Ghosts are impossible.

But why is there no one in the video?

"Team Ren," Chen Yan turned his head and looked at Ren Hongfeng with a serious expression: "Wang Xuan just said, 'No one was found in the video.' Is it true?"

"Of course it's true. I've also seen the video..."

Um?

The expression on Ren Hongfeng's face suddenly stiffened!

Gan!

Dark under the lamp!

How could such an important clue be missed?

When the deceased was alive, he left the live broadcast and heard a knock on the door to pick up a courier.

They found the courier boy through the order information and contact number in the deceased's mobile phone.

Have already asked.

However, the courier boy has been found, why is he not in the video?

"Team Leader Chen, this was our negligence and we left this important clue behind!"

Since the delivery boy is real, there must be something wrong with the video.

"Wang Xuan, immediately organize manpower to investigate and question the security guards on duty in the monitoring room that day to find out what went wrong with the video!"

Wang Xuan was not stupid. As soon as Chen Yan asked, he also noticed the problem.

Such an obvious problem, why wasn’t it discovered?

At this moment, Wang Xuan was extremely upset.

Five days, a total delay of five days!

"Don't blame yourself," Chen Yan patted Wang Xuan on the shoulder: "This kind of neglect is common and is not a problem of your sense of responsibility."

"It's like looking for a lighter when you smoke. The lighter is obviously in your hand, but you don't notice it."

In reality, such things are not uncommon.

While on the phone, I was looking for my cell phone, holding the keys in my hand, looking for the keys everywhere...

Many people have experienced this.

"And..." Chen Yan looked up at the surveillance camera: "The problem shouldn't be over there in the surveillance room, but here!"

…

The problem here?

Wang Xuan and Ren Hongfeng looked at Chen Yan with some confusion.

The two looked up at the surveillance camera again.

The camera's red light flashes and it should be in normal working condition.

What could be wrong?

Haha, what's the problem?

There is no problem in ordinary people's eyes.

However, in Chen Yan's eyes, the problem was huge.

As soon as he got off the elevator, Chen Yan opened the olfactory gene lock and the visual gene lock.

The ventilation windows in the corridor are always open and there is no special smell.

Even if Chen Yan turned on the olfactory gene lock, he found nothing unusual.

However, when the eyes that turned on the gene lock looked at the surveillance camera, they saw a problem.

"Wang Xuan, go get a ladder."

ladder?

Wang Xuan was stunned, not understanding why Chen Yan wanted the ladder, and looked at Ren Hongfeng with some confusion.

Ren Hongfeng's expression changed: "What are you looking at me doing?"

"Go find the ladder!"

"Oh oh... go right now, go right now..."

Ren Hongfeng looked at Chen Yan with some embarrassment.

"Team Leader Chen," Ren Hongfeng's old face turned red: "We didn't find such a big loophole because I was negligent... This guy Wang Xuan usually performs well..."

Chen Yan smiled and waved his hand: "Team Ren, you don't have to do this."

"Although the clues were discovered a little late, even if they were discovered at that time, they might not be of much use."

"The other party is very deliberate and must have been planning for a long time. It is impossible to pass this and leave too many traces."

Ren Hongfeng looked at Chen Yan with slightly grateful eyes.

In case handling and investigation, everyone has a division of labor.

Wang Xuan's duty is to investigate and analyze surveillance videos.

As a result, such a big mistake was made, and even a punishment would be light.

However, as Chen Yan said, this was not caused by Wang Xuan's subjective intention to make a mistake.

Besides, as management, Ren Hongfeng and others did not discover this problem, so they do have to bear some responsibility.

As long as Chen Yan writes down the incident, it will be fine if the case is solved. At most, Ren Hongfeng will get no credit.

Wang Xuan gave him a conversation and it was over.

However, if the case is not solved, they will take the blame.

But now, Chen Yan obviously doesn't want to get entangled in this matter.

"Team Leader Chen, thank you!"

Ren Hongfeng slightly bent over and clasped his fists, expressing his sincere gratitude.

"Thank you for nothing," Chen Yan helped Ren Hongfeng up: "We are in the trenches now, so we have nothing to thank..."

At this time, Wang Xuan came back with the ladder: "Captain, the ladder is here."

Ren Hongfeng put up the ladder himself: "Team Leader Chen, the ladder is ready."

Chen Yan nodded and climbed up the ladder.

After a while, Ren Hongfeng and Wang Xuan came forward and took a closer look.

It turned out to be a piece of cardboard no bigger than a fingernail, with patterns on it.

"Microphoto?" Ren Hongfeng discovered at a glance that the pattern on the paper was the vacant scene in this corridor.

Chen Yan nodded: "It's just a miniature photo."

"The other party pasted the photo on the camera in advance, so that the image uploaded to the monitoring room by the camera will be the pattern of the photo."

"There are dozens of screens facing the control room, so there is no possibility of discovery in a short period of time."

Wang Xuan on the side looked at Chen Yan in surprise.

Three meters high, there was a photo no bigger than a fingernail. How did Chen Yan discover it?

Raising his head, Wang Xuan looked at the camera and found that there was no difference from just now.

In fact, it’s not to blame that Ren Hongfeng and the others didn’t discover it.

The microphotographs produced by the other party are double-sided.

On one side is the corridor control screen, facing the camera.

On the other end, it turned out to be an image from a surveillance camera.

At first glance, to a normal person, there is no difference at all.

It's actually not difficult to make something like this, it's very simple.

But it takes a lot of effort, especially having a certain understanding of surveillance videos.

Otherwise, the size of the photo, the clarity of the pattern, etc. will affect the results of the video uploaded by the surveillance camera.

If it is too fake, it will be easily discovered by the monitoring room.

However, it is obvious that the murderer worked hard.

After all, even detective Wang Xuan was temporarily blinded.

If Chen Yan hadn't turned on the visual gene lock, he wouldn't have discovered this anomaly.

"Wang Xuan," Chen Yan put the photo in the evidence bag and looked at Wang Xuan seriously: "Immediately investigate all the surveillance videos before the incident."
To be continued...