Near noon, Ji Yue and the others finally checked the last point, and naturally the ending was still not found.

It seems that they will check all of them in two or three days at the earliest, and four or five days at the latest.

If you can't catch it then, summarize it again, and it's time to leave.

"You guys go to another district, and call me again if you have something. Bai Song originally wanted to ask them to have lunch, but Ji Yue and the others were going to a meeting again, so Bai Song didn't stay.

There is really no way about this matter, most cases in the world are like this.

How to catch a fish in a muddy ditch?

Drain the pool – check it one by one;

Fishing over and over again with a net - screening;

Fishing with a hook - lure enemies into appearing;

Use high technology to go in and track - technical reconnaissance;

Installation of fixed-point sensors - surveillance video...

Actually, there isn't much difference.

It's just that some pools are too big and the water is too mixed to catch.

Some ponds are too big to be drained, so it is impossible to catch 100% of the fish by other means.

Of course, someone said, is it okay to pour medicine into the pool?

Okay... This is converted into reality, called nuclear bomb washing.

Whether it works well or not, who uses it knows ...

Leaving from here, on the way to Tiannan District, Bai Song received a call from Liu Shuyuan.

"Is it convenient for you to answer the phone?" asked Liu Shuyuan.

Bai Song didn't drive, he was taking the subway, "It's inconvenient, it's full of people." ”

"You're going to the bar? so noisy? oh... Subway. Liu Shuyuan heard the voice of the station on the other side of the phone, and then said, "Do you have headphones?"

"Yes, I put it on. Bai Song took out the headphones from his pocket.

"You get off the train at the next stop, find a place where no one is, put on headphones and talk to me. Liu Shuyuan said.

"Where is there no one in the subway station?" Bai Song was speechless.

"Okay, don't say what you shouldn't say, wear headphones, listen to me, just express yourself as you like, I can understand." Liu Shuyuan said.

"Okay. Bai Song put on his headphones.

"Do you still have a very powerful network in Tianhua City?" Liu Shuyuan asked: "If you have, just say it, don't hide it at this time, I have no way to get you to the city bureau." ”

"This... Not really, you know everything I know. Bai Song said.

"Ma Donglai is the biggest leader you know?"

"It's a good relationship, that's it. ”

"Yes, I believe you at your word. Then let me ask you, do you know the previous Director Zheng of the Criminal Investigation Bureau?"

"Recognize. ”

"Damn, it's okay to retire! Why don't you mention this?"

"I've met twice, just to know. ”

"Huh?" Liu Shuyuan was a little confused: "When he was discussing at the city bureau today, he also mentioned your name. ”

"I met this morning, maybe he was in a good mood. ”

"Well, that's right. These veteran leaders, especially those at the department and bureau level, have recently been called back to study. Of course, people didn't make mistakes, they were all former bosses, peach and plum all over the world, although they came back to study, but learning can only be a part, and the city bureau also has to condolence by the way. Liu Shuyuan said: "There was also a condolence meeting in the morning, and during this period, when chatting, Zheng Ju talked about you and praised you." ”

"Huh?" Bai Song was also stunned for a moment, could it be that one of his own talents was discovered by him?

"At their level, even if they retire, they won't talk nonsense. Liu Shuyuan said to Bai Song: "Zheng Ju is Ma Donglai's master. ”

Only then did Bai Song know what was going on.

I'm afraid that when Ma Dong came to visit Zheng Ju, he also talked about him. Zheng Ju is also interested in some big cases, which has been a habit for decades, so when Ma Dong comes and goes to Zheng Ju, Zheng Ju must ask. And the big cases in Jiuhe District in the past two years have more or less white pine.

No wonder Zheng Ju called out Bai Song's name all of a sudden, daring to love is like this!

"Is that a good thing or a bad thing for me?" Bai Song didn't understand what was going on.

"Of course it's a good thing. Liu Shuyuan said: "The big guy praises you, which is more useful than your director writing ten reports for you, especially at this juncture, these retired old leaders actually don't talk nonsense, but it shows you." ”

Liu Shuyuan paused: "The rest is up to you to come up with some real skills." ”

"Okay, thanks, I see. Bai Song hung up the phone and secretly admired.

This interpersonal network is too complicated, and Liu Shuyuan even knows this, which is really amazing!

...

Now, now, it's time to gamble your luck!

Most detectives find out who the murderer is through reasoning, and then, the murderer is nearby, and they can be caught directly.

But what if the murderer runs away? Can you deduce where the murderer is by reasoning?

It's possible in a short time, but after running for eight years, it's impossible, and it's not something that detectives can solve.

Some things can only be done with consistent effort and collaboration.

...

It's just that Bai Song doesn't know that this thing is so difficult!

These two districts, dirty and messy, are really a lot.

Many people are accustomed to tall office buildings and bright lights, but they don't know that any city, even the urban area, still has this kind of place.

Needless to say, Tianhua City, even if it is Shangjing and Demon Capital, in addition to the most core area, there are many such places in other areas.

Moreover, such places have a common feature - many passages.

Some of the tube building communities, a large corridor on the first floor, dozens of households on the first floor, out of the community, there are dozens of passages.

Now the monitoring has become more and more complete, which is why the number of monitoring in these places is amazing.

In the past few days, Sun Jie has to go back to prepare for the wedding, and he will get married on Saturday. Bai Song and Wang Liang never stopped for a moment, and kept adjusting videos everywhere.

With just the two of them, it's too hard.

A few days later, on Friday night, Bai Song and Wang Liang were working together on hundreds of gigabytes of footage copied from a dozen video points today, and then used software to compare them.

During the day, people are busy all day, and they retrieve the day's data. In the evening, the computer is busy all night, and it is automatically compared.

"It would be nice to have a fully automated face comparison system. Bai Song sighed.

Unless each camera is installed with optical fiber to the headquarters, in order to be more convenient, in fact, it is best to use the wireless transmission of encrypted frequency bands, but now the cameras are getting more and more high-definition, this kind of place with thirty or forty cameras in a community, the amount of data per second is more than 10MB, and the current 4G network is still difficult to support. And the video definition will get higher and higher, and the data will get bigger and bigger. Wang Liang said: "Now we can only do a certain degree of pilot, but when it comes to citizen privacy, there are also some difficulties." ”

"Well, unless there's a faster transfer protocol. Bai Song nodded, "However, the confidentiality of this kind of big data transmission is still the first, and I don't know which country will be the first to break through in the future, and I am most assured to use my own talents." ”

"It's okay, now there are still more short-distance transmission or wired transmission with wireless networks, faster transmission protocols require greater base station density, and tariffs are not cheap in the short term. Wang Liang was talking while skillfully operating the computer.

Bai Song didn't bother him, and after a while, he pointed to the mobile phone on Wang Liang's desktop: "Your mobile phone is ringing." ”

"Pick it up for me. "Wang Liang is operating the computer.

Turning on the phone, Bai Song heard a familiar voice: "Wang Liang, your hemorrhoids are not healed, are they?"