"Team Yan, I'm here." In a corner of the office, Liu Wenyu pretended to be very natural, dialed Yan Feng's phone number, and said suicidly: "There's nothing wrong with you over there, right?" ”

"It's okay, this is just a small case, but the nature is a bit special, that's why I was sent here to preside over the situation." Yan Feng said: "What you observe, how are you observing?" ”

"That, Team Yan, after my recent observations, I still don't feel that there is anything suspicious about Teacher Wen." Liu Wenyu thought for a moment and replied: "First of all, in the process of solving the case these days, although Mr. Wen is extremely mysterious, even to the point of only using voice calls and voice changers to help solve the case, but it does play a role in the detection of the case, and just now, he broke the eighth layer of encryption one step ahead of everyone - if he is really a criminal, how can he cooperate with the police investigation like this?" ”

"If it's like what I imagined, the more he cooperates with the police, the more he does his best, and the more he looks like the 'Yunxiang Murderer' I've been looking for all these years."

"Where does this begin? In this way, those witnesses who actively provided information to the police, as well as those residents in the vicinity, are not all suspicious? Liu Wenyu's tone was full of doubts, and he asked puzzledly: "Why is there a suspicion of 'Yunxiang Murderer' when he assists the police in handling the case?" ”

"You don't know anything about this matter, of course, very few people know the details of the 'Yunxiang Serial Murder Case', and it's also because I didn't tell you." Yan Feng chuckled, and then explained: "In the previous investigation, we found that the victims of the 'Yunxiang Killer Demon' case were almost all criminals who committed various cases, even those who had not committed crimes, and in the follow-up investigation, it was confirmed that those people had their own crimes - that is to say, the people killed by the 'Yunxiang Murderer' were all criminals? ”

"It's ...... Black eats black among criminals?! ”

"No, it's worse than that. Cloud Township Killer'...... It is quite possible to think of yourself as a messenger of justice. Or rather, he thinks what he is doing is righteous. ”

"How can it be ...... like this" Liu Wenyu was speechless for a while, and he was speechless.

"That's right, this is the profile of the criminal profiler at that time for the 'Yunxiang Killer' himself, although the truth may be a little different from it, but the 'Yunxiang Murderer' specializes in picking criminals, this is a fact." Yan Feng smoked a cigarette and said: "Because of this, the 'Yunxiang Murderer' I expected, if he really learns about this case, he will definitely have a strong interest in it, so if there is an opportunity to enter the police force to assist in the investigation at this time, I believe he will definitely not refuse." ”

"In other words, Teacher Wen agreed to the captain's request without hesitation?" Liu Wenyu couldn't help but fall into deep thought, "That's indeed a little strange......"

"On the contrary, he wanted to reject me." Yan Feng interrupted him, "When I first spoke about this request, he thought that he was just an ordinary civilian, and if he followed the police force to investigate, if he was retaliated against once he leaked his personal information, it would be an irresponsible result for his family." ”

"Yes, Teacher Wen still has the daughter of a distant relative at home, so it is indeed not suitable to join this kind of action." After thinking about it for a while, Liu Wenyu said: "And Mr. Wen is indeed the kind of person who has a sense of responsibility, and it is reasonable to be able to say these words." ”

"Indeed, but I always suspect that his answer is a bit too crisp," Yan Feng sighed lightly, "His answer gives me an extremely perfect feeling, this is a very official reply, and such a perfect answer was answered almost immediately, if it weren't for his quick thinking, could it be that he would have guessed that I would test him with this?" ”

"But anyway, Mr. Wen agreed to assist us in the investigation after repeatedly confirming that his identity would not be revealed, so this should be true." Liu Wenyu said.

"I don't know why, it's because of Xiang Haisheng's influence, or something else, I find that I'm gradually becoming suspicious now." Yan Feng pondered for a while, then continued: "Do you know what kind of characteristics successful criminals have? ”

"There are dozens or more of unsolved homicides every year in the country – these cases may be solved in the next five years, but if they exceed five years, they will be difficult to solve. At this time, there are basically only two situations, one is that the suspect has been identified, but he can't be caught and disappears; This is the situation of the 'Yunxiang Killer'. And the second is that after all these years of work, it is impossible to identify the suspect. ”

Yan Feng said slowly, as if an experienced police officer was teaching experience to newcomers: "The first one obviously does not conform to the concept of success, and the second type cannot all be classified as the concept of success, because these cases of the second type are caused by many factors, such as the professional ability of police officers in backward areas, such as the fact that the corpses in remote areas have been separated for a long time when they are found, and most of the physical evidence has been lost. Only those criminal suspects who are carefully planned and carried out by criminals, and who have a strong sense of anti-investigation, evade or even mislead the police to investigate, can be counted as successful criminals. ”

