Chapter 369 A Button

The scratches were very thin, and the marks left were not particularly deep.

However, the fact that scratches could be left on the bones indicated that the murderer had used great force when stabbing!

With the help of the visual gene lock, the scratches on the ribs gradually magnified in Chen Yan's eyes.

The first is to judge the palm holding method.

The murderer stabbed the victim's back from behind.

The sharp blade pierced the back chest and penetrated the heart, and the tip of the knife finally hit the inside of the ribs, leaving scratches.

This kind of penetrating injury shows that the murderer's force was very strong at the time.

To achieve such a strong force, the general method of holding a knife is not enough.

The force of stabbing the chest from behind with a forehand holding the knife is not so strong.

If you want to penetrate with one knife, you should hold the knife with your backhand.

From top to bottom, swing out!

With the help of the inertia of the knife, pierce the back chest with one knife, then penetrate the heart and reach the ribs.

While observing, Chen Yan's right hand waved slightly, imitating the stabbing action of the murderer at the time.

Zhang Man saw Chen Yan's action and knew what Chen Yan wanted to do.

Reconstruct the murder scene.

In this way, the crime scene and the process of the crime can be determined to a certain extent.

Thus, some characteristics of the murderer can be inferred.

Next is to analyze the direction of the scratches.

Chen Yan lay beside the ribs and judged carefully.

The knife scratched the ribs, and the depth of the marks was different from the beginning to the end.

Generally speaking, any scratches produced by the knife touching the object are from shallow to deep.

The same is true when the tip of the knife touches the ribs.

From the initial contact to the end, the knife stopped moving due to the blockage of the bones.

The scratches are also a process from shallow to deep.

Observe carefully, the marks on the ribs, the depth changes from bottom to top.

This is interesting.

The murderer held the knife in his backhand and stabbed the victim suddenly.

The direction of the knife's movement was from bottom to top...

What does this mean?

It means that the position where the murderer raised his hand to attack was lower than the victim's chest!

Standing up, Chen Yan waved his arms in the air.

After a moment, Chen Yan looked at Zhang Man: "Sister Zhang, please simulate the crime scene with me."

Zhang Man nodded: "Okay!"

Zhang Man's height is 167, about the same height as the victim.

Standing behind Zhang Man, Chen Yan kept adjusting his position.

He held a scalpel taken from the dissection table in his right hand.

With Chen Yan's height, if he cut Zhang Man from behind, if the tip of the knife went through the heart and pressed against the ribs, then the direction of the rib scratches caused by the tip of the knife should be from top to bottom, from shallow to deep.

Chen Yan slowly bent his legs and lowered his height.

In his mind, Zhang Man's body seemed to fade away slowly.

Only a skeleton remained.

The third rib protected the heart, and the scalpel in his hand kept adjusting its position.

Puff!

The tip of the knife went down and pierced into the back of the chest.

Then it penetrated the beating heart and pressed against the third rib!

Crack!

The harsh friction sound seemed to resound in Chen Yan's mind.

Everything happened in his imagination.

The scratches, from bottom to top, just correspond to the scratches on the skeleton.

At this time, Chen Yan was almost squatting on the ground.

1.2 meters!

At this time, Chen Yan's arm height was 1.2 meters, just at the position of Zhang Man's armpit.

And Chen Yan's height at this moment was 1.4 meters!

"The murderer is about 1.4 meters tall!"

"And... the tool he used to commit the crime... is very special!"

Very special.

Yes.

Why is it special?

Because the shape of the human ribs is different from that of ordinary animals, especially the pork chops, lamb chops or steaks that people often eat.

In general reptiles, the ribs are not fully wrapped in the part that protects the internal organs.

In the abdomen, from top to bottom, it gradually opens.

However, humans, as well as mammals that can walk upright, such as monkeys, gorillas, baboons, etc., have fully surrounded ribs.

