"The police won't find a motive for the killing."

In a dark room, there is a man in black pajamas, lying on a computer chair.

Opposite him was a woman sitting on the couch with a cold gaze on him.

He continued: "If the police investigate Niu Jin, they will definitely think that he was killed by someone who knows his living environment, but they will never guess that the murderer does not know him, and the second never knows him. ”

"But as you said, there is a man who knows of your existence. That student is a hidden danger. I don't want anything unexpected about our plans. ”

The person in the computer chair thought for a moment and said, "If they want to check, let them check." I actually don't understand why you came to me today, you should know that we don't know each other, and we have never been in contact. Believe me, do what I say, and the police won't be able to find you for the rest of your life. ”

The woman sneered: "Everything is done for you, but you must know that what I did is the easiest to discover." I extracted the ether from the ethanol and gave it to you, and I made the hydrocyanic acid, so if the police suspect me, everyone will be doomed. ”

The man frowned and thought for a while, then said, "It's useless to mention this now, let's think about how we can destroy the remaining evidence." You leave first, and I'll think about how to improve it. ”

The woman snorted coldly: "I don't care about anything else, I just ask me and my son to get that property." If I get caught, everyone will not be happy. ”

She got up and left the place directly.

The man waited for her to leave, then turned around and began typing on the computer. The computer screen flickered and flickered, emitting a blinding white light, like a devouring light in the dark house, enveloping the black shadow.

.....．

.....．

Zhou Yunkai was recently grounded and could only wander around his home, and Zhou's father instructed the community security guards to keep an eye on them to prevent Zhou Yunkai from leaving the house too far.

He can't follow the criminal police team to handle the case, and second, he can't be too far away from home, and he can only rely on Lin Ming to pass on information to him, and then discuss it with Zhang Shaoan. Zhou Yunkai is very smart, just by relying on the information Lin Ming passed to him, he can guess a lot of conjectures that the criminal police don't know. And he has an advantage that no one else can match, that is, he knows that the mastermind behind the case is one of his opponents on the Internet, whose name is Y. And he also knows that Y is a very powerful hacker, hackers are a very mysterious group, they exist like ghosts on the Internet, they can often find a lot of things that others don't know, and call for wind and rain on the Internet.

Y once hacked into Zhou Yunkai's computer and told him that he was going to kill Hu Jie, so that he could find evidence of his crime and bring himself to justice. However, Zhou Yunkai thought that this was not a case committed by Y himself, but a murder plan that he contacted Hu Jie's enemies through the computer.

In other words, Y is at most the instigator behind the scenes, but he is not the real murderer. But there was no hair, no DNA, no fingerprints and all any pointing clues at the scene of the crime, and there were very few hints that could be given to Zhou Yunkai, which made him almost impossible to solve the case.

Real crimes and detectives solving cases are two different things, and today's case, let Holmes come over, and it is also blind. Because there is no suspect in the case, it is naturally impossible to investigate through ontological reasoning.

However, criminal psychology can help this case to a certain extent, but this case is an ordinary civil homicide case, and it is not enough to report to the municipal bureau for criminal psychology experts to help investigate. Unless he goes to the Public Security University in a private capacity or is invited by a well-connected expert to help, it's a pity that Fang Junlong has no friends in this regard.

However, Zhou Yunkai has some research on criminal psychology.

In the past few days, he has written a close-up of the murderer himself through all the information at the scene that Lin Ming transmitted to him.

1. The murderer was a man.

2. Height above 1.75.

3. Be physically strong.

4. Age between 25-40 years old.

5. Have a stable source of income.

6. Have a certain education.

7. Proper occupation.

8. Appearance does not have to be aggressive.

9. The hand holding the knife is very steady, and the profession may be a butcher or a doctor.

10. Have a habit of cleanliness.

The reason why it is believed that the murderer is a man and not a woman is based on the situation at the scene, and the murderer locked the door of the house after committing the crime and climbed down from the window. At this point, the criminal police have done experiments, Hu Jie's death on the third floor window, if you want to step on the anti-theft net on the second floor through the anti-theft window, you must grasp the anti-theft net on the third floor with both hands, step on the water pipe, let the body slowly droop down, reduce the inertia brought by your own gravity. Then wait for one foot to step on the anti-theft net downstairs, then release your hand and grab the lower end of the anti-theft net on the third floor, and slowly climb down. If it is a woman, one is not strong enough, and the other is not enough height. Because the anti-theft net on the second floor is close to 1.6 meters from the anti-theft net on the third floor, even if you step on the anti-theft net downstairs, if you let go of your hands and climb down, if you don't have enough strength, it is easy to fall directly from the upstairs. And if the height is not more than 1.75 meters, when you let go of your hands, you can't grasp the water pipe below, so you can't go up or down, and you will fall into a very embarrassing situation.

Unless the woman is strong, taller than 1.75, and as strong as an ox, she can hold her body in place with one hand, and hold the sewer pipe with the other hand and climb down through the pipe.

But there are few women with this kind of physical strength, and the characteristics are obvious, if the police investigate, it is still easy to find. Since there is no news so far, it means that this possibility is extremely low. Therefore, including the police, 100% of the murderer in this case must be a man.

Articles 1-4 on the profile are all derived from descriptions of the murderer's strength. Articles 5-10, on the other hand, are inferences made through the actions of the murderer. Because the murderer was very calm in the process of committing the murder, in the dark, he ended Hu Jie's life with a single knife, which shows that he is an extremely confident and even conceited person. He was sure that if this knife went down, Hu Jie would definitely die in bed, then Hu Jie would definitely die, and he would not have to make a second knife, or even check whether Hu Jie was dead. The murderer's murder must have been very short, and after coming out from under the bed to kill Hu Jie, he calmly cleaned up the crime scene. This shows that the murderer is a person who has a plan for life, so he must have a stable job.

