Chapter 161： significant discovery

Zhang Ruiqing was arrested.

People in the secret laboratory, no one escapes.

All personnel were arrested.

Yang Bing came to the case, and Li Tianhu came to the case.

It stands to reason that the Yunxing side, who helped Yang Bing back then, and later arranged for someone to send money to Yang Bing, Scar, Jin Weiming, was also arrested.

Although this brother Scar was seriously injured because he resisted arrest, there is no way to interrogate him for the time being.

But at least people found it.

So, who else?

Could it be that the person who planned all this was not Zhang Ruiqing?

Who else is there?

trial room.

"Big brother... I really recruited, I really didn't hide it."

Yang Bing was really crying this time.

"You think, I even recruited Yang Bing to send the experimental body, what else can I hide?"

No hiding?

Ha ha.

Chen Yan sneered: "Two years ago, you were running in Yun Province, and Jin Weiming later sponsored you to open a club."

"After you come back, you will be responsible for delivering the test supplies and experimental subjects to Zhang Ruiqing's secret laboratory. Who ordered these?"

"How did the other party's test consumables enter Liancheng?"

"How did you get in touch with Zhang Ruiqing?"

"Yang Bing, what I need is the details!"

Chen Yan knew that Yang Bing did not lie.

And, as Yang Bing said.

He even explained the matter of smuggling experimental subjects, and there is nothing else he can't say.

However, if Zhang Ruiqing was not directing the whole thing behind the scenes.

Then, the black hand behind the tomb will use some means to direct Yang Bing.

The specific means, Chen Yan currently does not know.

Therefore, he needs Yang Bing to tell all the details.

"I met Zhang Ruiqing at his secret test base."

Yang Bing didn't hide it. At this time, fighting for leniency and making meritorious deeds were his only options.

According to Yang Bing, it turns out that every time the test consumables need to be transported or the experimental body needs to be transported, Yang Bing's phone will receive an instruction message.

"The other person's phone number changes every time, and it's never the same."

"The records are all on my other phone, in a locked drawer in my office."

"This is what Brother Scar explained to me, and let me act according to the instructions on the phone. I don't need to worry about anything else..."

Soon, the call that Yang Bing said was sent to Chen Yan.

meeting room.

It was still Chen Yan, Zhang Yunhu, Liu Qingshan and Li Hong who attended the meeting, and Qin Chuan listened in via video.

Click.

Projection switching.

"This is all the call records in Yang Bing's phone."

"Caller numbers are available everywhere."

Chen Yan was making a case report: "I originally thought that Zhang Ruiqing was the last mastermind, but during the interrogation, Zhang Ruiqing did not explain anything."

Chen Yan shook his head: "This does not conform to the psychological characteristics of ordinary criminals."

"Neither plead guilty nor refuted."

"The most important point is that the surveillance video we found in Zhang Ruiqing's laboratory has a big problem."

Yes, Chen Yan has checked the surveillance video of the laboratory.

Chen Yan checked the video in the monitoring room as soon as he didn't get the system reward for ending the case.

He found that in the past two years, Zhang Ruiqing had basically not left this secret laboratory.

Moreover, according to the oral testimony of two experimental assistants, this can also be proved laterally.

"So, if Zhang Ruiqing is the driving force behind all this, how did he do it?"

Click!

Photos switch again.

"So I interrogated Yang Bing again."

"Sure enough, there should be another person behind the scenes of all this."

"The other party remotely instructed Yang Bing to transport materials and experimental bodies through the phone."

On the screen, it is the place where the phone calls to Yang Bing have been made in the past two years.

"The matter of the other party was explained to Yang Bing by Jin Weiming, who had been arrested in Yunxing."

"I just got in touch with the detective team over there. Jin Weiming is seriously injured and is still in a coma, so he can't be arraigned."

"So, at present, this person is only us to find."

"And only by finding this person can we understand the ins and outs of the entire chain."

For example, how did the test material come in.

Who the **** gave Yang Bing the cash?

And Zhang Ruiqing's cheating death, who planned it, and what secrets were hidden inside.

