Not long after, Zhao Ming and the forensics team arrived at the scene.
"Captain Zeng, I'm sorry I'm late." Zhao Ming scratched his head.
"Where did you go? Why did you take so long to come here? "
"I went to play Counter-Strike with my friends. The venue is a bit far from the city."
"Not bad. Your life is quite interesting." Zeng Ping laughed.
"I wanted to practice my gunfight experience. It will be useful in arresting criminals in the future," Zhao Ming said.
Zeng Ping did not harp on this topic. He found Reuven and asked him to go to the toilet to collect the fingerprints from the camera.
"Do you have any of your boyfriend's belongings in your house?"
"His cup is under the table," Chen Luyan said as she reached out to grab it.
"Don't move. Let me do it." Han Bin put on his gloves and took out the cup from under the table.
"There are fingerprints." Han Bin passed the cup to the forensics team to collect the fingerprints.
"Captain Zeng, are there any fingerprints on the envelope and the USB drive?"
"No obvious fingerprints."
After a while, Reuven and another colleague from the forensics team collected the fingerprints and used the portable fingerprint comparator to compare the fingerprints on the scene.
This way, they could quickly determine the direction of the investigation and shorten the time needed to solve the case.
"Captain Zeng, the fingerprints on the camera and the cup are not the same person."
Zeng Ping nodded and passed the envelope and the USB drive to Reuven. Some fingerprints were not obvious and could not be seen by the naked eye, but it did not mean that they did not exist. They could be detected by chemicals and equipment.
Of course, if the person was wearing gloves or had been wiped, then the fingerprints would not be left.
"Officer, does that mean my boyfriend is not a suspect?" Chen Luyan heaved a sigh of relief.
If this was really done by her boyfriend, she would feel even more terrified.
Zeng Ping did not answer. Although the fingerprints did not match, they could not rule out the possibility of accomplices. Her boyfriend had the house key, so he was still a suspect.
"Captain Zeng."
At this moment, Li Hui came back from checking the surveillance.
"Have you found anything?"
"I went to the surveillance room to ask. The front door, the lobby on the first floor, and the elevator are monitored, but the stairs, back door, and corridor of the apartment building are not monitored," Li Hui said.
"In other words, as long as the suspect understands the situation in the apartment, or is aware of the situation in advance, he can completely avoid the surveillance cameras," Tian Li analyzed.
"Apartment buildings are different from residential buildings. There are usually only one or two buildings, and the security is not as good," Han Bin said.
"From the existing surveillance footage, have you found any suspects?" Zeng Ping asked.
"No."
"I think we should let Miss Chen take a look at the surveillance footage to see if there is anyone she knows," Han Bin suggested.
Zeng Ping nodded. "This case is more likely to be committed by an acquaintance."
"I've copied all the videos." Li Hui took out a thumb drive.
Then, Chen Luyan used the computer to watch the surveillance.
Han Bin and the others were a little further away, discussing the case in low voices.
"Captain Zeng, there are too many loopholes in the surveillance footage. Any suspect with a bit of brain will climb the stairs. The possibility of checking the surveillance footage is not high," Li Hui said.
"I think so, but her boyfriend is still a suspect. There are no traces of the door being picked. Without the key to enter the door, there is no way to install the camera," Tian Li said.
"Isn't the fingerprint better?" Zhao Ming said.
"Before the camera was installed, it might have been touched by someone else. It might even be the fingerprint of the person who sold the camera," Tian Li explained.
"If that's the case, the case will be complicated," Li Hui said.
"Han Bin, tell me your opinion."
"I've seen the camera just now. I think we can use it as a direction for investigation."
"What kind of screening method?"
"Since there is a camera, we must look at it. The video in the camera is either copied or uploaded through the internet. Only then can it reach the suspect," Han Bin said.
"This is a good point of entry." Zeng Ping nodded and analyzed.
"If it's a copy, the USB drive needs to be changed frequently. The suspect may have come to the victim's house more than once. If it's uploaded through the internet, the camera must be connected to a wireless network."
"I've seen it just now. The video from the camera should be uploaded through the internet. The suspect can use a mobile phone or computer to monitor it," Han Bin said.
"The camera is hidden so well. There are walls around it. The network signal that is too far away can't reach it at all. In other words, the suspect used the surrounding network," Li Hui said.
Han Bin took out his phone. He took a few pictures of the camera and carefully observed it. "342."
"What do you mean?"
"The network account used by the camera."
"Are you guys talking about 342?" Chen Luyan interrupted.
"Do you know whose house's wireless network is this?"
Chen Luyan's jaw dropped. "This is my home. The network I linked to is 342."
"Who knows your home network password?" Li Hui asked.
"Only my boyfriend and I."
"Did your boyfriend help to install the network?"
"No. When I came, the landlord had already installed it." Chen Luyan seemed to have thought of something. "Oh, the password was also set by the landlord. He knows it too."
"It seems that besides Miss Chen's boyfriend, the landlord is also a suspect," Zeng Ping said.
"But the landlord doesn't have the key," Tian Li said.
"That's a bit preconceived. The landlord doesn't have the key now, but he used to. Before Miss Chen moved in, he might have installed the camera," Han Bin said.
"Yes." Tian Li suddenly understood. "Then we should compare the fingerprint collected from the camera with the landlord's fingerprint."
Zeng Ping walked over and checked. "Miss Chen, have you cleaned the router?"
"The router is on the desk. When I open the window, it gets dusty. I clean it often."
"The router is usually installed by the network company. The fingerprint collected might not be the owner's," Han Bin said.
"Think about it. Did the landlord leave anything in the house or leave his fingerprint?" Tian Li asked.
Chen Luyan frowned and thought for a moment. She shook her head. "I've rented the house for two months. After renting it, I've already cleaned it. I can't remember it now."
"When you signed the lease, did you leave your fingerprint?" Han Bin asked.
"I remember now. When I signed the contract, I didn't want to. The landlord suggested that both parties should leave their fingerprints. He said that it was safer and more reassuring."
"Get the contract."
A moment later, Chen Luyan brought the lease contract. The fingerprint was stained with ink. There was no need to collect it. It could be directly compared.
After some comparison, Reuven confirmed, "The fingerprint on the lease contract matches half of the fingerprint collected from the camera. This person is very suspicious."
Because the camera only collected half of the fingerprint, Reuven could not be 100% sure that it was the same person's fingerprint.
However, this was enough for Zeng Ping and Han Bin.
In a case, the possibility of two people having the same fingerprint was almost negligible.
You've already exceeded your reading limit for today. If you want to read more, please log in.
Login
Select text and click 'Report' to let us know about any bad translation.
