Coroner Coroner

"The shooting...it's troublesome."

Lin Xinyi was very afraid of encountering a shooting case.

Not for anything else, but because he really lacks experience in handling shooting cases.

Although I have learned all the necessary knowledge in the class, this is a career that emphasizes practice and more theory.

If there is too little practical experience, theory often cannot play its due role.

When dealing with the Seba Zunde murder case last time, Lin Xinyi only relied on trace detection technology to solve the case, and failed to find any valuable clues from the corpse itself.

But this is also impossible...

Whoever makes the domestic law and order too good, he wants to accumulate experience in handling shooting cases, but he has no chance.

And I have to admit that in this professional field, the Lighthouse Country is the strongest.

He has a high academic level, rich practical experience, and leads the world in the forensic research of gun bullets, which is not comparable to those backward countries that even have few shooting cases.

"Forget it... first check the corpse form according to the procedure."

Lin Xinyi sighed lightly, took Asai Naomi with him, and began the autopsy according to the procedure.

While silently memorizing the steps of Lin Shinichi's autopsy, Asai Narumi asked curiously:

"Why is there a bullet hole in the glass window where the deceased was leaning on?"

"The glass window is hit by a bullet, won't it shatter?"

"Will not."

Lin Xinyi replied casually:

"You think the glass will shatter if it is hit by a bullet. It should be because you watch too much TV."

"In fact, the speed of the bullet is extremely fast and the kinetic energy is relatively large, but the contact area between the bullet and the glass is very small, so the pressure is very high."

"So, when the bullet hits the glass, it tends to drill a small hole rather than shatter the glass."

"Especially this case..."

"The pistol bullets used by the murderer are so powerful that they can go through the brain first, and then go through the glass window."

Lin Xinyi pointed to the splattered blood on the glass window and said:

"Blood splatters are the best clue to the exact location of the deceased when they were injured."

"Look, this splattered bloodstain is distributed in a circular shape around the bullet hole on the glass window."

"Through this, it is almost certain that the deceased was standing in front of the glass window when he was shot."

"The bullet first penetrated the brain of the deceased from the forehead, and then shot from the back of the head, penetrating the glass window."

"Blood spewed out from the ejection port in the back of the head along with the bullet, leaving such splattered blood stains on the glass window."

"oh, I understand now."

Naruto Asai nodded thoughtfully.

At this time, Mao Lilan, who was in charge of the on-site investigation, seemed to have discovered something.

She held four transparent evidence bags containing one bullet casing each, and said to Lin Xinyi:

"Mr. Lin Xinyi."

"I found three bullet holes in the wall next to the window and four bullet casings in the corner."

"With the addition of a shot in the head of the deceased, the number of bullet holes and shell casings matched."

"So I think…"

Mao Lilan carefully expressed her inference:

"The murderer should have called Mr. Suwa to this room by phone."

"Then, he pulled out a pistol with a suppressor, and Mr. Suwa backed away to the window in fright."

"The murderer opened fire, chasing and killing Mr. Suwa who was fleeing in the room."

"Three of the bullets missed the wall, and one bullet hit Mr. Suwa's forehead, and then flew out through the glass."

"It seems that this murderer's marksmanship should not be very good, and he was quite agitated when he shot."

Lin Xinyi remained silent and did not express his opinion in a hurry.

In fact, although Mao Lilan's reasoning is simple, it can indeed explain the situation discovered now.

Next, let Caesar smell the smell of the scene, especially the smell of the pistol left at the scene, maybe the suspect can be found.

And as long as the identified suspect is confirmed to have the time and motive of committing the crime, and he is locked down for investigation, the case will almost be solved.

But... is it really that simple?

"I always feel that something is wrong."

Lin Xinyi frowned tightly, and turned his gaze back to the bullet hole on the forehead of the corpse.

Recalling the bullet creation knowledge that he rarely used after he finished his studies, he suddenly realized something:

"No, this bullet hole seems too 'elliptical'."

"What do you mean?"

