Su Tong carefully recalled the day Li Desheng's body was found, she did see that some evidence collectors picked up an object like a mobile phone and loaded it, how could it not be?

"Is there a list of reports?" Xu Sa believed in Li Hua's ability to do things, but that day he was also sure that Li Desheng's mobile phone had also been put into the evidence box in the hands of the evidence collector.

"Yes, I also have a copy in my phone." Li Huasheng was afraid that he had missed something, so he quickly took out his mobile phone to prove his innocence.

Xu Sa took the phone, Su Tong also poked his head out, and the two of them slid the phone screen in rows, looking up and down the two back and forth. Su Tong realized a certain seriousness, and his eyes became darker and darker when he looked at Xu Sa.

Su Tong is wrong alone, it is possible. But even with Xu Sa, I was wrong? The odds are a bit low.

Xu Sa knows what the meaning behind this incident is, the theft of evidence is a very serious problem, if this matter is reported, it is inevitable that he will be punished, and the worst thing is that there may be colleagues in their bureau or the second team who stole physical evidence.

"If you don't, you can't do it, you go to the telecommunications bureau to check, and you have to go through the same procedures and procedures, go ahead." Xu Sa calmed down the fluctuations in his heart, and only lightly ordered Li Hua to do it.

Finally, it was He Xingchen's turn to find the opportunity, and hurriedly said: "Didn't I try to hack into the elevator operation program yesterday and press the elevator to stop?" When I got back to the bureau and analyzed the data, I made a big discovery. ”

"What discovery?" Su Tong thumped the two legs that had been overloaded in the past two days. He Xingchen, this kid is usually like a muffled gourd, but whenever he does something, he is a blockbuster.

"There are two different source codes for the elevator's running program, one from the community control room and the other from a private computer," He Xingchen said excitedly about his new discovery.

"Speak human words." Xu Sa hurriedly interrupted He Xingchen's heart that wanted to talk about data codes.

"This means that someone can secretly control the elevator remotely on a personal computer, and can even intercept the signal of an emergency call, including blocking real-time monitoring." He Xingchen worked all night last night to separate the data of the two sets of source code.

At that time, he understood why he was so anxious in the monitoring room that he couldn't control the elevator, it turned out that there was such a shady scene behind it.

"Can you trace what kind of personal computer it is?" Xu Sa asked seriously.

"The detailed IP address is already being investigated, and the results will be available as soon as this afternoon." If He Xingchen hadn't received a notice from the second team that Li Desheng's house was on fire and Captain Xu Sa was trapped, he would probably have been able to get the results by now.

"Let's get back to the game. There's nothing worth looking at here, and we pretty much know what we need to know. Su Tong stood up and said happily.

"Uh-huh." A group of people left the scene in a big way.

Everyone returned to the conference room and held an emergency meeting, and the captain of the second team also brought their group to listen to the report.

"This is a communication record retrieved from a telecom operator, as well as a WeChat text message record, which clearly shows that Li Desheng and Li Aiyin received incoming calls from the same mobile phone number on the 15th, 16th, 17th, and 18th of last month for four consecutive days.

And this mobile phone number has been verified by real-name authentication, and it was sent by Chen Fa, the elevator maintenance officer. Li Hua pointed to the screenshot of the information on the big screen while explaining the content of the information to everyone.

Xu Sa nodded, and after motioning for him to sit down, Chen Hui took the folder and reported to everyone, "No abnormal objects were found in Li Desheng's three units, and after investigation and evidence collection, no genetic information was detected in the clothes hanging in the closet, but there were a lot of sweat stains left on those high heels, which were verified to belong to the deceased Li Aiyin."

The clothes are consistent with the surveillance footage we retrieved from the community last month, and they also belong to the deceased Li Aiyin. The key to the locked guest room in Li Desheng's home was found in a vanity box hidden in Li Aiyin's home, which proves that the two deceased had an immoral relationship. ”

Since the captain of the second team took over the report summary, he faintly felt like he had been struck by lightning. Sure enough, the forest was big, and there were all kinds of birds. Except for Xu Sa and Su Tong, the feelings were the same, and no one expected that the commonality of the two deceased turned out to be this.

Xu Sa and Su Tong's light breeze made everyone admire them even more. They don't know, Xu Sa and Su Tong are the first to find out, what thunder, they are already used to it.

"I called the maintenance company, and their technical department confirmed that the maintenance staff does have the authority to manage the elevator operation system during the maintenance of the elevator, and sometimes in order to better detect the use of the elevator, the people of their company will leave a back door in the operation program.

But once the elevator has passed the conformity test, they will force the cleaning of the back door that remains in the operating procedure. We later asked about the property management of the community, and the other party said that they were aware, and the contract signed by the two companies also clearly stated this. Zhou Li released the key sentences of the contract on the big screen.

"So, Chen is the biggest suspect?" The captain of the second team looked at Xu Sa, with admiration in his eyes, he really didn't find the wrong helper.

"From the point of view of the motive for the killing, the two deceased have complained about him, Li Aiyin is the initiator, Li Desheng, as a big owner, has more right to speak, and Li Desheng's follow-up complaint directly caused Chen Fa to lose his job." Su Tong looked at the notes he summarized in the notebook, and slowly said his profile.

"Besides, using the elevator to kill people, the person who can control the elevator the most is the most convenient, isn't it?" Su Tong's voice is not loud, but whenever she speaks, there is always a feeling of anticipation, even if she is talking about some jerky and obscure psychological profiles.

"I suggest that both of us issue wanted warrants at the same time, and it is important to catch Chen Fa in the shortest possible time." Xu Sa nodded vigorously on the counting table.

"I know, we'll definitely work together." The captain of the second team nodded hurriedly, the most onerous and dangerous investigation of the case had been handed over to Xu Sa and they had finished, if he didn't do something, it seemed a little too uninteresting.

"I heard that Officer Su also received threats from the murderer?" The captain of the second team asked with concern.

"Regarding that, our bureau has already checked, and the other party dialed up through the network virtually, and we can't find the source for the time being, but I think we should be able to ask clearly after we catch Chen Fa." Xu Sa's deep tone made everyone present feel restless.