After Lin Ming came out of the criminal police team, he met Zhang Shaoan outside.

The Chengguan District Criminal Police Brigade is diagonally opposite the Wuxing Road Police Station, in a courtyard with the fire brigade, which is an old street and alley, and there is a commissary next to it.

Zhang Shaoan bought two bottles of iced tea at the entrance of the commissary and sat on the bench at the door and drank it.

Lin Ming walked over, took the iced black tea handed by Zhang Shao'an, glanced at the hot sun outside, unscrewed the lid and took a sip. After the feeling of comfort was gone, he pursed his lips and said, "An Ye, what's the matter." ”

Zhang Shao'an was wearing a pair of flip-flops, dressed unkemptly, stood up and said, "Kaizi estimates that he will come out later, let's find a place to sit and talk while walking." ”

"Hmm."

Lin Ming knew that this was not the place to talk about things, so he nodded and followed Zhang Shao'an.

The two of them walked on the side of the road, and there was a lot of natural sound around them, and there was a construction site in the distance, constantly making the sound of construction. Ensuring that no one could hear what they said, Zhang Shaoan said as he walked: "Kaizi was cheated, he went to the scene of the crime, and I helped him commit perjury." ”

"I guessed it." Lin Ming rolled his eyes and said, "You two are good babies in the yard, and you two will suddenly run to the KTV outside all night?" Fools can see that you are acting as a demon, why are you running to the scene of the crime? ”

"Kaizi was deceived and told that there would be a murder there at 3 a.m. this morning. However, Kaizi is not stupid, and guessed that there might be a trap there, so he called me to help. ”

"Won't you persuade him?"

"Why didn't you persuade me."

Zhang Shaoan shook his head and said: "You don't know Kaizi's character, if you really compete, the nine cows can't pull it back." He is obsessed with solving cases every day, and he is going crazy to study all kinds of criminal psychology and criminal theories all day long. When you suddenly encounter such an interesting thing, how can you give up? ”

Lin Ming nodded approvingly: "That's true, his character is like this, but since there is a criminal letter, why don't you call the police to go over together?" It can both stop the case and catch the murderer. ”

As soon as he finished saying this, Lin Ming regretted it, patted his forehead and said, "No, call the police over, it will definitely be difficult to solve the drug trafficking case, and Kaizi will definitely not call the police." ”

The drug trafficking case in which Zhou Yunkai participated was actually boring enough to have some fun in the explosion. If you really have to call the police, the drug trafficking case will definitely not be able to continue. Yuan Hao broke into Hu Jie's interior before and was collecting evidence of Hu Jie's drug trafficking. When the police come to the door at this time, they will definitely raise Hu Jie's vigilance and let the drug trafficking case end without a hitch.

And Zhou Yunkai actually doesn't care about Hu Jie's life or death, because it has nothing to do with him. All he cares about is the fun of the case itself, just like when he was so lonely that he almost fell into the devil and wanted to create his own case. If this kind of hard-to-solve murder really happens in reality, it would be desperate for him.

Zhang Shaoan said: "In fact, the main reason why I didn't call the police was because Kaizi and I weren't sure if it was a prank, and the consequences of reporting a false case were also criminally responsible." So Kaizi proposed to go to the scene to observe the situation first, and then call the police directly if something is wrong. ”

"It's too risky after all."

Lin Ming shook his head and said, "If you let him go alone, you don't want to think about it, what if he meets a murderer who is committing murder at the scene?" Something happened, and the consequences were unimaginable. ”

The two found a café, ordered two drinks, and sat down in a remote corner.

Zhang Shaoan leaned on the sofa and said: "It's not as dangerous as you think, Kaizi has repeatedly promised me that he will not go to the scene of the crime, but only find a night food stall around, ensure that there are many people, and secretly observe the situation in Hu Jie's house from afar." You know, reality and detective fiction are two different concepts, the detective in the novel keeps dying, but he goes in and out of the crime scene unscathed, that's a fictional plot of the novel after all. When encountering such a thing in real life, the murderer will probably be tempted to kill people a long time ago. Kaizi is not a fool, knowing that there will be a murder there, and still drilling into it, isn't it self-defeating? ”

Lin Ming nodded.

It is true that Zhou Yunkai is obsessed with crime and solving cases, but it does not mean that he must run to the scene of the murder to watch. Witnessing the scene of a murder is not the same as watching from afar, and the murderer will do anything in order to kill people.

"Tell me how you got the waiter to make a confession? Paid to buy him? ”

An important factor for Zhou Yunkai to be proven innocent is an alibi. In addition to Zhang Shaoan's confession, there are also several waiters in the KTV and monitoring, which can prove that he has been in the KTV all the time at the time of the crime.

Zhang Shaoan shook his head and said: "How can it be spent on bribery, in the face of police interrogation, ordinary people are actually under a lot of pressure when they lie." A seasoned criminal policeman, when making notes, as long as he finds a little wrong, he can find clues. Even if we buy all those waiters, it is very likely that they will be found out, and our plan will be exposed. So those waiters must be telling the truth. ”

"What's that for?"

Zhang Shaoan smiled: "This question is actually very simple. I used a physical device to put Kaiko's clothes on the ringstand in the innermost part of the box, diagonally facing the TV with his back to the door, and then put the pre-recorded song into the microphone, so that I called the waiter to come in, and he mistakenly thought that someone was singing inside. ”

"Wouldn't it, that waiter is not a fool, and after watching it once, he completely believes that the person inside is a real person?"