Mao Lilan was taken aback for a moment, and Asai Narumi also cast a puzzled look.

"If the bullet enters the human body vertically, the entrance should be a perfect circle."

"If the bullet is fired into the body at an angle, the injection port will form a quasi-elliptical skin defect."

"The sharper the angle of incidence, the more 'flat' the ellipse-like shape formed."

"And this oval-shaped skin defect on the forehead of the deceased...is not an ordinary 'flat'."

"This shows that the angle of incidence is very sharp—the shooting angle of the murderer seems to be a bit special."

Lin Xinyi thought for a while, and said to Asai Narumi:

"Bring a ruler and measure the horizontal and vertical lengths of the bullet holes in the corpse."

"I'm going to calculate the angle of incidence."

Chapter 161 Shooting Angle

"Calculate the angle of incidence?"

Shigemi Asai and Mo Lilan looked at each other, both looking a little confused.

They are not wondering how to calculate the angle of incidence, but wondering:

"Does this still need to be calculated?"

"The gunshot wound on the deceased's head was a penetrating wound, with two bullet holes at the entrance and exit."

"As long as the entrance and exit are connected, can't we determine the trajectory of the bullet and the angle of the bullet?"

Two points confirm a straight line, which is a very simple truth.

And since the trajectory of the bullet when it passes through the human body can be confirmed, it is only necessary to simply measure the angle between this line and the surface of the human body to estimate the angle of entry of the bullet.

With this in mind, they raised doubts in their hearts, and unconsciously approached the corpse to observe the wound on the head of the corpse:

"The bullet hole in the forehead is the entry point."

"The bullet hole in the back of the head is the exit."

"Is that right?"

Before estimating the angle of incidence, Mao Lilan and Asai Chengshi asked Lin Xinyi with some uncertainty.

One of them is an apprentice who has just started, and the other is a forensic doctor who has just changed his profession. They are still not good at wound examination, especially the rare bullet wounds.

Now the entrance and exit of the injection can be judged, mainly based on the splattered blood on the glass window behind the deceased, and indirectly confirmed through spatial restoration of imagination.

"En." Lin Xin nodded, affirming it from the perspective of the characteristics of the wound:

"The injection port is a wound formed by the bullet hitting, squeezing, and shearing the skin. It is generally similar to or slightly smaller in diameter than the bullet head, and is accompanied by a skin defect in the center of the wound. The edge of the defect presents skin inward, making the entire wound resemble a vortex funnel. .”

"The injection port is the wound caused by the bullet passing through the skin tissue. The diameter of the injection port is generally larger than that of the injection port, and the wound is accompanied by skin tearing."

"The trauma characteristics of the two are relatively easy to distinguish, and there is no mistake."

He gave an affirmative answer.

Then, without waiting for Mao Lilan and Asai Naomi to continue to ask questions, Lin Xinyi said:

"I know what you mean."

"Light viewed from the position of the entrance and exit:"

"The ejaculation port on the forehead is only slightly higher than the ejaculation port on the back of the head."

"If you simply connect two points into a straight line, and use this method to confirm 'Chuang Dao', the estimated shooting angle... um..."

Lin Xinyi didn't measure it, he just estimated it casually through visual inspection:

"About 7, 80 degrees, it's a relatively obtuse angle."

"Yes."

Asai Chengshi nodded and expressed his thoughts:

"Since the bullet was shot from high to low, at a relatively blunt angle, it shot into the brain of the deceased."

"Then as long as the murderer is tall enough and holds the gun slightly higher than the head of the deceased, such trauma can be formed."

As he said that, Asai Chengmi also imitated the appearance of the victim based on his imagination.

He pretended to be forced to the wall by the murderer, leaning his back against the wall and slightly bent his knees to lower his height appropriately.

And Mao Lilan, who stepped on a pair of high heels and had an advantage in height, walked up to Asai in a tacit understanding, and played the role of the murderer in cooperation.

She held up a "pistol" that didn't exist at all, condescendingly, and aimed the "gun muzzle" at Asai Chengmi's forehead.

"Crack~!"