Coroner Coroner

"Why?" Officer Jiang Gu cast a curious look.

The answer is simple.

Because according to the laws of science summed up by Lin Xinyi in the past:

There are indeed supernatural forces in this world, but these supernatural forces never appear in criminal cases.

Otherwise, how can famous detectives continue to get along?

A comminuted fracture may be a powerful vajra palm.

The sudden death by poisoning may be due to the magical power of five poisons.

The recording evidence may have been faked by the voice changer.

The person captured by the surveillance is not necessarily a real person, it may be disguised by someone else using disguise.

Even the murder secret room that famous detectives love to crack may be a false secret room created by the murderer directly jumping out of the window from the height of the 5th floor.

Anyway...

If these supernatural forces are mixed into criminal investigation reasoning, it will be impossible to reason at all, and it can hardly be called criminal investigation.

And this world is the world of a detective.

God will not embarrass these famous detectives and let them lose their jobs for scientific reasons.

Therefore, Lin Xinyi can be sure that the serious injury to the deceased's chest was not caused by the palm of some martial arts master.

However, such an answer certainly cannot be said directly.

Fortunately, Lin Xin had a very likely guess about the cause of the deceased's death.

So he didn't rush to answer Officer Jianggu's question, but silently picked up the file and carefully observed the close-up photos of various parts of the unknown corpse, especially the area where the deceased's ribs were comminuted.

"This is not an unarmed attack injury."

"It was a gunshot wound from a shotgun close-range bombardment."

Lin Xinyi finally gave a positive conclusion.

As he spoke, he pointed to the close-up photo of the deceased's back:

"see it?"

"There is still part of the skin attached to the back of the deceased, and on this part of the skin and flesh, there are multiple hole-like damages visible to the naked eye."

"That's what the lead shot from the shotgun does when it goes in the chest, passes through the chest, and flies out the back."

"What?" Police officer Jiang Gu was slightly taken aback: "These holes on the deceased's back are bullet holes caused by shotgun shots?"

"But, Mr. Lin..."

He took a closer look at the close-up photo of the dead man's back:

"Isn't this a hole gnawed by maggots?"

"How can you be sure they are shotgun holes?"

There were indeed many holes in the back of the deceased.

But there were many tiny maggots wriggling in those holes.

They crawled in and out of these holes, gnawing at the flesh and blood of the corpse.

At first glance, people would subconsciously think that these holes were gnawed out by these little guys.

"This is the difficulty of identifying gunshot wounds in highly rotten corpses."

Lin Xinyi explained calmly:

"On a fresh corpse, the identification of gunshot wounds can be said to be very simple."

"You don't need to analyze the shape of the injection and exit like a forensic doctor, and you don't need to know how to observe the embedding of gunpowder particles and the adhesion of gunpowder smoke. Ordinary people can tell whether the deceased was shot to death with a gun."

There was a heart-piercing hole in the corpse. Of course, it couldn't be more obvious what the murder weapon was.

"However, this simple method of visual identification cannot be applied to this kind of highly decayed corpse."

"Because the bullet holes will be severely deformed after the flesh and blood rots and festers, and its shape is very close to the 'wormhole' drilled by maggots."

"And the flies lay eggs on the corpse, and they really like to drill into the holes on the corpse."

Flies like to drill holes to lay their eggs.

Because this allows their larvae to break through the barrier of the skin directly after hatching, to eat the flesh and blood of the corpse more easily, and obtain energy for growth and development.

Eyes, mouth, nostrils, ears, and some weird holes...

These are the places where the fly maggots have the highest priority.

When Lin Xinyi solved the "Chigui Village Fire Festival Murder Case" last time, he relied on the maggots found in the back door of the deceased.

The same goes for:

If a corpse has bullet holes, those bullet holes, overflowing with delicious blood, are sure to attract the first flies that lay their eggs.

