That night, Wu Ming and Song Hui observed in front of the isolation net between the living area and the production area, and found that if the suspect threw the mobile phone into the production area in advance, and then waited for an opportunity to hide somewhere in it, it was unlikely that he would be able to spy on the relatively regular electromagnetic shielding maintenance gap and contact with the outside world.

This is because there is a concrete road on both sides of the fence that is 10 meters wide, and there are cameras every 100 meters. I think this should be the first time that the isolation network was established to take into account the possibility that someone will take advantage of this ghost, so it is obviously impossible to get the mobile phone in advance without knowing it.

So, how exactly did the suspect bring a cellphone-like communication tool into the production area?

Moreover, judging from the content of the TV series in that recording, the suspect should have made all the preparations that night, which means that he was confident before acting.

"Chief, why did the suspect create the illusion that he was watching TV?"

"Huh?" Wu Ming really didn't think of this. Turning his head to look at Song Hui and pondering for a while, he said: "It may not be that I want to create the illusion that I am watching TV, but just want to confuse the public, so as to avoid the interception of the content of the call, and in case it is intercepted, the content of the call will be exposed." ”

"It stands to reason that the recording can be processed by technical means so that the content of the suspect's speech can be heard. ”

"Yes, they're dealing with it. ”

"When will it be dealt with?"

"I'm waiting, too. ”

For Song Hui, if the suspect's voice can be heard clearly, it will be much easier to collect and identify the suspect's voice. Unlike now, you can only hear a few words, which is very difficult to distinguish, not to mention, and it is impossible to accurately judge the relevant appearance and age of the suspect based on the voice.

Since it is now the New Year's Day, although the whole factory has been under martial law, the employees are still given three days off, but all the employees can only take a vacation in the living area.

Wu Ming also gave Song Hui a day, but Song Hui had a large number of collected sounds on hand to identify, and he didn't have time to rest at all.

On the second day, Song Hui came to the office early and continued to bury herself in her work.

Unconsciously, it was already eleven o'clock at noon, but Wu Ming suddenly pushed the door and walked in.

"Come on, listen to it, this is the recording they just received. ”

"Chief...... Can this phone communicate with the outside world?"

At a glance, I saw that what Wu Ming handed over was not his elderly machine, but a mobile phone that he had never seen before, which was smaller than ordinary mobile phones. Song Hui took it, and his eyes couldn't help but show a look of expectation.

"yes. Wu Ming, who understood Song Hui's careful thoughts, smiled faintly and said, "Work hard, don't think twice." ”

Hearing that Wu Ming didn't mean to let himself use his mobile phone at all, Song Hui subconsciously stuck out his tongue and immediately put on headphones and listened carefully.

"No, now that the whole factory is under martial law, it can't be sent out at all...... Not even in the morning...... It's more watched there than anywhere else. …… Yes, except for the living quarters and the production workshop, there is no way to go. ”

"Chief, why can't you hear what the person you're talking to is saying?"

According to their explanation, the interlocutor may have used a technique that allows the signal to jump, so the other party's speech was not intercepted. ”

With a relatively clear phone recording, Song Hui also has enough basis for analysis. Although the suspect deliberately lowered his voice in the recording, it could still be heard that the other party did not deliberately change his voice.

Therefore, Song Hui quickly came to this analytical conclusion:

First, the suspect was male, aged between 40 and 45.

Second, the suspect's face was relatively thin, with significantly sunken cheeks, a pointed chin and a slightly wider forehead.

Thirdly, the suspect's voice sounded subtle, and it should have been a missing front tooth, or simply broken, and was in the process of filling or prosthesis.

Fourth, the suspect's upper body is somewhat rickety, and his shoulders are slightly shrugged forward, causing his vocal cords to be compressed for a long time, so his voice appears sharp and hoarse.

"Sharp and hoarse?" Faced with these four seemingly contradictory words, Wu Ming inevitably had some doubts.

"That's it. Song Hui hurriedly shrugged his shoulders and learned a few words before Wu Ming understood.

"If your inference isn't too far off, you don't have to bother looking for this person. ”

"Why, the chief has seen this man?"

It was Zheng Qingqing, who was on duty at the same time as Qian Jun that day, but when he was supervising the three workers who were responsible for sealing the paint barrels, he went to the toilet with a stomachache. ”

Although Wu Ming had not met the people who had been isolated, he was already familiar with their identity information and physical characteristics in the information provided by Lin Jia and the video materials provided by the factory.

And Zheng Qingqing's appearance is similar to Song Hui's analysis - emaciated, sunken cheeks, shrugged shoulders, and rickets on the back. Moreover, according to Zheng Qingqing's archives, he suffered from asthma when he was a child, and it took many years of treatment to alleviate it. Eventually, his appearance also changed.

However, if the suspect who contacted the outside world was really Zheng Qingqing, he did not have any chance of contacting the invisible paint at all. That is, he should have one more accomplice. It was the same accomplice who stole five grams of stealth paint and secretly manipulated the paint bucket.

Who could this person be?

According to the strict management system of the paint production workshop, it is speculated that the person should have access to the paint barrel, and it must have been someone in the short period of less than 30 minutes after the paint barrel was taken out of the warehouse and strictly weighed in the production workshop, and before it was filled with paint and sealed.

In this way, the scope is locked on the three people who were on duty that night and were responsible for sealing the paint barrel.

Other than that, no one has access to the empty paint buckets that are picked up from the warehouse and brought to the production floor.

Still not right. According to the time of the intercepted phone call and the time shown in the TV series content played therein, the call took place the morning after the paint was stolen. At this time, Zheng Qingqing and others had already been isolated, how could he make a call at 9:40 with the help of the time when the electromagnetic shielding station was shut down for maintenance?

Also, from this phone recording, it is known that the stolen five grams of invisible paint should be in the hands of the caller. Otherwise, there would not be any martial law in the whole factory, and it would not be possible to send it out at all.

What went wrong?

"Is the Chief doubting my reasoning?"

Seeing that Wu Ming had not spoken for a long time with his analysis conclusion, Song Hui asked a little nervously. For some reason, she always felt more nervous in front of Wu Ming than in front of Lin Jia.

"It's not. You have never met Zheng Qingqing, but you can analyze the appearance of the caller so clearly, and you are very close to Zheng Qingqing, this alone shows that your inference is correct. It's just that if that person is Zheng Qingqing, there is another problem that is difficult to explain. ”

(End of chapter)