"Obviously, after understanding this case, you should think that the 'Yunxiang Murderer' is also the first case! But the question arises, why was such an unsuccessful criminal able able to escape for such a long time? Ten years have even passed, and there is not even a single frontal photo? ”

"After thinking about it day and night, I thought of a possibility - what if this was just what the 'Cloud Township Killer' wanted us to think? Because in the previous detection, the cunning shown by the 'Yunxiang Killer' is not comparable to that of ordinary serial murderers. ”

In this way, he is one of the most successful criminals. However, who are these successful people? I don't know, I guess no one knows, because the case can't be solved, and the suspect can't be determined, so they hide their merits and fame, lurking around everyone, maybe it's the taxi driver you drove you tonight, maybe it's the fast food restaurant service guy who just told you to welcome you back, or maybe it's the blind date you just met and you're a little satisfied. ”

There was a bit of solemnity between his eyebrows, and Yan Feng then added: "Through the case mentioned above and your own experience, it should not be difficult for you to find out the characteristics that a successful criminal should have. ”

"First of all, one person commits the crime, because only he will not betray himself; And you have to be decisive, you can't do anything without courage; Most importantly, keep your composure. Must have a strong psychological quality; Finally, the so-called timing and place are right, because a good fortune can overcome all adverse factors. ”

"To sum up, we know that most people make a mistake when discussing successful criminals, that is, why do those successful criminals get caught? What kind of mistake was made that led to their being caught, it was a fatal mistake, so they didn't succeed because of this mistake. Snuffing out the cigarette butt, Yan Feng made his own conclusion, "In this way, Mr. Wen almost fits all the characteristics of a successful criminal, and coupled with his suspicious places during this time, this has caused me to be suspicious of him." Moreover, his response to my temptations was so perfect that I couldn't believe it, which is why I will always be attached to him, because this perfection is the most doubtful. ”

"Having said so much, Team Yan, what do you think is the probability that Teacher Wen is a 'Yunxiang Killer'?" Liu Wenyu asked.

"Only ten percent, Xiao Liu." Yan Feng pondered for a while and gave the answer: "However, in fact, in the past ten years, there has almost never been anyone with such a big suspicion, so even if it is only ten percent, it is necessary to investigate deeply. ”

"But Team Yan, you also said that the 'Yunxiang Killer' is a perfect person." Liu Wenyu added, "But since Mr. Wen's various behaviors make Team Yan suspicious, this can't be said to be perfect." ”

"A wise man thinks a thousand times, will there be a mistake? No...... No," Yan Feng looked at the noon sun and said slowly: "If he is really the 'Yunxiang Killer Demon', I'm afraid these behaviors are to ridicule us for only having suspicions, but not being able to produce evidence!" ”

"Anyway, please keep an eye on his behavior, I want to know all the details."

"Okay......"

………………

- This time I conducted a secret investigation, and I received a lot of goods.

Lin Yunqian put his hands in his pockets, still wearing the black leather coat, he walked quietly on the street, and under his cynical expression, there was a rapidly spinning brain.

- The password, all those who witnessed it, without exception, mentioned it.

At this moment, he was almost certain that the "writer" would have noticed the case.

- If it is really like what they say, then this case is ostensibly a murder case, but in fact, it is a challenge to the police by the murderer.

In this way, the murderer this time will inevitably be noticed by the "writer" who likes to explore other people's stories, and with the ability of the "writer", he will inevitably be able to get more information in the police station - in that case, the "writer" will definitely not let this criminal go.

- More importantly, after a joint analysis with the teacher, I reached a consensus with him, that is, the "writer" is a competitive person, and it can even be said that he is a very naïve person - when he thinks that he is behind others in a certain aspect, he will try to win back a game, and it doesn't matter even if he exposes himself.

- What's more, the "writer" will show a hundred, a thousand times more proud than a normal person after feeling that he has mastered the whole situation - that will make him get carried away, and thus reveal flaws that would not normally be possible.

Through the analysis of cases led by "writers", these two points are the only weaknesses of "writers" analyzed by the two.

Because of this, Lin Yunqian is almost certain that the "writer" who has been put on his own side will definitely want to find another opportunity to confront him head-on, and he must win back a game.

And undoubtedly, this case is the best opportunity, in other words, even if there is no case, the "writer" will definitely create an opportunity. And now that there is this case, the "writer" must think that he has noticed this case, so there is no reason why he should not work on this case.

That way, everything will go smoothly.

