Bro, you are a policeman, not a thug.

Outside the detention center.

Xiao Mu and two police kings sat on the curb, drinking water and thinking about the case.

"What did you think of?"

Zhao Xiaotang took out a cigarette and handed it to Xiao Mu and then to Qiao Jie.

"I thought of a sentence."

Xiao Mu, who took the cigarette, smiled and said, "A man can't say no, he has to do it even if he can't."

"Haha..."

The two middle-aged uncles understood it immediately and laughed.

In an instant, the atmosphere became a little lively.

"Uncle Zhao."

Xiao Mu asked, "Do you have any ideas?"

"I've thought of everything I can think of."

Zhao Xiaotang shook his head and looked at Qiao Jie.

"My mind is empty too."

Qiao Jie also shook his head.

This case is too abnormal.

All the clues, evidence, and processes clearly point to the suspect Dong Qiang.

But the three of them knew that it was probably not Dong Qiang who did it.

So, what method did the other party use to deceive everyone.

Deceive everyone's eyes?

"Since you can't think of it, even I can't think of it."

Xiao Mu suddenly laughed, "Then there is only one possibility."

Zhao Xiaotang and Qiao Jie's eyes lit up and stared at the boy in front of them.

"Blind spot of knowledge."

Xiao Mu raised his hand and pointed to his head, "That is a field that the police have never been exposed to, so we don't know how the other party did it!"

People can't be omniscient and omnipotent.

It's impossible to be proficient in all 365 trades.

"Enough rest."

Xiao Mu threw away the cigarette butt, stood up, and stretched.

"Go find out the missing hour first!"

...

Crime scene.

Xiao Mu began the second round of investigation.

He was looking for something.

Something ignored by all the police.

At the same time, it was something that could make 'time disappear'.

Whose time?

The suspect Dong Qiang's!

Why did all the evidence point to him, but he said he didn't commit a crime, and didn't admit his crime process in the surveillance video?

So if the person in the video is really not Dong Qiang.

How did the real perpetrator do it?

Clothing, height, appearance...

Even if it is plastic surgery, it is impossible to be exactly the same, let alone twins.

But there is no problem with the video.

Some people may say, is it possible to have a second personality, is it possible to be hypnosis?

Remember that Qiao Jie had found a psychology expert before?

If this is the case, how could the psychologist not see it?

There is another point, ordinary people may not know much about hypnosis.

Through Qiao Jie's narration, Xiao Mu learned a lot.

Hypnosis is not omnipotent.

And there are too many restrictions.

Even if someone is hypnotized and asked to do something.

The hypnotized person will not be completely obedient.

For example, the psychological bottom line of the subject cannot be broken.

Otherwise, hypnosis will be forcibly lifted!

What is the bottom line?

For example, if someone asks you to kill your parents, can you do it?

Not to mention killing parents, even if you kill people, 99% of people dare not.

This is the bottom line.

No matter how powerful the hypnotist is, he cannot make the subject cross the bottom line.

Killing is just one of them.

There are too many bottom lines like this in everyone's heart.

These are not things that a hypnotist can forcibly trample on.

If there is really a hypnotist who can do it.

That's not hypnosis.

It's magic, immortal magic!

Xiao Mu squatted down and squatted in front of the entrance door to check carefully.

What is he looking at?

Foot pads!

Many people have foot pads at their doorsteps.

Xiao Mu checked the scene and even checked the foot pads at the beginning.

However, he overlooked a problem.

Do you remember what the suspect Dong Qiang said?

The password door of his girlfriend's house could not be opened with his fingerprint, and then the door opened by itself.

At that time, Dong Qiang suspected that someone opened the door.

But when he rushed into the house, he found his girlfriend lying on the ground and was stunned.

So who opened the door for him?

What does this have to do with Xiao Mu looking at the foot pad?

Hypothesis.

Was there really a third person who opened the door for Dong Qiang at that time?

But Dong Qiang hurried into the living room and was stunned by his girlfriend lying on the ground, so he didn't notice it?

If this person existed, where would he be at that time?

Behind the door!

If this conjecture is true.

The footprints of that person must appear on the foot pad.

Some people may ask, if someone wears shoe covers, will there be footprints?

If you can ask this question, you must not understand criminal investigation.

It has been mentioned in the previous article.

The room will have "floating dust" as the air flows.

To put it bluntly, it is dust and particles in the air.

These things will enter the room with the air and fall to the ground.

No matter what you are wearing, as long as you step on it.

Or you will "compact" these floating dust, or you will "take away" the floating dust.

Whether it is compacted or taken away, it will inevitably leave traces!

Don't be fooled by movies, like wearing gloves and shoe covers to commit crimes, you can't be found.

That plot is so stupid, I don't know how many criminal investigators almost laughed after seeing it.

Just like the police, wearing gloves and shoe covers is just to reduce traces, not to mean no damage!

Now, Xiao Mu has discovered a serious problem.

There were no traces of footprints on the floor mat in front of me.

Even the suspect Dong Qiang's footprints disappeared!

Why did we only find out now? How could others ignore it?

Because the video showed that Dong Qiang entered the room in a "quick" way.

His footprints also appeared on the floor outside the foot pad.

Everyone thought that he took a big step and stepped over the foot pad.

So this foot pad was ignored by everyone, and Xiao Mu didn't pay much attention to it.

Is it really like this?

No!

When the door opens outward, people will naturally avoid the distance from the door.

To prevent being hit by the door.

What is the distance of this door?

When you start to take steps from the distance to avoid the door, no matter how big your steps are.

How far can a normal person take?

If this distance is added to the distance of a foot pad, how far is it?

How did you cross this foot pad, a one-legged horse?

I wonder if anyone has heard of this old saying: Half a step when you see a threshold!

It means that as long as there is a door and a threshold in front of you.

People's steps will not be big.

Because many people may have the experience of being tripped by a threshold.

The body's subconscious mind will raise its knees when it encounters a threshold.

When a person walks, not when he runs.

When the knees are raised, they will not take big steps.

Normal situation.

Dong Qiang's first step into the room must have stepped on the mat.

So what about his footprints?

Not just his footprints.

If there was really someone at that time, that person must have stepped on the mat.

Can we assume that the footprints of two people disappeared?

If so.

The mat in front of you is not the original mat.

If that is true.

Was there another person here at that time?

What did this person do?