If the murderer is not a well-planned, very self-disciplined person. Then he will not clean up all the possible physical evidence at the scene so carefully and seriously, and even the footprints on the anti-theft net will be clear and clean one by one, which has become a habit of life, and it can almost be said that he is self-disciplined to the point of perversion.

If people look at life, they may find out. Those who are unkempt, have messy rooms, and have no plan for themselves will definitely be perfunctory when it comes to cleaning. At most, you can just drag the floor casually, and you won't care under the bed at all.

Moreover, such people must have the habit of handing in for a long time, because they can't control themselves, and their own stopping power is extremely poor, and once such people are addicted to tobacco and drugs, it is difficult to get rid of them.

But this is not the case with the murderer in Hu Jie's case, the deceased's room is cleaned and organized, without a sense of clutter.

Such a person is by no means a perfunctory lazy man who can do it.

Therefore, Zhou Yunkai feels that this profile is not far from ten. As for the profession, he is more inclined to be a doctor. Think about it and know that between the butcher and the doctor, which will be more self-disciplined and more clean, normal people will tend to the doctor. The environment in which the doctor lives, where bacteria grow, is actually much dirtier than the environment in which the butcher lives. Imagine a surgeon with a scalpel, who has to face such a dirty environment every day, how can he not like to be a little cleaner on his body? In addition, if you can be admitted to medical school, which is not an excellent student with excellent grades, if you don't have self-discipline and no planning, how can you get good grades and be admitted to a good medical university?

Just like Zhang Shaoan and Zhou Yunkai themselves, in fact, it is a true portrayal of this kind. If you look at their room, you will find that their room is very neat and clean, and even if Liu He's room looks messy, in fact, the musical instruments are arranged very regularly, there is no dust, and it is not messy at all.

Looking at the rooms of Huang Anwen and Fan Lei, those who don't like to read, there must be a thick layer of ash on the desk. I don't read books often and I don't tidy up the house. Even if it is clean, it must be the mother who does the housework who helps with the cleaning.

Therefore, this profile made by Zhou Yunkai is completely based on facts. If the police are asked to investigate now, through this profile, he has a more than 80% chance of finding the murderer.

But this is the premise that there is no Y participation, Y is a person whose IQ is no less than Zhou Yunkai, and he has a very good way to act.

If it were him, he would definitely help the murderer think of a way to get rid of the investigation and suspicion.

And this method, Zhou Yunkai has never thought of.

So he has never dared to act rashly.

After discussing with Zhang Shaoan for a long time, the two deduced that the murderer had the following characteristics.

1. Have a computer at home.

2. Appearance is affinity, and may even be a good gentleman, in daily interpersonal relationships, the reputation is very good.

3. The profession is legitimate, and there is a high probability that he is a doctor. Cleanliness, self-discipline, conceit, more concerned about social influence, and living a very decent life. complained about Hu Jie, it is very likely that Hu Jie lost his face and hurt his self-esteem.

4. Be in good health and have the habit of fitness or exercise.

Zhang Shaoan doesn't understand mental profiling, but he understands logic. Logically, a butcher may be physically strong enough to climb between windows with ease, but the butcher is not necessarily disciplined, nor is he necessarily as calm and calm as the murderer in this case.

Murder is not about cutting pork on the board, so at least it shows that after all this, the murderer can have time to think and clean up the crime scene, which means that he is not only physically strong, but also smart and very flexible.

This is a contradiction with the previous inference that Y's life is that Y stays in front of the computer all the year round, and neither Zhang Shaoan nor Zhou Yunkai knows Y's source of income, nor does it know whether Y is male or female.

But what is certain is that since Y can soak in the Internet 24 hours a day, he must not have time to exercise.

Then, this can also reflect that Y is not the direct murderer in this case.

The presumption that the natural murderer had someone else is established.

Some people may say that Zhou Yunkai and Zhang Shaoan deduced so many things without leaving home, without any clues at the scene, which is a little too fake. But in fact, if you change to a professional criminal psychologist, there may be more reasoning.

Because criminal psychology is a magical profession.

In 1956, Dr. Brussels made a perfect mental profile of the famous bomb maniac Mittsky by reading the newspaper. When the police caught Mitsky, they found that not only did Mitsky's features look exactly like those depicted by Dr. Brussels, but even Mitsky would have worn a double-breasted tunic with buttons that were buttoned up and matched perfectly. This case made Dr. Brussels famous, universities rushed to give lectures, and at the same time, Ph.D. was often asked to solve the most difficult cases in the country, so that criminal psychology was taken seriously by the police around the world, so that this discipline was officially applied to modern criminal investigation and solving crimes.

It can be said that with this discipline, the difficulty of solving the case has been greatly reduced.

It's just that Zhou Yunkai belongs to studying this technology in his spare time, and it is definitely unrealistic to say that his level is higher than that of criminal investigation experts and university professors in the province. So he can only deduce so much at the moment, but in his opinion, this clue should be enough. All that remains is to find Y's way to let the murderer evade the investigation.

"What kind of trick will Y use to make the murderer evade investigation?" Zhou Yunkai looked at the sky, the rainy days in the past few days have a tendency to stop, and the rainy season will soon pass, but the haze in Zhou Yunkai's heart is getting thicker and thicker.

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