In the compound of the criminal investigation detachment, more than 100 people waited with bated breath under the scorching sun for the express dismantling in the duty room, and today can be said to be the darkest day in the history of the criminal investigation detachment of the Public Security Bureau of A.

The three targets of the close protection of the criminal police were killed silently, and the killing device was probably sent to the office building of the criminal investigation detachment by courier.

Everyone's hearts are depressed, like the lead cloud that has just hit, a little breathless, what if the other party mails not a strong magnetic field generating device, but a time bomb?

Time passed, Wang Tao was still dismantling the package, Qin Feifei was also pale at the moment, and the plump fathead fish was obviously frightened up and down: "Song Chuan, do you say this murderer is a little too scary?" ”

Terrible?

Song Chuan guessed that his hands and feet were already cold when he guessed the courier, and there was such a big security hole in the dignified criminal investigation detachment, and everyone was already sitting on an explosive bag when the courier entered the building, and they could be served by someone at any time.

But if you think about it, who would have thought that someone would kill someone by courier from someone inside the criminal investigation detachment?

There is a security device at the door of the criminal investigation detachment, but it is a security device that will only be used by outsiders, and the express delivery of internal personnel is directly sent in after the doorman signs for it, and it will not pass through the security inspection machine.

While the two were talking quietly, many people were also discussing quietly, waiting for the final result.

"Dingding...... Ding Ding ...... Dingding ......"

Suddenly, a light music sound came from the duty room, and the melody turned out to be a happy birthday song.

What is it?

When everyone outside was puzzled, Chen Jianbin and Wang Tao in the duty room had pale faces, especially Chen Jianbin whose eyes were bulging and his lips were trembling, obviously he was already angry.

Thirty minutes later.

The electronic device in the package had been placed in the middle of the conference table in Conference Room One, and everyone was silent, staring at the complex device, no one speaking.

Chen Jianbin still looked ugly, twisted his eyebrows and hugged his arms, and looked at Xia Dong with a deep breath of turbidity: "Xia Dong, you can talk about it first." ”

Xia Dong's face is also gloomy, Jun Xiu's eyebrows are full of sadness, and his outstanding figure is quite heroic under the constraints of the uniform but no one appreciates: "The technical room has conducted a detailed technical analysis of this device, which is an electronic generating device that generates a strong magnetic field through a high-intensity current, and there is no purchase channel on the market, it should be self-made from the traces of line welding, and a timed start device is installed, and the time is set at three o'clock in the morning on September 4." ”

Xia Dong picked up the device on the table and pointed to one of the lines: "There is a circuit trigger here, which is connected to the outer layer of the package, and once it is disassembled, it will trigger the electronic circuit to make a music box connected to it work, and the electronic sound we heard at the scene is emitted by this music box." ”

Xia Dong's introduction was very detailed, and the fact that the technical room was able to analyze the entire device in such a short time shows their ability.

But the problem is that according to the current technical analysis, the electronic components used in the device are very simple, are common components, and it is difficult to trace the source of the Tengfei Electric Building on Hongshan Road.

Chen Jianbin waited for Xia Dong to return to his seat and looked at Wang Tao, the express can enter the inside of the criminal investigation detachment, it is impossible to come in silently with wings, although the express package of the internal personnel of the criminal investigation detachment is only a security machine, but when the doorman signs for it, the courier will call to confirm in person, so when did the package arrive at the doorman, and which courier sent it, and whether the source can be found, this is what Chen Jianbin is most concerned about.

The problem is terrible, but solving it is the top priority.

Wang Tao began to report the results of the investigation just now: "Through the monitoring and inspection, it was determined that the courier was delivered to the company's doorman at 10:12 a.m. yesterday by the postman of Shentong Express Company, but the postman dialed the phone number on the courier in front of the doorman, and after confirmation, the doorman signed for the delivery, and then sent it to the duty room at 10:15. ”

After Wang Tao roughly introduced the situation, he turned on the projector, and it was the video of the time when the express delivery was handed over.

"This postman has been working for three years, and he delivers all the mail sent by Shentong Express to the detachment."

After Wang Tao finished speaking, he began to play the surveillance video at that time.

Under the high-definition video, the postman's every move is very clear, and everyone can clearly see the postman dialing the phone: "Hello Shentong Express, there is a package of you in the detachment guard, without your name on it......"

Wang Tao pressed the pause button: "The mobile phone used by the postman to dial the number is a special working mobile phone issued by the courier company, and it has an automatic recording function for all calls, and we have just extracted the recording of the other party's answer." ”

"My name is Zhang Lijun, I'm on a field job, you just ask the doorman to sign for it."

Zhang Lijun?

Everyone turned their attention to Zhang Lijun, who was sitting next to Sun Baoqiang, but they didn't expect that the other party was actually accepting the courier under the identity of Zhang Lijun.

Of course, everyone was just surprised that the other party knew Zhang Lijun's name, and they didn't doubt what he meant, because the detachment held an internal meeting yesterday morning, and Zhang Lijun was attending the meeting, and he didn't go out at all.

The sound is very distinctive, hoarse and ugly, like a leaky bellows, and occasionally like a tile rubbing against the metal to make people's eardrums burst.

After that, in the surveillance video, the doorman sent the device, which can kill Zhao Guangming silently, into the duty room.

Of course, Wang Tao's investigation did not end there, switching the projection, Wang Tao continued to report: "We investigated the phone number dialed by the courier, and the mobile phone number used to send anonymous text messages to Team Chen, it was a bearer card sold by Unicom many years ago, and there was no registrant information. ”

"And the signal base station to which the number was connected at that time ......"

Wang Tao paused, glanced at Chen Jianbin whose face was becoming more and more gloomy, and his voice was as heavy as a thousand catties: "Unicom 1203 base station!" ”

1203？

Base station 1203 again!

Everyone, including Song Chuan, had disbelief in their eyes.

How dare the other party?

He was in the vicinity of the criminal investigation detachment at that time, and it was only 800 meters away.

Wang Tao's face was as sauce as pig's liver, and within 800 meters of the criminal investigation detachment, he didn't say that he had dug three feet into the ground, but he had already checked more than once, but he didn't find anything.

But the facts tell him that he has appeared near the criminal investigation detachment more than once in 24 hours, which is no longer a provocation, but a humiliation!

Chen Jianbin began to arrange the next work with a gloomy face: "The level of cunning of the other party, I think everyone is already very clear, the other party is not only cunning, but also has done a very detailed investigation of the criminal investigation detachment, taking advantage of the defense loophole of the express package. ”

Chen Jianbin looked around and calmed down some excitement: "The next focus is on two aspects, the first is to continue to visit and investigate the surrounding area of the detachment, and the disposable mobile phone card used by the other party has been connected to the base station on the detachment building many times, indicating that the other party must be haunted nearby." ”

"The second is to investigate the entire mailing process of the anonymous package and find out who mailed it, and not a single detail can be missed!"