Luo Cheng's words were loud, everyone heard them clearly, his reasoning was indeed impeccable on the surface, but there was still something worth scrutinizing.

"According to you, Lei Zhibin should be dead by now, why did he disappear? And you say that they were coerced, that is completely your supervisor's judgment, without any basis, what if this person is Lei Zhibin's accomplice? What if Lei Zhibin is the mastermind? Will he use the virus to spread suspicions? In addition, there is another key question, as you said, Lei Zhibin was coerced, and Wu Cheng was also killed by him, what is the motive? Why did he have to take revenge on them? What is the rationale? ”

Motivation is the biggest problem in Luo Cheng's reasoning.

If Luo Cheng's reasoning is true, then this murderer must have an enmity with these people, and this person has been planning since at least last year, he is a computer master, good at disguise, and has a strong sense of anti-reconnaissance, so how did Lei Zhibin provoke such a person?

Facing He Zhonghua's question, Luo Cheng hesitated for a moment and said seriously: "I think this should be related to Qi Hong, I think everyone knows that Qi Hong was a philanthropist before, he has funded many people, it is not excluded that someone will take revenge on Lei Zhibin for him, this person should be very close to Qi Hong, he knows Qi Hong very well, he knows what Lei Zhibin and these people have done, this person should be a computer master, with a strong sense of anti-reconnaissance, as long as we start from this direction, there should be gains." ”

"Maybe you're right, but do you know how many people Qi Hong has sponsored? According to the Foundation's information, he has funded at least thousands of people, how can you check? What's more, we don't know whether the murderer is a man or a woman, which is too difficult. He Zhonghua continued to ask.

"I can help with this."

Li Xiao raised his hand and brought up the photo of his finger just now, the photo was a little blurry, and he could vaguely see that there seemed to be a tattoo on his finger.

"Maybe you can't see it clearly, so I cut out this black shadow and made a comparison." Li Xiao changed a comparison picture again, the black shadow was deducted out, and there was a strange skull symbol on the side, Li Xiao moved the mouse to coincide the two pictures, the size and shape were exactly the same.

After doing this, Li Xiao began to explain the origin of this tattoo to everyone.

"I checked the relevant information and found that this tattoo comes from the logo of an ancient student organization at the University of Maryland, which is a small society that studies supernatural events, similar to the current interest organization, the outside world knows very little, only the members of the organization will have this logo, from the thickness and length of the fingers, I judge that this person should be an Asian, then combined with Officer Luo's words just now, this person should be a student who has received Qi Hong's funding and has studied at the University of Maryland in recent years, he is proficient in hacking technology and is also good at crime, It cannot be ruled out that this person is a computer science student at the school. ”

With Li Xiao's help, the scope of suspects has been greatly narrowed, and the investigation has a clear direction.

Luo Cheng looked at Li Xiao gratefully, Li Xiao just smiled and nodded without speaking.

At this time, Xiao Wu pushed open the door of the conference room and walked in.

"Team Zhou, Professor Tang has arrived."

"Really? That's great, now what about others? Zhou Huabei was overjoyed.

"I've gone to the physical evidence class."

"No, I'm already here."

A silver-haired old man walked in with two pictures in his hand and walked in with a smile, and Zhou Huabei hurriedly got up to greet him.

"Professor Tang, I finally waited for you." Zhou Huabei held Professor Tang's words, and then introduced to everyone: "This is Professor Tang, an expert in footprint identification, and he is the absolute authority of the footprint identification profession. ”

"Okay, it's over, okay, let's get down to business."

Professor Tang enlarged and pushed the two photos in his hand to the screen, and the content of the photos showed several clear footprints captured by the police at the scene of Wu Cheng's death.

"I think everyone is familiar with these footprints, human fingerprints are not only unique, in fact, the uniqueness of footprints is also very high, everyone's weight, height, and habits and other aspects will affect his footprints, so it will form his own unique footprints, I have studied these footprints before coming, the size of these footprints on the photo is indeed very similar to Lei Zhibin's, but this is not Lei Zhibin's footprints, but someone put on his shoes and deliberately imitated."

As he spoke, Professor Tang pointed to a footprint on the side, which had been intercepted by Lei Zhibin when he was fleeing.

"These two footprints are almost the same, the shoe pattern, the size is the same, even the outer eight characters of the right foot are very similar, I have to say that the murderer has done a lot of homework, but the imitation is imitation, the indentation of these two footprints is still different, Lei Zhibin's weight is about one hundred and fifty pounds, and the murderer's weight should be about one hundred and twenty pounds, the height is no more than one meter six five, is a relatively thin man, the age should be between twenty and twenty-five, okay, that's all I want to say, I'll have my assistant pass on the detailed appraisal report to you. ”

The audience burst into applause.

A master is a master, and it is easy to see through the murderer's disguise.

Professor Tang's words also solved a puzzle for everyone, that is, why both Lei Zhibin and Feng Lan appeared in a high-profile manner the first few times, but this time it only left a footprint, because the person who came was not Lei Zhibin at all, and this time the murderer personally took action.

"I still have a question, why did this murderer keep He Wei? Why hasn't he appeared after disappearing for so long? He Zhonghua asked.

His problem is also everyone's problem, why did the murderer keep He Wei? If he wants to kill them all, why should He Wei be left alive?

"Is it possible that the murderer has no enmity with He Wei so let him go, or is he afraid that he will be found out and hide?" Zhou Huabei asked.

The possibility he said was indeed possible, but after thinking about it, he felt that it was impossible, the murderer began to monitor He Wei and them a year ago, and he had a chance to do it, if he didn't want to kill He Wei, why should he monitor He Wei?

Does this seem illogical?

"No, the murderer will never let He Wei go, He Wei is definitely on his assassination list, please pay attention to the fact that all cases happened after Qi Hong was discharged from the hospital, is this a coincidence? No, I feel that it was deliberately arranged, and this is the psychological portrait I gave to the murderer. ”

Luo Cheng said and held up a stick figure, no one expected that Luo Cheng had completed the profile of the murderer in such a short time, which was too fast.

In Luo Cheng's pen, the murderer is dressed plainly, with long hair, a pair of thick glasses on the bridge of his nose, and a standard senior otaku.

"This murderer has a restrained and dark personality, rarely communicates with people, he is silent in his own world all day long, he is from a humble background, he may be a child of a single-parent family, he has a deep affection for Qi Hong, in the process of monitoring He Wei, he gradually discovered the true face of Hei Xiaohu and others, so he decided to take revenge, for which he killed all the children and did not let go of them, so he would never let go of He Wei, He Wei must die! This person should be very confident in himself, even complacent, thinking that he has played with us in the palm of his hand, I have a bold prediction, this person is in Qingzhou, looking for an opportunity to attack He Wei. ”