"Professor Yue, please open the door to my colleague, there was a murder upstairs, and now the whole building is ours, don't worry." Shen Jinshu's voice seemed to be a little lazy, "I didn't follow up on this case, so I won't get involved too much, you can just tell my colleagues about the situation." ”

"Okay."

Yue Mo hung up the phone, sensing Du Qian's nervousness, he lowered his head and rubbed his chin twice on the top of her head, "Don't worry, let's go down together." ”

Comforted by him, Du Qian calmed down her emotions, her pale face couldn't really be seen in the dim light source, her thoughts flowed, and she inevitably walked in a trance.

Yuemo turned on the rear flashlight function of the phone, illuminated the path under her feet, and walked forward with her arms around her waist.

When I opened the door, there were several policemen in formal suits, who showed their police ID cards to the two people, and then began to ask them routinely.

Du Qian's family is monitored inside and outside the house, and the alibi is very sufficient, so the suspicion is naturally ruled out.

Du Qian quietly told the police about what she had seen today and the photo.

The power outage was also man-made, and the power supply system was quickly restored to the entire building after the trace was examined.

Du Qian sat down on the sofa, the mess in her mind came up, and she sat up from her seat with a "Teng", "No, I want to go and see the scene of the crime." ”

Yue Mo came over with a glass of warm milk and put it in her palm, dispelling her thoughts: "You can't get in, stay at home obediently." ”

Du Qian lowered her head and took a sip, and the doorbell rang.

Yue Mo went to open the door, and there were two policemen outside the door, but they were not the same two just now, they looked older.

"You're Professor Yue?" One of them asked.

Moon Mo bowed.

The man said, "That's right, we want Miss Duqian to help us investigate the scene together and provide strong clues." ”

Du Qian has been paying attention to the movement by the door, and when she heard this, she immediately raised her head and looked over, stood up and walked to the door, and saw the person outside the door stunned for a moment before saying, "Old Shen? Old left? ”

Yue Mo raised his eyebrows.

This posture looks like it should be recognized.

It's really an acquaintance, and it's an old acquaintance.

"Why are you in City A?" Du Qian asked.

The man known as Lao Zuo smiled, "One of the criminals being tracked down was killed before he was caught, and the way of death was similar to the one you upstairs, and there were two deceased people before that, and it was preliminarily determined that it was done by the same person, and we set up a task force with the police officers here." ”

"That's right," Du Qian nodded, "You want me to help me this time?" ”

Lao Zuo and Lao Shen glanced at each other and smiled: "You are still good at psychopaths, so I want you to do me a favor." The victims this time have no contact with each other, some are heinous criminals, some are white-collar workers who are modest and polite, and one is a minor child. ”

Hearing this, Du Qian's heart twitched.

"Take me up." Du Qian was silent for a moment, "I want to meet him." ”

"I'm with you." Yue Mo then said.

Du Qian looked up at him for a few seconds, pursed her lips and said, "You better take a rest, I'll be alone." ”

"It's okay, I'm not at ease."

Yue Mo said that he had already taken his clothes.

Lao Shen and Lao Zuo didn't say anything. It's normal for the little couple to be greasy and crooked.

Yue Mo didn't have the desire to deal with corpses, he found a place to sit down and sat there waiting for Du Qian to finish.

When Du Qian arrived, the body had just been transported away, giving her a chance to take a look.

The corpses were horrible.

Du Qian didn't want to use too many adjectives to list and analyze the cruelty of the criminal on the victim one by one, but through this corpse, she seemed to be able to face to face with that pervert.

At this time, the trace examination department and the forensic doctor also came to report the results of the work, and Du Qian was fortunate to hear the whole process on the side.

The victim was strangled with a headband, had binding wounds on her hands and knees, had been tortured before, no signs of sexual assault were found, and no family finances had been lost.

It looks like the murderer is playing a game.

No matter what it is, Du Qian will only spit on this person, despise other people's lives, and give up her own life.

Du Qian asked: "Lao Zuo, how did the previous victims die, do you have any information?" ”

Lao Zuo took out his mobile phone and sent the information.

After receiving it, Du Qian looked at it for a while, and said after a moment of silence: "Perverted serial killers are the most terrible criminals, their methods are cruel, and the crime rate is high, if you don't catch them as soon as possible-"

She didn't finish her sentence, but it was as if she was finished.

Once this madman wanders in the city for too long, the whole city will be at peace because of this madman.

"The murderer has several distinctive characteristics." Du Qian's eyes were shining, "The murderer has an abusive personality. This is one of the typical characteristics of a psychopathic serial killer. The murderer tried to get pleasure from the pain of others, he had a strong desire to control the victim, kidnapped the victim, first tortured him, and finally killed the victim by strangulation, a more painful death.

"So he also has the desire to control the life and death of others, and he put it into action, he used glass slag to draw flowers on the victim's stomach, so I think the murderer should be a more free and casual profession, such as a freelance writer or something.

"What does it mean that in the four cases, all of them were tortured first and then killed, and the tools used each time were full of randomness?"

Her sudden question stunned everyone, and everyone shook their heads.

"It means that he is in good shape, so he does not have a fixed tool for committing crimes." Du Qian said, "Ordinary criminals will choose to use the tools they are good at to commit crimes. ”

"Shouldn't it mean that his crime was random?" A policeman asked suddenly.

Du Qian's head: "The suspect is thoughtful, the four victims of the four cases live in high-end communities, the security work is very sufficient, and the entry and exit require a pass or registration, if he doesn't step on it in advance, he should choose a lower floor to start, so it is convenient to understand the environment and escape, but those are relatively high floors, so I think randomness can be ruled out."

Du Qian recalled everything that had just happened with his memory, and said after a moment: "The height is between 1.8 and 1.85 meters to strangle the victim so easily, weighing about seventy-five kilograms to eighty kilograms, with a criminal record, living in a high-end community with good conditions, not liking to socialize with people but eager to be noticed, not so much attention, more precisely should be eager to be seen His art of killing, has a lot of fans on social platforms or careers, and the activity area is not large, just in this city, It is likely that there has been cruelty to animals. ”

"Understood, we will immediately investigate in this direction."

Du Qian nodded, put away her thoughts, and walked to Yue Mo's side: "Let's go." ”