Starting from the sternum, it spreads in a circle, forming a cage shape, protecting all important organs inside the ribs.

Therefore, even if the murderer kills the victim from behind,

If the knife used by the other party is just a sharp knife that we usually use, then it will definitely touch the ribs behind.

In other words, if a general knife wants to penetrate the chest cavity from the back of the human body, pierce the heart, and injure the inner side of the third rib, it will first injure the ribs behind.

But Chen Yan did not find any scars on the back ribs of this skeleton.

Therefore, the knife used by the murderer is very thin and long.

The width is very narrow, so that it can penetrate the back ribs without hurting the ribs.

The length is sufficient to penetrate the entire chest cavity and hurt the inner side of the front ribs.

So, will the murderer specially create a slender knife to cause this kind of injury?

Unless the other party is a superb blacksmith, but in modern society, blacksmithing...

It's not that there is no such possibility, but Chen Yan thinks this possibility is very small.

Don't forget that Chen Yan once received the knife cognitive map rewarded by the system.

There are ready-made knives that can cause this kind of injury.

In reality, the most used and most common one is... ham slicing knife!

A kind of Western food knife.

Slender and sharp.

With this judgment, Chen Yan focused his attention on the button found in the mouth of the skeleton.

A button!

After Zhao Kuo called the police, the on-site investigators of the Detective Team found an important piece of evidence at the cemetery.

A button with a black background and a gold border.

Ten years ago, when Zhao Kuo buried his father's ashes, he put a lot of burial objects.

However, there must be no buttons inside.

According to local customs, a set of shrouds was buried in Zhao Kuo's father's tomb.

But there will be no buttons on the shrouds.

This is a custom. Shrouds are worn after death.

Because people cannot wear clothes like normal people after death, the structure is special.

In other words, this button can only be brought in by the deceased, not originally in the cemetery.

The quality of the button is obviously very good.

According to Zhang Man's judgment, the deceased should have died 4 years ago.

After so long, the button still looks new, which shows the quality of the button.

"Captain Liu, have you found out where the button came from?"

Liu Qingshan nodded: "I asked several detectives to go to the market to ask, and they all said they had never seen such a button."

In that case...

"Captain Liu, then this button cannot appear in the tomb for no reason."

"So, finding the source of this button is likely to be an important clue to solving the case."

"Compare it online. The quality of this button is very good and the gold edge is gold-plated."

"A button is inlaid with gold edges, and its owner must not be an ordinary person."

"Compare it online, especially on some foreign websites, and compare some special clothing."

China does not have such a luxurious button culture.

On the contrary, in foreign countries, some nobles who have survived to the present pursue the inheritance of clothing, and have high requirements for buttons, brooches and other clothing.

After all, buttons and suits are originally Western clothing, and they were introduced to China in the past 100 years.

"Moreover, the knife used by the murderer is likely to be a ham slicing knife. Focus on checking some chefs' accessories to see if there are such button decorations."

In the previous case, Chen Yan obtained a lot of information in the cognitive map of luxury goods.

"Okay, I'll arrange it now."

The case investigation is progressing.

The DNA information of the skeleton is still being compared.

The missing persons database has been compared and no findings have been made.

Now, the detectives on Liu Qingshan's side are comparing the information in the DNA database.

The results are expected to be available in the afternoon.

However, Chen Yan does not have hope for this comparison.

After handling so many cases, there has never been a successful comparison in this DNA database.

Another is the analysis of organic matter in the cemetery.

This can determine whether the deceased was a corpse or a skeleton when he entered the cemetery.

This clue is clearly related to the clue of the button.

If the deceased was a skeleton when he entered the cemetery, then the button could have been left by the murderer.

Even, the murderer is simply confusing the public.

If the murderer entered the grave with a corpse, which then rotted and ossified.

Then, the button in the mouth of the deceased is likely to be a clue left intentionally by the deceased.

After three hours, all the analysis was completed!