Password killing, although it is impossible to get more information, but this is enough, and the rest of the information can already be obtained through reasoning.

- What was published in that newspaper should be the password for this case!

The corners of his mouth slowly hooked up a trace of arc, and Lin Yunqian couldn't help but smile.

Just after unlocking the code of the newspaper in the morning, and the information related to the password was learned during the investigation at noon, it is easy for people to connect the two by habitual thinking.

But Lin Yunqian doesn't want to stop there, he doesn't want to make too many assumptions, because he always keeps in mind the teacher's teaching: remember the "Occam's razor".

For each additional premise required for a theory or conjecture (all theories are conjectures in the first place), the applicability of the theory or conjecture, or its field of application, is reduced by one point, and the slightest change in any condition will make it untenable. This is Occam's razor theorem, which is also something that Lin Yunqian has been paying attention to.

Because of this, in order to confirm this conjecture, he ran to the library and the old newspaper processing yard and walked around, found the original month's "Yunhe Daily", carefully observed the content of the puzzle column in it, and soon came to a conclusion - the latest issue of the puzzle is very abnormal, and the previous puzzles in the newspaper are almost all for the sake of making people laugh, not at all like now, and even have a huge prize.

In this way, compared with the time of the crime, he soon came to a definite conclusion - these passwords are the passwords left by the murderer at the scene of these cases.

But then there are more problems.

If the police released this information, it could only represent two things: first, the police were powerless to crack these codes, and could only turn to the power of the public; Second, this is the criminal who asked the police to announce it, and came up with some things to force it.

The first point can be ruled out directly, and it is impossible for the police to be powerless to crack it. In other words, if the police can't crack it, mobilizing the masses will not help at all, not to mention that the bounty is too small.

The only possibility is the second point, that is, the criminal used some means to threaten the police to publish the passwords, but if this method is true, then the target of the criminal is not the police.

It's someone else.

Anything else, not inside the police.

Who is it that deserves to challenge the criminals who have spent so much effort to even kill people?

Let's broaden our minds a little more.

The "writer" was responsible for writing reports about the cases, and the cases and passwords were approved by the police, so there should be no problem if it could be seen that the "writer" had established contact with the police.

- "Writers" are able to meddle in police operations in a sense.

- The "writer" has penetrated into the police.

- The criminal wants to challenge someone who is ostensibly not inside the police.

- The "writer" is ostensibly not inside the police.

"Does he want to challenge ...... 'writer'?" For some reason, a certain idea seemed to take root in Lin Yunqian's heart, lingering.

- If he really wants to challenge the "writer", then the person who, in addition to the police, can obtain the code and actively decipher it, is suspected of being a "writer".

But now, the police have released the code and promised a big prize to motivate everyone to think and decipher it. This kind of action undoubtedly makes it more difficult for oneself to find the "writer", and it also makes the identity of the "writer" even more hidden. Therefore, put aside everything and look at the essence. Obviously, this operation, the "writer" is the biggest beneficiary.

- The "writer" can interfere with the actions of the police in a certain situation, and the police's act of publishing the password helps the "writer" hide his identity, so to speak......

"It was the 'writer' who made the password released by the police...... Is it? Suddenly connecting everything, Lin Yunqian's pupils dilated slightly, and at this time, he didn't know that what he guessed was extremely close to the truth.

In this way, it is likely that the police never received the threat to publish the password, or that they did not intend to publish it, but after the "writer" interfered with it by some means, they chose to publish the password.

- And in the first case, it turns out that the person's target may not be the "writer", but the police. But the probability of such a situation is low, because it is clear that the "writers" do not have that level of control over the police.

- And if it is the second case, then it is certain that the murderer has almost a ninety percent probability of targeting the "writer".

- Then the person you are looking for should have contact with the police, and the speed and strength of deciphering the code are far beyond ordinary people!

"In this way, it seems that I have a greater advantage than 'writer'! After all, that guy Wen Yifan is also a genius who is proficient in classical ciphers, and he can be my biggest help! couldn't help laughing, Lin Yunqian secretly thought in his heart: "However, it's better not to reveal your identity now, if you let the 'writers' know all this, it is very likely that they will do something." Wen Yifan is just an ordinary person, so he still uses 'looking for a job' as an excuse to hide his ...... in the morning"

"! Let Lao Tzu see you again! Now there are more than a dozen of us, and I don't believe that you can still be strong! ”

A brick flew suddenly, and Lin Yunqian quickly dodged it, only to find that he had already been surrounded by them.

Looking at the people slowly surrounding him, Lin Yunqian sighed helplessly.

- I always feel that saving Wen Yifan seems to be a loss?