Fu Liangtao sat in the conference room, studying the facts of another case referred by ME from Sha Tin with a little leisure.

To be precise, Fu Liangtao was actually waiting for Luo Mengning and Qin Xiangwen to arrive and join the discussion of case analysis. However, in Fu Liangtao's heart, the two cases of Zhou Muqing and Li Bingde are not far from being closed, and there is no need to think about it anymore.

While studying the case, Fu Liangtao also observed Pang Jitong distractedly. Since the morning, Fu Liangtao has already felt that Pang Jitong seems to have lost his former vitality.

Not long after, Luo Mengning and Qin Xiangwen came together. The two seemed to be already engaged in an unknown discussion on their way to the conference room, and the results of the discussion were less than satisfactory, as the two of them looked slightly serious.

Fu Liangtao paid attention to Pang Jitong out of the corner of his eyes, and saw that Pang Jitong was unmoved, still sitting calmly studying the case.

Before he could think about it, Luo Mengning had just put down the things in his hand, and before he could sit down, he couldn't wait to ask Fu Liangtao and said, "Ah Tao, I said...... Will the cases of Li Bingde and Zhou Muqing have nothing to do with Xu Jingjia?"

As soon as these words came out, Fu Liangtao's expression was straight, and he and Pang Ji looked at Luo Mengning fiercely. Fu Liangtao reacted immediately and asked in a deep voice, "Is there a problem with the results of electronic forensics analysis?" Or is it not what we expected?" Fu Liangtao's gaze slowly wandered between the faces of Luo Mengning and Qin Xiangwen, trying to confirm through their expressions.

Luo Mengning and Qin Xiangwen each distributed their completed analysis reports to Fu Liangtao and Pang Jitong. At the same time, Luo Mengning explained: "This is the analysis report we have just completed."

Fu Liangtao almost snatched the report from Luo Mengning and Qin Xiangwen, and then quickly skimmed through the two reports. While flipping through the report, Xu Jingjia's calm face swept through Fu Liangtao's mind the night before.

At this moment, in Fu Liangtao's heart, Xu Jingjia's composure at that time was inevitably confident.

Luo Mengning said, "You also know that we can't find any evidence related to the case in the billing records of the network provider. Therefore, when conducting electronic data forensics, Man and I paid special attention to whether there was any trace of proxy server use in the electronic devices."

Using a proxy server is similar to using a vest. In the process of using the network, the network service provider will record the IP address of the user and the server providing network services to the user, and the IP address of the user and the host of the server will also record the IP address of the other party to identify the location of the other party.

When using network services through a proxy server, the proxy server exists as an intermediary and the user is like using a vest. Both the user and the server providing the network service will only record the IP address of the proxy server, i.e. the user's vest.

This is a common tactic used by attackers to make the investigation more difficult. For Fu Liangtao, this is nothing new.

It was precisely because of this possibility that Fu Liangtao made the decision to apply for a search warrant even though Xu Jingjia's network service bill records were not suspicious. Unexpectedly, as soon as the results of this analysis came out, Fu Liangtao was unexpected.

Fu Liangtao then sat up straight, lowered his head and studied the analysis report repeatedly, and was silent. After a while, Fu Liangtao then asked, "What about the Trojan horse program? Talking about the part about the Trojan ......", he skillfully flipped the report to the relevant position. Since there was no trace of the Xu family's electronic devices using proxy servers, Fu Liangtao actually didn't have much expectation for Luo Mengning's answer.

Luo Mengning immediately responded: "In the mobile phones and computers found in Xu Jingjia's home, there is no server and server editor of the Trojan horse program 'Seven Points'."

As a result, the evidence they have now is too weak.

Luo Mengning thought for a moment, and then added: "From the habits of using electronic devices, it can be inferred that the computer near the window is shared by their family, and the one placed in the opposite corner is Xu Jingjia's personal computer. The network activity records of the computers are consistent with those shown on the bills, which confirms that the bill records can truly reflect the Hui family's network footprint."

After hearing this, Pang Jitong on the side asked, "Sir Tao, if none of the electronic devices in the Xu family are found, could it be that Xu Jingjia has hidden other electronic devices?"

Fu Liangtao glanced at Pang Jitong, and only felt that in the past, the object of Pang Jitong's confusion would inevitably be Luo Mengning, not him. Thinking of this, Fu Liangtao's gaze inadvertently fell on Luo Mengning's face, wondering if something had happened between the two after he had finished collecting evidence and left the scene.

However, now is not the time to dwell on these locks.

Fu Liangtao still focused on the topic of their discussion, and said, "Perhaps, let's listen to Xu Jingjia's online activity analysis first." After saying that, he lowered his eyes and continued to read the analysis report of Luo Mengning and Qin Xiangwen.

So, Luo Mengning continued: "In the electronic device used by Xu Jingjia, except for what he did and Fang Tu, no other social media accounts were found.

Ms. Hui has a small list of contacts on her phone, and her account is only used to communicate with her family and a high school classmate in the United States. Among them, Xu Jingjia and this classmate mostly use voice messages as messages, and many times only communicate once in ten days and a half months.

Xu Jingjia's Fangtu account is also set to be private, although her account tracks some accounts related to interests and news, but she does not accept anyone's tracking and does not follow any friends. To put it simply, only Xu Jingjia can see the information posted by others, but other people can't see what she posted."

This point is consistent with the information obtained by Fu Liangtao when he questioned Xu Jingjia when he was collecting evidence that day. When asked about Hui's social media habits, Hui Jingjia confessed that she had shut down all social media accounts with friends since 2017.

In Fu Liangtao's view, this is naturally not an ordinary decision. In this way, combined with Xu Jingjia's life model, she is self-enclosed in the true sense. Except for the friend who was abroad, Xu Jingjia had close to zero communication with the outside world.

In such a technologically advanced generation, what level of determination does it take to do it?