After 100,000 simulated crimes, I became an ace detective.

under normal circumstances.

The vast majority of monitoring retention periods are between 15 and 30 days.

In those urban main roads, as well as official organizations such as banks, hospitals, and police stations, surveillance videos will be retained for a slightly longer period of time, up to about three months.

and.

The current working principle of surveillance does not require someone to delete videos and free up space, but will actively replace those videos.

Therefore, there should have been no relevant surveillance left for this case that occurred half a year ago.

But Su Ming was not very worried about this.

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

It's even possible... to copy all the surveillance videos of Lan Cai'er wherever she appeared in the ten days before the incident.

There is no doubt that this is a very tedious 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 completely find out the murderer behind the scenes, no matter how tedious the work is, a lot of time will definitely be spent to preserve some things that may contain clues.

......

now.

After hearing what Su Ming said.

Chen Sheng nodded without hesitation, then started searching on the multimedia computer in front of him, and spoke in a slow and confident voice.

"Team Leader Su."

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

"To be honest, the murderer of this case was never found, and it was also 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... videos related to Lan Caier in the short term."

"I'm just worried that if something is discovered later, but the relevant investigation records or surveillance videos cannot be found, it will be troublesome."

"Yes, I found it!"

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

Not finished yet.

Su Ming shook his head slightly, interrupted Chen Sheng's subsequent words, rubbed his chin and said seriously.

"No, Director Chen."

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

"Based on previous information, the ghost should be a very cautious criminal who will find ways 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 psychologically and mentally collapse completely, and actively put her neck under the butcher knife he prepared."

"As long as he is sure that the victim cannot escape his grasp, he will follow him and wait for the best opportunity, like a true ghost like a tarsal maggot."

"So, the ghost will definitely try to get rid of surveillance as much as possible to reduce the probability of exposure. In a place like the elevator where his whereabouts are [-]% recorded, will he really leave?"

"I think... the ghost will most likely choose the more concealed stairs, right?"

"Not only can it avoid the surveillance of the elevator, but it can also avoid other residents in the apartment building with a high probability, further improving the degree of concealment."

"In such high-rise residences with elevators, even the residents on the second floor basically only use the elevator. The most items on the stairs are all kinds of sundries."

Speaking of it.

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

"Bureau Chen."

"Lancaire's family is not bad. If nothing else happens, the single apartment she rents should be a new community that was just built."

"Then, this type of community will divert traffic from people to vehicles, and stairs can be accessed from the underground parking lot to each building."

"In addition, Jiahe TV station's working hours are at eight in the morning. If the ghost takes action against Lan Cai'er's orange cat, it must avoid the time when Lan Cai'er is at home."

"So we only need to look at the time period from eight o'clock in the morning to the time when Lan Caier received the news and then her mood changed."

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

It is clear.

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

Su Ming had already narrowed down the entire search scope to a very considerable level that would not waste too much time.

After listening to Su Ming's words.

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

Thirty seconds passed.

Chen Shengcai finally turned to the surveillance video that was most likely to reveal traces of ghosts, and then he spoke with some emotion.

"Hey, the more I think about it, the more pity it becomes."

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

"If we could check more of these related videos, we might be able to dig out the ghost sooner."

"No, even if we check the surveillance video in depth, we probably won't check nine days ago. At most, we will only check whether there is anything unusual in the two or three days before Lan Cai'er's accident."

"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 the residential complex where Lan Caier lives.

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 first 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 Cai'er's rented bachelor apartment, and took away the underage orange cat to cover Lan Cai'er'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 [-]:[-].

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