Chapter 22 Su Ming brings a new criminal investigation technique, shocking Xu Changsheng!!!

The murderer is a left-handed person!

This conclusion made Xu Changsheng stunned for a moment.

Then.

He immediately stepped forward and looked at the screen, his face full of astonishment and confusion.

"No, Xiaoming."

"How did you judge that the murderer is a left-handed person?"

"As for."

"The muscle texture and incision of the cooked corpse, don't they have a certain degree of randomness? Can they still be used as clues to infer?"

Obviously.

Su Ming judged the murderer's dominant hand by the incision and texture of the victim's body.

This point.

It really exceeded Xu Changsheng's understanding.

Because.

In criminal investigation.

Judging the murder weapon and attack direction by the victim's wound is a technology that exists and is also a common technique for solving cases.

But.

This case of dismemberment at Magic City University has a significant premise.

That is.

The victim's body was cooked in advance and then cut into small pieces.

Xu Changsheng has never seen...

In this case.

It is also possible to judge the killer's dominant hand through the texture and incision!

......

Looking at Xu Changsheng's astonished expression.

Su Ming was not surprised at all, and had already expected it.

Because.

Looking for clues through the cooked corpse's muscles and textures has long been beyond the ability of normal criminal police.

In real criminal investigation.

It is also extremely difficult to judge the killer's dominant hand, and it can even be said that it is impossible to do it.

Because.

When the killer commits the crime, he basically does whatever is natural, convenient, and can achieve the goal.

Even if the killer in a certain case is left-handed.

But in order to achieve the purpose of killing, it is very likely that when he sees that his right hand is closer to the murder weapon, he will directly pick it up and attack the victim under the effect of adrenaline.

Because there are too many uncertainties, it is extremely difficult to judge the dominant hand.

Like in TV dramas.

It is simply impossible to judge the dominant hand by just looking at the wound.

If Su Ming had not used various murder methods to try to achieve the requirements of a perfect crime, he would definitely not notice such details.

It is even more impossible to be so confident...

The murderer is a left-handed person.

At this moment.

Su Ming pasted two different photos of the victim's body in front of the screen.

"Brother Sheng."

"It sounds incredible to get clues through muscle texture and incision, but I will explain it briefly..."

"You will know why I can come to this conclusion."

At this point.

Su Ming did not hesitate at all, and pointed to the photo of the victim's body above.

This photo.

It was the first bag of body parts of the victim found, which was taken away by the sanitation worker as cooked beef and almost eaten.

"Brother Sheng, take a good look."

"The muscle texture of the victim's body in this picture is obviously deeper on the right and shallower on the left, and the cut is also clearer on the right."

"You can imagine it in your mind."

"At this time, a large piece of meat is placed on the chopping board. When a normal person cuts meat, he will definitely use more force at the beginning, because he doesn't need to worry about the knife hitting the chopping board."

"And when he cuts to the last point, he will subconsciously reduce the force to avoid making too loud a sound."

"This is everyone's inertia, or subconscious behavior, and if you are in the murderer's environment, you will definitely pay more attention to the size of the sound."

"Such force and impact The force method will cause the area where the force is greater to have clearer texture and cuts than the area where the force is applied. "

"When the murderer cut the victim's body, he was actually more careful than when we cut meat normally, which would definitely cause this uneven use of force. "

"Now the body parts in the picture. "

"The texture and cuts on the right are obviously clearer than those on the left. According to the normal meat cutting posture of a person, it is undoubtedly cut with the right hand. "

"This information means..."

"When cutting the victim's body, the murderer cut with the right hand. "

This explanation from shallow to deep.

It made Xu Changsheng secretly take a breath of cold air, and his right hand was placed horizontally and vertically in the shape of a hand knife, cutting down in the air to feel the change of force.

The result.

Just as Su Ming said.

Once you feel that you are about to touch the cutting board, you will subconsciously reduce the force. This is the inertia of the human body that is difficult to overcome!!!

After confirming that this clue can be verified.

Xu Changsheng sucked his teeth hard, put down the wolfberry water in his hand, and frowned even more.

"Xiao Ming, your method of judging the dominant hand by texture and incision..."

"I can generally agree with 90% of it."

"But I feel that the application scope of this criminal investigation technology is also very narrow. After all, there are not many criminal suspects who can be like the murderer of the dismemberment case in Shanghai."

"Cooking the body so calmly and dismembering it carefully, most of them may not have time to dispose of the body, but here it can determine the dominant hand."

"But."

"It's very strange, judging by this detail..."

"The dominant hand of the murderer should be the right hand, not the left hand. How did Xiao Ming get the clue of left-handedness?"

Although the application scope of this criminal investigation technology is very narrow.

But now there are also real gains, from those corpse photos from 20 years ago, the key clues found! ! !

Xu Changsheng had to admit that Su Ming's talent for solving cases was amazing and terrifying.

As a criminal policeman for so many years, he never thought that...

It was actually possible to judge each person's dominant hand from the different strength of cutting meat.

But he was getting more and more confused.

Obviously, now through the body parts, it can be judged that the dominant hand is the right hand, but why is Su Ming so sure that the murderer is left-handed?

It didn't let Xu Changsheng doubt for too long.

Su Ming pointed to the corpse photo below.

This photo.

It is a photo of the victim's cooked head. The multi-angle display looks particularly hideous and terrifying, enough to give ordinary people nightmares.

"Brother Sheng, look carefully at the cut on the neck."

"You should be able to see it very clearly according to the technique we used to determine the direction of the body parts cut..."

"On both sides of the cervical vertebrae of the neck, one side has more obvious muscle texture, while the other side is a bit fuzzy and unclear."

"But it is different from the direction of the previous body parts."

"The muscle texture on this neck is more obvious on the left side, while the right side is the result of the murderer's obvious reduction of strength."

"It can be concluded that the murderer held the knife with his left hand to cut the victim's body and head. Now there are two completely different answers."

"When cutting the body parts, the murderer held the knife with his right hand, and when cutting the head, he held the knife with his left hand."

"It seems difficult to distinguish, but in fact, you can get the answer with just a little thought."

"Since the body parts are pure muscle, the murderer does not need to use special force, and when cutting the head, because of the existence of the spine bone..."

"The murderer must exert more strength!!!"

At this moment.

There is no need for Su Ming to continue explaining.

Xu Changsheng slapped his thigh suddenly, and said excitedly with sudden realization.

"When cutting hard objects or lifting heavy objects."

"Everyone will subconsciously use their dominant hand to provide greater strength. This is unavoidable."

"So by comparing the two things of cutting the body parts and cutting the neck bones, we can draw a very clear conclusion..."

"The murderer is left-handed, so he used his left hand to cut the bones."

"The reason why he used his right hand to cut the body parts was actually a deliberate cover-up to confuse the police and clear his suspicion!"

"But why do you deliberately hide your left-handedness?"

"Although there are fewer left-handed people among ordinary people, it should not be necessary to deliberately hide it, unless it is..."

At this point.

Xu Changsheng paused for two seconds, looked at Su Ming with a gleam in his eyes.

"Unless it is..."

"The murderer's profession is somewhat special, plus the characteristic of being left-handed, it is easy to find him!!!"