someone else. ”

"The number '4' left on the ground means that four people will be killed, and one more person will be killed." Mo Yuqing added.

There was a lot of discussion at the scene.

"So, what about the pattern engraved on the hilt?" Li Haoxun asked again.

"It's a parody of America's most mysterious serial killer - the smiley killer." "In the past 10 years, at least 40 college students in 25 cities in 11 states have been found drowning after being missing for weeks, and the local police have classified these deaths as ordinary drunk and overboard accidents. However, after years of investigation, retired New York City police officers Kevin Gannon and Anthony Duarte discovered a terrible truth, in addition to the "drowning" death, most of them have another mysterious thing in common: that is, most of the drowning college students are honor students, and many of the crime scenes have a smiling face pattern painted with paint.

The two believe that these cases are not accidents, and that behind them lies a mysterious murder gang and a criminal conspiracy involving the whole United States. The smiling killer has not been captured so far. I compared the smiley face pattern painted in the paint with the pattern on the handle of the knife, and the similarity was almost 100%. ”

Everyone looked at Wanxing in amazement, waiting for her to continue.

"The three boys who were killed four years ago are also honor students, right?" Wan Xing asked the question first.

Li Haoxun gave an affirmative answer. "The three victims had excellent academic performance and were well liked by their teachers."

"That's right." Wan Xing said that the murderer four years ago regarded the American mysterious killer who specializes in killing honor students as an idol. And the smiley face pattern is engraved on the hilt of the knife and inserted into the neck of each deceased person, paying homage to the smiley face killer. The murderer of the year hated the honor students, and if the murderer this time killed with revenge, then he was likely to be a relative of the victim back then, so he would know the murderer's murder methods very well. And the one he killed was the mastermind or accomplice of the serial murder case back then. ”

"You're too confident, aren't you?" Fu Yiming sneered, "The cases that couldn't be solved by investing a lot of police force back then, you dare to draw conclusions at will based on what you are talking about here." ”

Li Haoxun frowned slightly, and asked Wei Chihong beside him: "What do you think?" ”

"I also think it's revenge killing." Wei Chihong analyzed that the prisoner committed the murder after careful planning in advance, considered the means of destroying the evidence, and then carried it out. Judging from the latest crime scene alone, after identification, the strangulation marks on the rope on the trunk of the tree are pointing in one direction, indicating that the prisoner hoisted the victim to the tree in one go. The victim weighed 65 kilograms, and in order to lift the 65-kilogram person, it was necessary to continuously exert more than 100 kilograms of strength. From this point of view, the prisoner should be a long-term athlete and physically strong. It is a man who lives like an ordinary person in society, has a high level of education, and is between 20 and 30 years old. From the first to the third time, the modus operandi continues to be sophisticated and gradually escalated, and the offender is likely to commit the crime again. '4' means to kill four people, and I agree that one more person will be killed. ”

Wei Chihong then shared his experience. "It is necessary to suspect the victim, the victim and the murderer are both human beings, and it is not easy to distinguish who is good and who is bad. The victim is a good person, and the murderer is a villain, and if you have this kind of thinking, you will mislead the direction of the investigation, and you will see the victim as the second murderer. ”

Li Haoxun nodded in agreement, Fu Yiming couldn't find anything wrong and didn't say anything more. None of the others objected. Therefore, the special case team first followed this path and launched an investigation into the identities of the three victims. In conducting the search, Li Haoxun particularly stressed that this time it is absolutely not allowed to fail in the investigation as it was four years ago.

After the meeting, Qiao Yan was about to leave the conference room, but was stopped by Wei Chihong. "Follow me to Cao Chongshan."

Qiao Yan silently followed him, and the two took the stairs to the seventh floor.

"Yo, Xiao Qiao is also here, you are really inseparable." Cao Chongshan squeezed his eyebrows.

"Get down to business." Wei Chihong didn't have the heart to joke with him.

Cao Chongshan snorted. "A small piece of red paper was found on the clothes of the third victim, which contained a small amount of chloric acid ions, like colored packets of firecrackers. In addition, sucrose and tannins were detected in the fibers of the deceased's shirt. ”

"What is tannin?" Qiao Yan didn't understand.