Otherwise, since the other party can direct the death of Zhang Ruiqing, then he can also direct the deaths of Li Ruiqing and Wang Ruiqing.

As long as the other party has the experimental data of Zhang Ruiqing in the past two years, everything will be restarted, but it is only a matter of time.

Therefore, finding the mastermind behind the scenes can end everything.

Qin Chuan in the video nodded: "I agree with Chen Yan's analysis."

"According to the current clues, Zhang Ruiqing faked his death to escape, in fact, to get rid of the school's investigation."

"Furthermore, the fire in the library of Liancheng University that year, now it seems, it should not be an accident."

"The other party is for Zhang Ruiqing's research materials."

"Moreover, it is very likely that the other party has all the relevant information about Zhang Ruiqing's research on the other side of the flower in the past two years."

"If this person can't be caught this time, as long as the other party can find a chemistry expert, everything may come back after a period of time!"

Zhang Yunhu also nodded.

"The current clues are mainly in two aspects."

"One is Zhang Ruiqing. He probably knows the mastermind behind the scenes."

"However, Zhang Ruiqing's interrogation was at a bottleneck. This man didn't say a word, no matter what method he used, he didn't open his mouth."

"So, in a short period of time, it is difficult to find a breakthrough from Zhang Ruiqing."

"The other is this set of phone numbers."

"According to Yang Bing's account, every time the other party talks to him, he uses a voice changer, so he can't distinguish between male and female and voice characteristics."

"But, look, everyone!"

Zhang Yunhu operated the computer to cast the screen: "The phone number used by the other party is from all over the world. The 36 phone numbers here come from 36 different cities."

"If, I mean if, we connect 36 cities in chronological order, and then check the people who have been to these 36 cities in this order through the ticket purchase records of planes and trains."

"Is it possible to lock this person?"

Li Hong and Liu Qingshan's eyes lit up.

It's stupid, but...

The way is possible.

However, this data query volume is too large.

But also to coordinate planes, trains and other fields.

Time consuming and laborious.

Zhang Yunhu obviously knows this problem: "Of course, this method is just a method that has no other way in the end."

"But, there is another way!"

Everyone looked at Zhang Yunhu: "That is to query the initial access base station of these 36 phones!"

Base station!

As soon as these two words came out, Chen Yan and the three immediately understood what Zhang Yunhu meant.

This has to do with how cell phones work.

In order to make outgoing calls, the mobile phone must first be within the range of the base station.

Because, due to its small size, the baseband of the transmitted signals carried by the mobile phone are all short-wave signals.

Such signals cannot transmit information over long distances.

Therefore, the relay of the base station is required.

Why is the communication effect of mobile phone sometimes good and sometimes not so good?

Even, sometimes, when the signal is not good, standing at a high place can make a phone call?

The reason is the base station.

No matter what kind of mobile phone it is, as long as it is not a satellite phone, the call is realized through the base station relay.

"So," Li Hong's eyes lit up: "If the other party is commanding from one place, even in Liancheng..."

"Just changed the calling card..."

"Yes!" Zhang Yunhu nodded: "In this way, the range will be greatly shortened!"

experience!

This is experience.

Whether it is Zhang Yunhu, Li Hong or Liu Qingshan, in terms of solving the case, although there is no system for Chen Yan.

However, look more and more knowledgeable.

What is the coverage area of ​​a base station?

800 meters by 800 meters!

Just that big.

Of course, the construction of base stations just to ensure calls does not need to be so intensive.

However, in addition to calls, the mobile phone also needs more bandwidth to download and transfer files.

Audio, video, live streaming, and more.

These are the important reasons for requiring dense base stations.

In this way, the final range of the suspects behind the scenes may be delineated in a geographic range of 800 meters by 800 meters!

Sometimes small tricks can solve big problems.

The related work was deployed immediately.

However, the work of base station signal inquiry is not over yet, and Zhao Bing is back.

Previously, when Zhang Ruiqing was arrested, Chen Yan arranged for Zhao Bing to compare the genes of Zhang Ruiqing's wife and son.

And it's done in secret.

"Team Chen, there is a major discovery!"