The fly maggots will first hatch from the wound inside the bullet hole and eat the flesh and blood around the wound.

Over time, the meat will be eaten up by fly maggots.

The bullet holes on this piece of meat will naturally no longer exist.

Even if the flesh and skin of the shot site hadn't been completely gnawed off, just like the current corpse, bullet holes could still be seen from the remaining skin.

These bullet holes have long been deformed and enlarged due to flesh decay and fly maggot erosion, and their shape has changed.

It no longer looks like a bullet hole, but more like a wormhole eaten by maggots.

"If the deceased's clothing was left at the scene, the bullet holes on the clothing can be used to identify the gunshot wound."

"But in this case, the deceased..."

The dead man had no clothes on him at all.

Not only was there no clothes, but none of the deceased's ID, mobile phone, wallet, these personal belongings were left, and it seemed that they were all taken away by the murderer.

Only one airlift cash box was left at the scene.

There is also such an unnamed female corpse that is so corrupt that it is difficult to identify the wound.

"No clothes of the deceased were found at the scene."

"Shotshot holes are again easily confused with maggot infestation."

"And the multiple comminuted fractures of the chest ribs..."

"It is indeed possible that it was caused by an unarmed blow."

"In this way, it is understandable for a misjudgment to occur."

As Lin Xinyi talked, he came to a little understanding of the colleague who misjudged the cause of death.

But he still has some dissatisfaction, because:

"The comminuted fractures caused by shotgun bombardment and the comminuted fractures caused by unarmed blows must have different fracture patterns in details."

"As long as you observe carefully and analyze patiently, it is not difficult to distinguish the two."

As he spoke, Lin Xinyi took out another close-up of the ribs of the deceased:

"These several comminuted fractures are not ordinary fractures, and the fractures are accompanied by some inconspicuous round-shaped bone defects."

"And this kind of circular fracture defect is the trace left on the bone when the lead shot passed through the human body."

"Observe carefully the size of the distribution area of ​​the shotgun lead pellets, combined with the fact that the projectiles did not remain in the human body, but all pierced through the chest and passed out from the back."

"It is not difficult to prove that the murderer shot at the chest of the deceased at a relatively close range."

"So the area where these lead shots diffuse and distribute is not too large."

"And the projectile itself has enough kinetic energy to penetrate the human body, piercing the back and flying out."

"I see…"

Police officer Jiang Gu followed the guidance and observed carefully, and sure enough, he found those small round bone defects from the fractures of the corpse.

He finally believed in Lin Xinyi's judgment.

But he still asked very puzzled:

"Since the deceased was killed by a shotgun, the bullet casings and projectiles left behind by the murderer should be found at the scene, right?"

"How could there be nothing?"

"this…"

Lin Xinyi thought for a while:

"The bullet casings should have been taken away by the murderer himself."

The murderer was so cautious that he even stripped off the deceased's clothes and took them away. Of course, he would not forget such important evidence as the bullet casing.

The shell of the shotgun itself is not small, and a shot can be as thick as a thumb.

Even if the shell is thrown on the ground, the gunman can easily find it from the ground, pick it up and take it away from the scene.

Of course... the shell casing is easy to take away, but the projectile is not necessarily.

There can be dozens of small lead pellets in a shotgun bullet.

So many small lead pellets were sprayed out, pierced through the human body and flew backwards for an unknown distance, and finally fell to the ground like rain and embedded in the soil——

It must be difficult for the murderer to find them one by one and take them away from the crime scene.

Theoretically, at least a few lead pellets should have been found at the scene of the crime.

But the problem is...

"It is difficult to find the murderer, and it is also difficult for the police to find them."

"And the Gunma County police are responsible for the on-site investigation. They..."

Lin Xinyi hesitated to speak, and finally saved a little face for his colleagues in these places for the sake of the relationship between the capital and the county and the harmony of the police circle:

"They also tried their best."

"It's understandable if you don't find it."