"No, I'm at that time, and I'll call the waiter to come in every half hour or so."

"So many times without goofing?"

Zhang Shaoan smiled mysteriously: "Because Kaizi before would deliberately find an excuse to go out, hang in front of the nearby waiter, or appear under the surveillance, until the time period when he was leaving, he would call the waiter to come in once, so as to ensure that no matter which waiter it was, he would see his existence." ”

Lin Ming suddenly realized: "Understood, psychological suggestion." Kaizi actually went out for less than an hour. So you only need to call the waiter once in half an hour of that hour. Because the KTV is very dark, and Kaizi has been singing there before, so if you set up a shelf, he is used to thinking that it is Kaizi. ”

"Not bad, to be exact. I made a papier-mâché mannequin, put it on the table, and turned off the lights on the stage, just a little bit of the stage flash. The light would be very dim, and when the waiter came in, I deliberately got up to block his view. ”

Zhang Shaoan said: "Generally, the waiter of KTV will not enter the room, if you call him, he will only wait for you at the door." In addition, I stood up and walked to the door to pretend to talk to him, but in fact, I blocked his view, so he could only stand at the door and use the corner of his eye to catch a glimpse of the human back of the fake Kaizi through my shoulder. And because of the previous psychological hints, he would mistakenly think that it was really Kaizi still singing there. In fact, Kaizi had already entered the scene of the crime during that time, and not long after he left, Kaizi had already returned, and we put the mannequin and clothes in the backpack on our backs. Destroyed again the next day, flawlessly. ”

In other words, Kaizi only needs to call the waiter at 2:30, and after revealing himself to the waiter that he is a real person, he can go out immediately. Wait until 3 o'clock and you call the waiter again to prove that he was not at the scene at the time of the crime. By 3:30, Kaizi came back and could continue to call the waiter to deepen the impression. In this way, even if the waiters at KTV are very mobile, the few waiters near your box can ensure that everyone has seen you. For example, waiter No. 1 met Kaizi at 2:30, waiter No. 2 met Kaizi at 3 o'clock, and waiter No. 3 met Kaizi at 3:30. Mutual corroboration can achieve absolute alibi. ”

"Clever."

Lin Ming sighed speechlessly: "If you IQ team up to commit high-IQ crimes, it will be a bit terrifying. Physics, mathematics and psychology, the perfect alibi, the police can't do anything about you. ”

Zhang Shaoan smiled and said nothing.

Lin Ming pondered for a moment and said: "Let me guess, the KTV must have been deliberately selected, one is close to the place where the crime occurred, the second is to have an escape channel that is convenient for entry and exit, and the third is that the monitoring location is for you to figure out." ”

"Yes, the nearby monitoring location must be clear. Otherwise, this approach will fall short. So the elevator and the gate must not be walked, only the staircase escape route. This kind of place generally does not lock the escape route, and there will be no one to guard it, as long as you avoid the monitoring in the KTV, you can leave. ”

Zhang Shaoan said: "So we have to find a place with less surveillance, and do not point the camera directly at our KTV gate and escape channel." At first, I thought it would be difficult to find, but I didn't expect it to be easy. Most of the KTVs in this vicinity have very few cameras, and some even have almost none. After screening, we chose the KTV called Chaomaike. Because the entrance and elevator of this KTV are monitored, and there is also monitoring in the corridor. That would prove that we did come in, and stayed inside and didn't get out. Then Kaizi and I used our mathematical knowledge to find the blind spots of these surveillances, and when we changed our clothes, we could easily get to the escape route and go to the scene of the crime. ”

"Needless to say, you must have investigated the surveillance near the crime scene." Lin Ming thought for a while and said: "In fact, the monitoring in that kind of place is the most useless, with low pixels, poor night vision function, and relatively few of them." The most difficult part is how you get out of KTV, and it is not difficult to reach the scene of the crime, right? ”

Zhang Shaoan nodded.

In 2002, the installation cost of monitoring equipment was high, and the equipment itself was also very expensive, so it was not widely used. Like KTV, where monitoring must be installed, it can be seen that it is very little installed, this kind of thing is still an expensive high-end luxury in the people, and the general KTV cannot be installed at all, and it is not as ubiquitous as in later generations.

Road monitoring and area monitoring are even less. It wasn't until 2006 that it became widely available. Therefore, in Cloud City, except for the bustling areas around the city center, there are no monitoring facilities in many places. And even if some intersections are equipped with surveillance, because of low pixels, no night vision function, etc., there is no difference between the blind at night.

Therefore, the police in this era do not rely much on surveillance, and mainly focus on thorough investigation and social interpersonal relationships around the deceased. For example, the silver case also occurred in the downtown area, and it lasted for two years, but it was still not until 2016 that the prisoners were arrested.

This is because there was no surveillance at that time, and the fingerprint database, DNA and other network identification systems were not yet popularized and perfected, so many criminals took advantage of the loopholes. Because this kind of indiscriminate and random crime is the most difficult to detect and find the direction.

In later generations, there are surveillance cameras everywhere, and many of them are probes installed by the private sector, intersecting each other, and there are almost no dead ends in many places. Make it difficult for criminals to dodge all the probes.