"Tannins are found in the stems and seeds, and to some extent in red wines. And cane sugar, which should be champagne. Linking the packets to champagne can lead to the conclusion that the victim attended a celebration that night, such as a party or a celebration party, Mr. Wei said.

In addition, the back of the deceased's hand was stained with petroleum solvents and fluorescent resin, and it was irradiated with infrared rays, which is the kind of seal used in KTV, bars, dance halls, cinemas and other places. After the stamp on the guest's arm, it is invisible, colorless, and has no trace, and the content of the mark cannot be seen under ordinary light. It can only be seen clearly under ultraviolet light, and the mark disappears immediately after leaving the ultraviolet light source. Cao Chongshan added.

Yu Chihong understood. "Just check which entertainment venue held the celebration that night, and you can find out the identity of the victim."

After finishing the matter, Cao Chongshan began to "deviate" again. "Lord Weichi, you still owe me a meal."

"I remember, when this case is over." Wei Chihong said casually.

"I'm waiting for the case to be over again." Cao Chongshan actually pouted, "Tomorrow will be tomorrow." ”

"Last time, you took your wife on a trip by yourself." Wei Chihong was not interested in talking to him, and planned to leave.

"Hey, it's because you're going on a date, okay?" Cao Chongshan winked at Qiao Yan with a pair of squinted eyes, "It's just a meal, it won't take much time, and you can continue dating after eating." ”

Wei Chihong couldn't help but correct. "Last time, we were on business, not dating."

"Oh-" Cao Chongshan immediately misinterpreted again, "Serious business, hehehehe." ”

Wei Chihong ignored Cao Chongshan's crooked words, he took Qiao Yan's hand and pulled her out of the forensic science and technology laboratory.

"Let it go!" Qiao Yan shouted, "If you are like this, it will make him misunderstand even more." ”

"Misunderstanding what?" Yu Chihong's hand increased the pressure on her hand, he stared at her, narrowed his eyes slightly, and stroked her cheek with the other hand.

With a burst of pressure, Qiao Yan suddenly couldn't breathe, her throat tightened, and she couldn't spit out a word.

"Wei Chi—" The sudden female voice startled her, and she pulled out her hand in a panic.

It was Li Shuhua, who probably also saw the scene in front of her, stopped, and turned her eyes to the window next to her.

"Is there something wrong?" Wei Chihong was very calm.

Li Shuhua turned around again. "It's fine." She smiled reluctantly, "I just want to ask, have you been to Cao Chongshan?" ”

"I've been there, and I know the results." Wei Chihong replied.

Qiao Yan heard the alienation in Wei Chihong's tone, and also saw the sparseness in Li Shuhua's eyes. "Let's talk, I'll go first." Embarrassed and uneasy, she hurried to the top of the stairs and ran down the stairs in one breath to leave the Public Security Bureau.

Qiao Yan returned to the dormitory alone. Mo Yuqing was summoned home by her parents, and Zeng Jinling was not there, she was the only one, deserted. After taking a shower, it was not yet 11 o'clock, and she leaned back on the bed, thinking dazedly about what had happened before. "Misunderstanding what?" She recalled the look and tone of Wei Chihong when he said this, he seemed to enjoy being misunderstood? Or......

"Alas-" She sighed faintly, forget it, it's actually not a big deal, but it was Yu Chihong who took her hand and touched her face, and happened to be bumped into by Li Shuhua. Li Shuhua is not Cao Chongshan, she won't make fun of them, and she won't broadcast indiscriminately, so this matter is over.

She wanted to find something to calm herself, so she picked up the book "Going to Zhulang Island to See the Old Villa" from the bedside table and revisited it. As soon as I opened it, I arrived at the chapter of the houseboat, and after reading it back and forth several times, a thick tiredness hit. She entered that strange dream again, with exquisite old villas and bright roses...... The enigmatic man appeared again under the wall of roses, but the fog was so thick that she tried to run towards him, but she couldn't find the way, and no matter how much she ran, she couldn't get close to him.

"Who the hell are you?" She shouted at the man's face hidden in the mist.

No one responded, only the ethereal sound of music wafting through the air.