With the cooperation of the mobile company, Tan Tan has always kept track of the mobile phone number signal that the screen name "Caiyunfei" used to log in to the network, but now it has been within a kilometer of the four-dimensional research institute, and it seems to be circling in circles.

Soon, Tan Tan said to Lin Jia: "Forest Bureau, the mobile phone signal has stopped." ”

"Location?"

"The Fukuzawa Garden community opposite the institute."

When Lin Jia immediately told Zhao Zengyuan this important information, he received a report from Zhao Zengyuan in less than ten minutes: "Forest Bureau, I found that mobile phone." ”

"What's the situation?"

"Tucked under the trunk in the back seat of a delivery motorcycle. According to the delivery boy, it wasn't his mobile phone, and he didn't know when it was stuffed there. ”

"Immediately find out the trajectory of the takeaway brother in the previous hour. Especially where he once stayed. ”

"Yes."

Although the mobile phone signal appeared more than forty minutes ago, Lin Jia considered that the person who deliberately stuffed the mobile phone secretly into the takeaway brother's motorcycle might set it to turn on at a timer, so he appropriately relaxed the time to an hour.

Soon, Zhao Zengyuan's call came in.

According to the delivery boy, before coming to Fuze Garden, he went to Ruijingyuan, which is located behind the Siwei Research Institute, to deliver an order. Because the address left by the takeaway was not very clear, and the other party had not answered the phone at that time, so I turned around several times in the Ruijingyuan community.

Now we have come to the downstairs of the unit where the delivery guy was storing the motorcycles after the phone was called. However, there is no surveillance video in front of this building, so it is necessary to call up the surrounding video to confirm whether there are any suspicious people in the vicinity of the motorcycle parking location at that time. ”

"Okay, be fast." Zhao Zengyuan's reaction to the situation of the food delivery brother just happened to be able to explain why Tan Tan's surveillance found that the mobile phone signal seemed to have been circling in circles. So Lin Jia immediately ordered Zhao Zengyuan: "Let Xiao Cui take people to the property of the community to watch the video immediately." And make a copy, and send someone back to the bureau immediately along with the mobile phone. ”

"Yes."

"You and Wei Chen keep in touch with Tan Tan at all times, and continue to look for the source of the signal to listen to Dr. Zhong's mobile phone."

"Understood."

Because Zhong Caini moved back to the research institute after the New Year's Day holiday, and plunged into the laboratory. She was used to turning off the phone at night, but because she was thinking about Wu Ming in her heart, she left her mobile phone in the dormitory.

However, although Tan Tan was able to detect the exact location of Zhong Caini's mobile phone, he could not determine the location of the signal source that monitored Zhong Caini's mobile phone.

Therefore, Zhao Zengyuan and Wei Chen must get Zhong Caini's cooperation, that is to say, only when Zhong Caini's mobile phone is in a state of call, and the monitoring signal is instantly strengthened, can Tan Tan capture the approximate location.

It was only through layers of instructions that she was finally able to agree through the security department of the Four-Dimensional Research Institute, and the security guard on duty called Zhong Caini out of the laboratory, and after explaining the situation, Zhong Caini returned to the dormitory and made a call to Zhao Zengyuan's mobile phone with her mobile phone.

As a result, Lin Jia had no choice but to order Zhao Zengyuan to temporarily give up his plan to continue to find the source of the surveillance signal. Ordered them to rush to the property of the community, assist Cui Luyi in watching the video, and go all out to find the suspicious person who stuffed the mobile phone used by "Cai Yunfei" into the back seat of the delivery brother's motorcycle.

At the same time, Lin Jia also led Tan Tan to watch the surveillance video of Ruijingyuan that was sent back, as well as to check the mobile phone that was sent back together.

There is no doubt that this abandoned mobile phone and the signal that was suddenly interrupted to monitor Zhong Caini's mobile phone are enough to show that Lin Jia's initial judgment was correct. That is, someone deliberately attracted the attention of the police, so as to create an opportunity for Lu Xidong, who had not shown up at home all day, to escape.

Moreover, this also illustrates another problem. The people who were hiding behind the scenes and cooperating with Lu Xidong were very clear about the police's actions tonight.

Are there people hidden within the police that the city bureau and the NSA do not know?

Lin Jia thought about it, although he couldn't rule out this possibility, he always thought that it was not very likely. After all, tonight's action arrangement was not planned for a long time, but almost Lin Jia did not come up with it until this afternoon. In particular, very few people know about this operation. The city bureau even notified Ling Zhan to bring reinforcements because of the serious shortage of manpower after listening to Zhong Caini's mobile phone and the mobile phone signal used by "Cai Yunfei" appeared at the same time.

In other words, if someone leaks the information in advance, it can only be an insider of the NSA. This is even more unlikely. After all, including Wei Chen and Cui Luyi, the others were only notified after Lu Xidong did not go to the Four-Dimensional Research Institute on time to take over the shift. And those who knew that Lin Jia made the decision to prevent Lu Xidong from jumping off the wall in a hurry were only Zhao Zengyuan and Song Jin. For the two of them, Lin Jia is 100% sure in his heart.

If someone hadn't leaked the news in advance, how would they have noticed that the police were going to take action against Lu Xidong tonight?

Could it be that Lu Xidong, or his accomplices, have been secretly observing the movements of the National Security Bureau?

Or have they discovered the whereabouts of Song Jin, who has been monitoring Lu Xidong all along?

Thinking of this, Lin Jia put the extremely ordinary mobile phone in his hand and found nothing after repeated inspections on the table, and leaned back on the chair with both hands on his chest.

Lin Jia believes in Song Jin's prudence and work attitude. Therefore, it is absolutely impossible for Song Jin to expose that he has been monitoring Lu Xidong's whereabouts because of his careless actions. Then there is only one possibility, the person who leaked Song Jin's whereabouts must be someone from within the Four-Dimensional Research Institute, who knows Song Jin, and knows the specific task that Song Jin is performing.

Director Long Zhunxiong, Deputy Director Wang Ding, and Director of the Security Department Gu Jun, in addition to that...... Does Deputy Chief Engineer Luo Shiqiang know?

It stands to reason that he should not know, but it is difficult for Lin Jia to make a very positive judgment. After all, Song Jin has been in and out of the Four-Dimensional Research Institute many times, and there should be many people who know her. If you have the heart, it is not impossible for Luo Shiqiang, who is in charge of logistics, to get some relevant information from the security department or from the deputy director Wang Ding.

In order not to be guided by this preconceived consciousness, Lin Jia simply stood up and returned to the technical investigation department where Tan Tan was located.

"Forest Bureau, look."

"What, did you find something?"

"This is a person I found in the video surveillance of the Ruijingyuan community." Tan Tan pointed to a video edited by her and said: "When this person entered the community from the south gate of Ruijingyuan, he was wearing a down jacket and a mask, glasses and hat. However, when he left through the East Gate 21 minutes later, he had already taken off his mask and glasses. ”

"The color of the down jacket is not the same, why do you judge that they are the same person?"

"This down jacket is available in both men's and women's styles, and I noticed it when I was visiting the mall the other day, and it can be worn on both sides. And the color is different inside and out. Tan Tan stretched out his hand and pointed to the shoes of the man in the video and said: "The Forest Bureau carefully observed his shoes, from six o'clock in the afternoon to the time after the delivery brother left, all the people who walked in and out of the Ruijingyuan community only had one pair of shoes of this style."

What's more, this seems to be a suspicious figure of two people, who are extremely similar in height and size, including gait. ”

(End of chapter)