Detective from The Future

Not long after, Zhao Ming and the technical team rushed to the scene.

"Team Zeng is sorry, it's late." Zhao Ming scratched his head.

"Why did you kid go? It took so long to come here."

"Going to play live CS with friends, it's a bit far away." Zhao Ming said.

"Okay, life is quite colorful." Zeng Ping smiled.

"I want to practice gunfighting experience, which will be useful for arresting criminals in the future." Zhao Ming said.

Zeng Ping didn't hold on to this crop either. He found Ruben from the technical team and asked him to go to the toilet to collect fingerprints from the camera.

"Do you have any boyfriend's belongings in your house?" Han Bin said.

"There is his water glass under the table." Chen Luyan was about to reach for it.

"Don't move, let me come." Han Bin put on his gloves and took out the water glass from under the table.

"There are fingerprints." Han Bin handed the water cup to the rest of the technical team to collect fingerprints.

"Team Zeng, are there fingerprints on the envelope and USB flash drive?"

"There are no obvious fingerprints." Zeng Ping said.

After a while, Lu Wen and another colleague from the technical team collected fingerprints and used a portable police fingerprint matching machine to perform fingerprint comparisons on the spot.

In this way, the direction of investigation can be determined as soon as possible and the time to solve the case can be shortened.

"Team Zeng, the fingerprint on the camera and the fingerprint on the cup are not the same person." Lu Wen said.

Zeng Ping responded and handed the envelope and USB flash drive to Lu Wen. There were some unobvious fingerprints that were invisible to the naked eye, but it didn't mean that they didn't. They could be detected by chemicals and instruments.

Of course, if you wear gloves or have been wiped, you will not leave fingerprints.

"Comrade police, can my boyfriend be ruled out." Chen Luyan breathed a sigh of relief.

If this thing was really done by his boyfriend, she would feel even more terrible.

Zeng Ping did not answer. Although the fingerprints did not match, the suspicion of his accomplices could not be ruled out. His boyfriend had the keys to the house and was still suspected.

"Team Zeng." At this moment, Li Hui who was checking the surveillance came back.

"Have you found it?"

"I went to the monitoring room and asked. The front door, the lobby on the first floor, and the elevator are monitored, but the stairs, back doors and corridors of the apartment building are not monitored." Li Hui said.

"In other words, as long as the suspect understands the situation of the apartment, or step on the spot in advance, he can completely avoid surveillance." Tian Li said.

"The apartment building is different from the residential building. Generally there are only one or two buildings, and the security is a bit worse." Han Bin said.

"From the existing monitoring, is there anyone who can be found?" Zeng Ping said.

"No."

"I think Ms. Chen should be shown to see if there is anyone she is familiar with." Han Bin said.

Zeng Ping nodded, "In this case, acquaintances are more likely to commit crimes."

"I copied all the videos." Li Hui said.

Afterwards, Chen Luyan used the computer to watch the surveillance.

Han Bin and others were at a distance, discussing the case in a low voice.

"Team Zeng, the loopholes in the monitoring are too big. Suspects with a little brain will climb the stairs. The possibility of investigation and monitoring is unlikely." Li Hui said.

"I think, but her boyfriend is still suspicious, the door lock has no traces of being picked, there is no key to enter the door, and there is no way to install a camera." Tian Li said.

"Isn't the fingerprints incomparable?" Zhao Ming said.

"Before the camera was installed, it might have been touched by someone else, or even the fingerprint of the person selling the camera." Tian Li said.

"If this is the case, the case will be complicated." Li Hui said.

"Han Bin, tell me your opinion."

"I saw that camera just now, and I think the camera can be used as the direction of investigation." Han Bin said.

"How to investigate?" Li Hui said.

"Since the camera is put on, it must be watched. The video in the camera is either copied or uploaded via the Internet so that it can reach the suspect." Han Bin said.

"This entry point is good." Zeng Ping analyzed:

"If it is a copy, the U disk needs to be replaced frequently, and the suspect may have visited the victim's home more than once; if it is a network upload, the camera must be connected to the wireless network."

"I just saw that the camera should be a video uploaded through the Internet. The suspect can monitor it with a cell phone or computer." Han Bin said.

"The camera is so secretive, surrounded by walls, and network signals that are too far away can't be beaten. In other words, the suspect used the surrounding network." Li Hui said.

Han Bin took out his mobile phone. He just took a few photos from the camera, observed carefully, and said, "342"

"What do you mean?"

"The network account used by the camera." Han Bin said.

"Are you talking about 342?" Chen Luyan interrupted.

"Do you know that this is the wireless network of someone nearby?"

"This is my home, and the network I connect to is 342." Chen Luyan said.

"Who knows your home network password?" Li Hui asked.

"Just me and my boyfriend." Chen Luyan said.

"The network is also your boyfriend, did you help install it?" Han Bin said.

"This is not the case. When I came, the landlord had already installed it." Chen Luyan said this, as if remembering something: "By the way, the landlord has set the password, and he knows it too."

"In this way, in addition to Miss Chen's boyfriend, the landlord is also suspect." Zeng Ping said.

"But the landlord doesn't have the key either." Tian Li said.

"This is a bit preconceived. The landlord does not have the key now, but he used to have it. Before Miss Chen moved in, she might have installed a camera." Han Bin said.

"That's right." Tian Li suddenly realized: "The fingerprints collected on the camera should be used to compare with the landlord's fingerprints."

"Miss Chen, have you wiped the router?" Zeng Ping said.

"The router is on the desk, and it gets dusty when the window is opened. I often wipe this." Chen Luyan said.

"Routers are usually installed by people from network companies, and the fingerprints collected may not be my own." Han Bin said.

"Think about it, is there anything from the landlord at home, or his fingerprints." Tian Li said.

Chen Luyan frowned for a moment and shook her head and said, "The house has been rented for two months. After I rented it, I have cleaned it up, and I can't remember it for a while."

"When you signed the house lease contract, did you press your fingerprints?" Han Bin said.

"I remembered that when I signed the contract, I originally didn't want to press it. The landlord proposed to let both parties press their fingerprints. He said it was safer and more assured." Chen Luyan said.

"Take the contract."

After a while, Chen Luyan brought the lease contract, and the fingerprints were stained with ink pad, so there was no need to collect them, just compare them directly.

After some comparisons, Lu Wen confirmed: "The fingerprint on the lease contract is exactly the same as the half of the fingerprint collected on the camera. This person is very suspicious."

Because only half of the fingerprint was collected on the camera, Ruben could not be 100% sure that it was the fingerprint of the same person.

However, this is enough for Zeng Ping and Han Bin.

In one case, the possibility that half of the fingerprints of two people are the same is almost negligible.