It didn't take long for Zhao Ming and the technical team to arrive at the scene.

"Team Zeng, I'm sorry, I'm late. Zhao Ming scratched his head.

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

"I went to play live CS with my friends, and it's a little far away. Zhao Mingdao.

"Okay, life is quite colorful. Zeng Ping said with a smile.

"I want to practice my gunfight experience so that I can use it to catch criminals in the future. Zhao Mingdao.

Zeng Ping didn't hold on to this stubble, found Lu Wen of the technical team, and asked him to go to the toilet to collect the fingerprints of the camera.

"Do you have any boyfriend items at home?" Han Bin said.

"There was his water glass under the table. As she spoke, Chen Luyan was about to reach out and take it.

"Don't move, let me come. Han Bin wore gloves and took out the water cup 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 visible fingerprints. Zeng Ping said.

After a while, Lu Wen and another colleague of the technical team collected fingerprints and used a portable police fingerprint comparison machine to compare fingerprints 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 fingerprints on the camera and the fingerprints on the cup, are not the same person. Lu Wendao.

Zeng Ping responded, handed the envelope and USB flash drive to Lu Wen, there are some inconspicuous fingerprints, which cannot be seen by the naked eye, but it does not mean that there are none, and they can be detected by chemicals and instruments.

Of course, if you wear gloves or have been wiped, you really won't leave fingerprints.

"Comrade policeman, can my boyfriend rule out suspicion. Chen Luyan breathed a sigh of relief.

If this was really his boyfriend's doing, she would feel even more terrible.

Zeng Ping did not answer, although the fingerprints did not match, but the suspicion of an accomplice could not be ruled out, and his boyfriend had the keys to the house and was still suspicious.

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

"Did you find anything?"

"I went to the monitoring room and asked, and there was surveillance at the front door, in the lobby on the first floor and in the elevator, but there was no monitoring in the staircase, back door and corridor of the apartment building. Li Hui said.

In other words, as long as the suspect understands the situation of the apartment, or steps on the spot in advance, it is completely possible to avoid surveillance. Tian Li said.

"Apartment buildings are different from residential buildings, usually only one or two, and the security is a little bit worse. Han Bin said.

"From the existing surveillance, have you found any personnel?" Zeng Ping said.

"Nope. ”

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

Zeng Ping nodded, "In this case, it is more likely that an acquaintance will commit the crime." ”

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

Subsequently, Chen Luyan used the computer to watch the monitoring on the side.

Han Bin and the others were a little farther away, discussing the case in a whisper.

"Team Zeng, the loopholes in the monitoring are too big, and the suspects with a little brain will climb the stairs, and it is unlikely that the monitoring will be investigated. Li Hui said.

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

"Aren't fingerprints incomparable?" Zhao Ming said.

"Before that camera was installed, someone else might have touched it, and it might even be the fingerprint of the person who sold the camera. Tian Li said.

"If that's the case, it's complicated. Li Hui said.

"Han Bin, tell me what you think. ”

"I just looked at the camera, and I think I can use the camera as a direction to investigate. Han Bin said.

"What kind of investigation?" Li Hui said.

"Now that the camera has been placed, it must be watched, and the video in the camera is either copied or uploaded through the Internet, so that it can reach the suspect. Han Bin said.

"That's a good starting point. Zeng Ping analyzed:

"If it is a copy, it needs to be replaced frequently, and the suspect may have come to the victim's house more than once, and if it is uploaded over the Internet, the camera must be connected to a wireless network. ”

"I just saw that the camera should be a video uploaded through the Internet, and the suspect can be monitored with a mobile phone or computer. Han Bin said.

"The camera is so hidden, surrounded by walls, and the network signal that is too far away cannot be reached at all, which means that the suspect is using the surrounding network. Li Hui said.

Han Bin took out his mobile phone, he just took a few photos of the camera, looked at it carefully, and said: "342"

"What do you mean?"

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

"Are you talking about 342?" Chen Luyan on the side interjected.

"Do you know whose wireless network this is nearby?"

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

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

"Just me and my boyfriend. Chen Luyan said.

"Is the network also your boyfriend helping to install it?" Han Bin said.

"No, the landlord had already installed it when I came. Chen Luyan said this, as if she remembered something: "By the way, the password was also set by the landlord, and he also knew it." ”

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

"But the landlord didn't have the keys either. Tian Li said.

"It's a bit preconceived, the landlord doesn't have the key now, but he used to, and Miss Chen may have installed a camera before she moved in. Han Bin said.

"That's right. Tian Li suddenly realized: "Then you should use the fingerprints collected on the camera to compare them with the landlord's fingerprints." ”

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

"The router is placed on the desk, and when I open the window, it gets dusty, which I wipe a lot. Chen Luyan said.

"Routers are generally installed with the help of people from network companies, and the fingerprints collected may not be my own. Han Bin said.

"Think about it, if there is anything from the landlord in the house, or has left his fingerprints. Tian Li said.

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

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

"I remember, when I signed the contract, I didn't want to press it, and the landlord proposed to let both parties have their fingerprints taken, and he said it would be safer and more reassuring. Chen Luyan said.

"Take the contract. ”

After a while, Chen Luyan brought the lease contract, and the fingerprints were stained with ink, so they didn't need to be collected, just compare them directly.

After some comparison, Lu Wen confirmed: "The handprint on the lease contract is completely consistent with the half-section of the fingerprint collected on the camera, and this person is very suspicious." ”

Because only half of the fingerprints were collected on the camera, Lu Wen could not be 100% sure that it was the same person's fingerprints.

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

In one case, the likelihood of two people having the same fingerprint in half is almost negligible.