Chapter 571 The Missing Murderer

Chen Yan didn't know whether the murderer would be invisible, but he was certain that there must be someone in the living room before Wang Luyao died.

"Send the body back for inspection first, and wait for the other inspection results to come out."

"yes!"

After the body was sent for examination, Chen Yan went directly to the monitoring room of the community.

Although Zhang Yaoming and others reviewed the surveillance video, Chen Yan believed that there might still be some omissions.

The community where Wang Luyao lives is a new community, and the video surveillance system is very complete.

When he first entered the community, Chen Yan roughly observed the video surveillance layout of the community and found that there were basically no blind spots.

In the building where Wang Luyao lives, there are surveillance cameras in the elevators and corridors on each floor.

"The surveillance system of this community is very complete. There are surveillance cameras in every corner of the community yard, basically achieving full coverage. There are surveillance cameras in the elevators in every building and in the corridors on each floor, except for the walking stairwells. Outside, except for surveillance, there are almost everything else.”

Zhang Yaoming followed Chen Yan and introduced the monitoring situation in the community in detail.

"After Wang Luyao came home from get off work last night, we checked the surveillance video of the whole night, and three people appeared in the surveillance video."

"One was a property janitor. He cleaned, mopped the floor in the corridor and then left."

"There is another person who is Wang Luyao's neighbor. He came home from get off work at 9:30 last night and went out at 8:30 in the morning. He did not come out of the house in the meantime."

"The last person was Wang Luyao's mother. She went to Wang Luyao's house this morning and found that Wang Luyao was dead, so she called the police."

While talking, the two came to the monitoring room of the property company.

The monitoring room is very large. On a super screen, there are monitoring images from various cameras in the community.

"Pull up the video of Wang Luyao after she went out during the day yesterday, and play it at 32x speed."

In the monitoring room, there were already detectives from the Dan City Detective Team. After hearing Chen Yan's order, they quickly operated the computer to retrieve the video.

The reason why Chen Yan retrieved the video from this point in time was because Wang Luyao had a video call with her husband the night before yesterday and went to work normally during the day. Therefore, it was certain that there were no problems at home before Wang Luyao went to work yesterday.

But after Wang Luyao left, there was a possibility of outsiders entering at every point in time.

Soon, the video was retrieved and started playing.

The speed of 32 times is very fast. Others can only see the picture jumping and cannot see the specific situation clearly.

Chen Yan's visual gene lock was opened immediately, and all the images on the big screen were successfully captured and analyzed.

In fact, most of the surveillance pictures are still pictures in the corridor.

This is not a commercial area. Apart from the cleaning staff, only residents come and go.

The building where Wang Luyao lives has two floors and five households, four of which are occupied and one is vacant.

Yesterday morning at 8:10, after Wang Luyao left for work, four more people showed up in the next hour.

Three are Wang Luyao's neighbors, and there is a cleaner who cleans the house.

After that, the corridor remained still for the whole day.

"stop!"

Suddenly, Chen Yan stopped the video: "Go back 30 seconds."

"yes!"

The detective in charge of the operation immediately rewinds the video for 30 seconds.

What appeared on the big screen was a black still image.

"What's happening here?"

"Oh, this is the system restart screen."

The young man in security uniform who has been standing next to the detective operating the computer is the surveillance room monitor on duty today.

"Hello, police officer. My name is Qiao Taining. I am the security guard on duty today. This is the picture of the restart of our surveillance system."

Chen Yan looked at the time, it was 12 noon.

"Why does the system restart? Does it restart every day or only yesterday?"

"This needs to be restarted every day. There are too many monitoring devices in our community, but the storage capacity of the server is limited. 12 noon every day is the automatic restart time set by the system. I heard from the maintenance staff that it is to clean up garbage and keep the system smooth. .”

"How long does it take to restart?"

"five minutes."

five minutes?

Chen Yan looked at the large surveillance screen: "Go on."

"yes!"

An hour later, Chen Yan watched all the surveillance videos.

Problem found.

The murderer was neither a ghost nor did he enter Wang Luyao's home out of thin air.

The other party must be very familiar with the situation of monitoring and restarting in the community, so he took advantage of these 5 minutes.

The murderer should have entered Wang Luyao's home at 12 noon yesterday, and then waited for Wang Luyao to come home from get off work to kill him.

However, according to Chen Yan's observation of the door at Wang Luyao's home just now, the other party did not open the door through violent means or other technical means.

There is a high probability that the other party entered the room with a key.

Five minutes...

The community where Wang Luyao lives is not big, and the building where Wang Luyao lives is very close to the gate. The building is 4 stories high.

During this time, the other party has time to completely avoid all surveillance and enter Wang Luyao's house.

Therefore, Zhang Yaoming's surveillance did not find any doubts during the investigation.

First, the time period of Zhang Yaoming's investigation was wrong, but because it was entirely possible for the other party to escape within 5 minutes, he was monitored.

However, if the other party can go in and avoid surveillance, what about coming out?

Why did the murderer come out so silently?

The surveillance video in the community restarts at 12 noon every day and cycles every 24 hours.

If the other party entered Wang Luyao's house at 12 noon yesterday, how did he leave after killing Wang Luyao.

You know, Wang Luyao's mother arrived at Wang Luyao's house at 8 o'clock this morning, and then called the police.

Therefore, the other party has no time to wait for 12 noon today until the monitoring system restarts again.

How did the other party do it?

Is it fishing in troubled waters?

Chen Yan just saw the scene after Wang Luyao's mother called the police this morning.

Before Zhang Yaoming led the team to arrive, the first person to arrive was actually the security guard.

Upon hearing the death, a dozen property management personnel in the community, including security guards, were the first to rush forward.

There were a total of 12 property management personnel in the video, and Chen Yan remembered this very clearly.

After Zhang Yaoming arrived, in addition to the detectives, these 12 security guards also came out of the room.

Not one more person.

In the video, Wang Luyao's mother collapsed to the ground after opening the door and seeing the body, without entering the room at all.

Then after shouting loudly, he called the police, and then the security guard came in.

Chen Yan originally guessed that if the murderer was a staff member of the community, he would probably hide in the room and then take advantage of the chaos to leave the scene.

However, the number of property management personnel has not increased.

12 people, still 12 people.

This is strange.

The loophole through which the murderer entered the room has been found. What about leaving?

How did he leave?

If you can't find a way for the other party to leave, this is equivalent to a secret room murder case.

In other words, it is impossible to finally determine whether someone sneaked into Wang Luyao's home at 12 o'clock yesterday, taking advantage of the restart of the monitoring system.

Even though the spots on the back and thighs of Wang Luyao's body told everyone that after Wang Luyao died, she once sat on someone.

But how did this person enter the room and how did he leave?

evidence!

If there is no evidence, there is no way to knock the corpse to tell Chen Yan's clues.