Chapter 233 Playback at 16x speed, looking for traces of ghosts

Under normal circumstances.

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The retention period of most surveillance is between 15 and 30 days.

For those main roads in the city, as well as official organizations such as banks, hospitals, and police stations, surveillance videos will be retained for a little longer, up to about three months.

Moreover.

The working principle of surveillance now does not require someone to specifically delete the video and free up space, but will actively replace those video recordings.

So this case that happened half a year ago should not have any relevant surveillance left.

But Su Ming is not very worried about this.

Because, judging from the professionalism that Chen Sheng just showed and the attention he paid to this case, it is impossible for him to forget to back up the relevant surveillance videos.

It is even possible... to copy all the surveillance videos of Lan Caier in any place where she appeared more than ten days before the incident.

There is no doubt that this is a very cumbersome project.

But under the pressure of solving the murder case, the influence of public opinion, and Chen Sheng's inner pursuit of truth and justice.

In order to thoroughly find out the murderer behind the scenes, no matter how tedious the work is, he will definitely spend a lot of time to keep some things that may contain clues.

......

At this moment.

After hearing Su Ming's words.

Chen Sheng nodded without hesitation, and then directly searched in the multimedia computer in front of him, and said slowly and confidently.

"Team Leader Su."

"Wait a moment, I'll look for the copied surveillance video."

"To be honest, we couldn't find the murderer at the beginning, and it was the only unsolved case in Yangliu District in the past ten years."

"So, even though there weren't as many clues and breakthroughs as there are now, I still copied all the videos related to Lan Caier in the short term."

"I'm just worried that if there are any discoveries later, I won't be able to find the relevant investigation records or surveillance videos, which would be troublesome."

"Got it, found it!"

"This video is the elevator surveillance video of the single apartment where Lan Caier rented nine days before she was killed. Maybe you can take a quick look at it first..."

Before he finished speaking.

Su Ming shook his head gently, interrupting Chen Sheng's subsequent words, stroking his chin and said seriously.

"No, Director Chen."

"I think...it is probably unnecessary to watch the elevator surveillance video."

"Based on the previous information, Ghost should be a very cautious criminal who will try every means to hide his whereabouts."

"This can be seen from the fact that he was able to let Lan Caier live for seven more days, just to make her mentally and spiritually collapse completely, and actively put her neck under the butcher knife he prepared."

"As long as he is sure that the victim cannot escape from his palm, he will follow him and wait for the best opportunity, just like a real ghost."

"So, Ghost must try his best to get rid of surveillance to reduce the probability of exposure. Will he really go to the elevator, where his whereabouts will be recorded 100%?"

"I think...Ghost is likely to choose a more hidden staircase, right?"

"Not only can it avoid the elevator's surveillance, but it is also likely to avoid other residents of the apartment building, further improving the concealment level."

"In this kind of high-rise residential building with elevators, even the residents on the second floor basically only use the elevator, and the most common things in the staircase are various sundries."

Speaking of this.

Su Ming paused for a moment, looked at Chen Sheng in front of the projector, and continued to ask.

"Director Chen."

"Lan Caier's family is not bad. If nothing unexpected happens, the single apartment she rents should be a newly built community."

"Then, such communities will have separate lanes for people and vehicles, and can go directly from the underground parking lot to the stairs of each building."

"In addition, Jiahe TV's working hours are 8 o'clock in the morning. If the ghost attacks Lan Caier's orange cat, it must avoid the time when Lan Caier is at home."

"So we only need to check the time from 8 o'clock in the morning to the time when Lan Caier received the message and then her mood changed."

"People who enter the underground garage, or vehicles that drive into the underground garage, to determine the whereabouts of suspicious people and ghosts."

Obviously.

By inferring the ghost's personality and completing the information of this case.

Su Ming has narrowed the entire search range to a very considerable level that will not waste too much time.

After listening to Su Ming's words.

Chen Sheng paused for two seconds to think, then nodded in agreement and began to look for the specially saved surveillance video.

Thirty seconds passed.

Chen Sheng finally found the surveillance video that was most likely to reveal the ghost's traces, and then he spoke with some emotion.

"Hey, it's really a pity the more I think about it."

"At the beginning, basically all my energy was focused on the people around Lan Caier, thinking that this case was likely to be committed by an acquaintance."

"If I could check more of these related videos, maybe I could dig out the ghost earlier."

"No, even if I check the surveillance video in depth, I don't think I would have checked nine days ago. At most, I would have checked two or three days before Lan Caier's accident to see if there was anything unusual."

"I can only say that thanks to my past experience in handling cases, I feel that these surveillance cameras may still be of some use, otherwise I might not be able to get them this time."

While Chen Sheng kept sighing, he also turned on the surveillance video and adjusted the time to after eight o'clock, which was the time after Lan Caier went to work at the TV station.

The location of this surveillance camera is the entrance to the underground garage of Lan Caier's rental community.

in other words.

Anyone who enters from the underground garage will inevitably be captured by this camera.

But compared to the elevator, being photographed by this underground garage entrance camera is not an important matter at all, and it was only nine days before the incident.

It is extremely rare for the police to investigate the surveillance of the nine days before the incident.

Not to mention.

Among the many surveillance videos, the probability of selecting the inconspicuous underground garage entrance is undoubtedly several times lower.

At the same time, another surveillance video of the entrance to the underground garage of Lan Caier's rental building was opened at the same time.

In order to dig out the ghost as soon as possible.

Chen Sheng directly adjusted the playback speed to sixteen times, and first went through the general situation.

According to the records of the investigation.

The time when Lan Caier broke down emotionally in the middle of work was specifically at ten o'clock in the morning, that is to say...from eight o'clock to ten o'clock, a total of two hours.

The ghost came to this community specially, broke into Lan Caier's rented bachelor apartment, and took away the underage orange cat to cover Lan Caier's mouth.

...

This moment.

Su Ming said nothing more, all his eyes focused on the projection screen in front of him.

Although the current playback speed is sixteen times, when passing through the gate of the underground garage, you need to slow down and pass slowly.

Therefore, the difficulty of overall judgment and analysis is not as high as imagined.

One minute.

Two minutes.

three minutes

...

And when the third minute just passed, the internal time of the surveillance video played reached 8:50.

A van with a metallic silver color, used to repair leaks in houses, toilets, and minimally invasive leak repairs, appeared in the surveillance video at the entrance of the underground garage...