Not surprisingly, the detective actually found nothing, and the surveillance footage near the unit building where the crime occurred was "frozen", and nothing could be found.

Just like the surveillance in the office building of the criminal investigation brigade of the county bureau.

However, not all the monitoring positions in the community have been frozen, so it is too fake and easy to see. Just like the office building of the criminal investigation brigade of the county bureau, there are only a few surveillance screens that have been passive.

And only last night from 9 p.m. to 5:50 a.m., and from 7:30 a.m. to now, it was frozen. From 5:50 a.m. to 7:30 a.m., for nearly two hours, the monitoring was also normal.

Thinking about it, the sun is just rising during this time, and the sky will be bright, and the picture of the night is still fixed, and it is easy to reveal flaws.

Several map detectives marked the monitoring sites that were motionless one by one, and then connected them into a line on the map, and also deduced the path of the suspect in and out of the community and the scene of the crime.

It just doesn't seem to make much sense.

When Qi Yuan relayed this discovery to Su Ping, seeing that he was silent for a long time, he said: "Team Su, I personally feel that there are more than fifty percent of the cases related to the gas leakage and ignition incident that occurred in the brigade. ”

"Hmm." Su Ping nodded: "Fix the monitoring screen...... In general,It's not a too clever operation.,It's not unheard of in the past.,Even more clever.,The method of looping the monitoring for a certain period of time in an attempt to deceive us has also been used by murderers.。

I have asked professionals, the method is not difficult, the key is to see if you can think of it. In both cases, this method was used, and the probability that the perpetrators saw the same thing is not very high, and it is more likely that the same group of people wrote it.

And there is also a difficulty, that is, how to hack into the monitoring system.

Needless to say, the security monitoring is either not directly connected to the Internet, or it is connected to the intranet, which is physically isolated from the Internet, and no matter how superb the hacker technology is, he does not want to remotely invade it.

Unless they use a terminal device that is connected to both the internal and external networks as a bridge. Or, without intervening in the intranet, a terminal device connected to the external network can be connected to the monitoring system. Of course, you can directly touch the monitoring room and directly operate several monitoring probes.

As for the community monitoring, I asked when I came, and their monitoring system is not networked, only for local preservation.

In summary...... If you want to engage in monitoring, whether it is a safe point, a remote access to a device, or a risk to operate directly, you must have an 'internal response' to operate.

Among them, the county bureau brigade has their people, which is reasonable. But if the property in the community is also installed, it is a bit exaggerated and completely unnecessary. So I think someone should have access to the community monitoring system under some reasonable pretext to make it easier for them to do it.

In all probability...... It was a colleague in the team who transferred the monitoring of the community on the grounds that the case was needed, and took the opportunity to do things.

Of course, theoretically, to obtain physical evidence such as surveillance, you need a letter of introduction, a notice of evidence collection, and a copy of the police card. But in general, non-public units, such as community properties, basically we say it verbally, they will not be embarrassed, after all, it is not a big deal, and they have nothing to lose.

So if you want to find out this person procedurally, I'm afraid it's impossible. Fortunately, this should not have happened too long ago, at most a week. Then the security guard should have an impression. ”

Hearing this, Qi Yuan immediately said, "Then let people ask the security guard?" ”

Su Ping nodded: "Well, but don't make a noise." You send a message to Xiao Wang, and ask him to see which of our colleagues in the second squadron are free, and arrange to visit, so as not to startle the snake. ”

Qi Yuan blinked: "Wouldn't it be good to let our colleagues in the trace inspection ask directly?" ”

Su Ping: ......

After a few seconds, he slowly turned his head away, coughed dryly, and said, "Then you can call someone." Remember, don't use a walkie-talkie, just make a phone call, send a text message, or WeChat. ”

"Okay." Qi Yuan immediately took out his mobile phone and made a call.

Although Su Ping said that it is okay to text WeChat and send a text message, there is no guarantee when it will be seen, so it is better to call directly.

The other end was quickly connected, Qi Yuan said something, and said that Su Ping had explained.

A few minutes later, Tu Zhen returned the phone, and Qi Yuan immediately answered and turned on the amplification.

They reported a name——Tong Haojie,And,After reading the monitoring out, it was also found that he did come to the monitoring room last night,Tinkering for a while。 Since then, the footage of several surveillance cameras in the community has been frozen, and it was not until 5:50 a.m. that there was movement again, and it was frozen again at 7:30 a.m.

Obviously, in just a few moments, the surveillance should have been implanted with a program to manipulate the surveillance footage.

It should also be added to the program of opening and closing at a regular time, so as to unfreeze at dawn, so as not to light up other surveillance screens, and these cameras are still black, thus arousing suspicion.

In general, the difficulty is actually not too big, as long as you can think of it, you can always get the program out.

"Tong Haojie......" Su Ping frowned, and said with some confusion: "How could it be him?" What's going on? He joined forces with outsiders to kill his family? Impossible, right? Is this kid so ruthless? ”

Qi Yuan shook his head and said he didn't know.

Su Ping snorted, pinched his chin again, and tangled.

After two minutes,He looked at Qi Yuan again:"Call over there again,Ask clearly,Is it only Tong Haojie who has been to the monitoring room recently。 In addition, ask carefully,What did Tong Haojie do in the monitoring room...... Forget it, the left and right monitoring rooms are also next to Gate No. 3, but it's not far, let's go straight over. ”

"Okay." Of course, Qi Yuan didn't have any opinions, when he opened the door and got out of the car, he and then walked to the monitoring room with Su Ping.

After walking for about two hundred meters, three or four minutes, I arrived at the monitoring room.

At this time, in the monitoring room, in addition to the two security guards, there were only two detachment detectives Liu Xun and Xiao Zhao. As for the brigade's map detectives, they found an excuse to send them away as early as when they arrived.

"Team Sue." When Liu Xun and the others saw Su Ping, they immediately got up to say hello.

Su Ping waved his hand and asked, "Except for what you just reported, you didn't get anything?" ”

"Nothing." Liu Xun shook his head slightly.

"Well......" Su Ping frowned slightly, but he was not disappointed, after all, he had been prepared, so he went straight to the point and arranged tasks for them, saying: "In this way, you guys will check it carefully, and ...... in the near future Let's take a month for the time being, and check whether other colleagues have been to the community and entered the monitoring room during this time. ”

"That ......" Xiao Zhao scratched his head and said softly: "Team Su, the monitoring of this community is only kept for twenty-one days......"