Coroner Coroner

"Who is so powerful?" Jiang Gu and Feng Jian Qiqi frowned.

Lin Xinyi was silent for a while, and replied:

"minor."

Chapter 365 Mathematical Case Solving

Minors, upon hearing this answer, both Furutani Rei and Kazami Yuya were silent.

This is indeed someone they can't afford to mess with.

If the murderer is a minor, even if he is caught, he cannot be punished as he should.

And Lin Xinyi was even more troubled than them:

Because he already knows that the Japanese law in 1996 stipulates that the age of absolute no criminal responsibility is 14 years older than the 2 years of criminal responsibility he knows.

Yes, Japan before 2000:

Minors under the age of 16 do not need to bear any criminal responsibility.

It was not until the "Kobe Children's Serial Killing Incident" in 1997 that aroused strong social repercussions that the Japanese Diet lowered the minimum applicable age of criminal responsibility from 2000 to 16 in 14.

In the "Kobe Children's Serial Killing Incident", the murderer "Juvenile A" who killed 2 people in a row and seriously injured 3 people used extremely cruel and bloody methods such as dismembering and mutilating the bodies of elementary school students.

Because he was only 14 years old when he committed the crime, he was released from the juvenile reformatory within 7 years after being arrested.

In 2015, the murderer "Youth A", who had already returned to society, wrote an autobiography based on his own experience, and it is said that he made a lot of money.

and so…

In the face of minors committing crimes, Lin Xinyi felt only powerless:

"16 years of criminal responsibility..."

"If my speculation is true, the biological age of the murderer will definitely be younger than 16 years old."

"That is, the only thing we can do..."

"It is to send him to a juvenile reformatory to help him reform himself and return to society in the future."

Lin Xinyi didn't know how effective the reformation of Japan's juvenile correctional schools was.

But think about it, the murderer "Boy A" has the face to publish his autobiography and eat human blood steamed buns after he grows up... The effect of this thought reform is very doubtful.

"Manager Lin..."

Kazami Yu also held a glimmer of hope, and asked self-deceivingly:

"Could the murderer really be a minor?"

"Could it be that you guessed wrong?"

"I also hope I'm wrong... But at present, the murderer is indeed a minor with a high probability."

Lin Xinyi replied with difficulty:

"First of all, the shoe size of the footprints left by the murderer on the lawn is small, which shows that his identity is likely to be a petite woman or a minor."

"Secondly, the murderer hit the deceased with a metal hammer twice in a row during the sneak attack, but only caused minor injuries to the deceased. This can prove to a certain extent that he was not strong enough, that he was a weak female, or an immature child. minor."

"Third, the murderer still chose to break in and attack while the lights were on in the house, which shows that he is very courageous, impulsive, and reckless, which is also in line with the psychological characteristics of a juvenile murderer."

"In the end, Chuang Dao went to prove that the murderer's action was to stab downwards, and when the murderer stabbed the deceased with a knife, he hit the upper right abdomen."

"And if it is an adult of normal height, raise the knife high, and then stab it downward..."

Lin Xinyi tried to raise the knife over his shoulder in front of Officer Kazami.

Since he was much taller than the average adult, if he stabbed face to face towards the target in this way, the blade would only hit the neck and shoulders.

If it were a shorter adult, it would only hit the chest.

"But what the murderer pierced was the lower abdomen."

"This shows that compared with the deceased Mr. Yamazaki, the murderer's height is much shorter."

"Mr. Yamazaki himself is not too tall. If the murderer is much shorter...then he can only be a minor."

Having said this, Lin Xinyi's expression turned ugly.

But he still left some hope for himself:

"Of course, because the positions of the two parties in the fight cannot be determined, it is not rigorous to judge the height of the murderer only from the position of the wound."

"So, I also got to do a more detailed and scientific investigation on the spot."

"If you're lucky...may be able to overthrow my idea."

"This..." Police officer Feng Jian was stunned for a while: "Then if the investigation finds out, the murderer is really a minor?"

"..." A moment of silence.

Jiang Gu Ling also cast his eyes on Lin Xinyi, as if he was expecting the police officer's answer.

"We're the police, we're law enforcement."

Lin Xinyi sighed with a desolate expression:

"Follow the law."

..............................

The personnel and equipment of the forensic class were quickly sent to the scene.

Lin Xinyi put on hair covers, shoe covers, masks, and protective clothing, and stepped into the scene cautiously.

And before he went deep into the living room area where the crime happened, he stopped at the entrance, pointed to the open villa security door and asked:

"Who opened the door of this villa?"

"I don't know." Officer Kazami shook his head: "This door was originally opened."

"When the police arrived at the scene in the early morning, the scene looked like this."

"This..." Lin Xinyi frowned slightly.

He didn't say anything, he just took a look at the undamaged anti-theft door, and then carried a big survey box and entered the villa.

Then, he was not too busy to investigate the scene carefully, but went straight into the blood-stained kitchen.

This is where the dead man was stabbed with the fatal knife.

Furutani Rei and Kazami Yu also followed curiously, they all wanted to see what kind of magic weapon was contained in the forest management officer's box.

then…

I saw Lin Xinyi took out a ruler, pencil, eraser, calculation paper, and a calculator.

"This..." The well-informed Mr. Jiang Gu couldn't understand: "Mr. Lin, you...are you doing a math problem?"

"Just do the math."

Lin Xinyi nodded seriously.

He pointed to the splattered blood on the wall next to the dead body and said:

"This is the splatter-like blood stain formed by the rupture of the human artery, and the splatter-like blood stain often indicates the first scene, that is, the starting position of the injury."

"If you find the splattered blood, you can probably find the location of the moment when the deceased was stabbed."

"The autopsy report mentioned that there were obvious mobile wounds inside the wound of the deceased, and the skin on the surface of the wound also had the characteristics of a sharp pull to the upper side."

"So it can be roughly judged that the moment the murderer drew the knife, the body of the deceased was still moving downward."

"That is to say, the murderer withdrew the knife immediately after stabbing it into the body of the deceased."

"And the blood in the deceased's body was sprayed out in large quantities at this time."

"So as long as we can confirm the height of the blood spatter point, we can indirectly confirm the body position of the deceased when he was hit by the knife, and thus determine the approximate height of the murderer."

"Eh..." Jiang Gu and Feng Jian were both at a loss when they heard this:

"The height of the blood spattering point... how can I confirm this?"

"By doing math problems."

As Lin Xinyi spoke, he took a ruler and carefully measured the length and width of those splattered blood droplets:

"Blood droplets form traces when they contact the object. If the surface of the object is smooth and flat, the shape of the bloodstain is either circular or oval."

"That is to say, the overall shape of the blood drip is oval."

"One side of the oval is smooth and is called the head."

"The other side forms a trail that resembles a small tail and is called the tail."

"According to the shape of the drop-shaped bloodstain, the angle at which the blood drop touches the object can be judged."

"The larger the distance between the long side and the broad side of the ellipse, the smaller the angle at which the blood drop contacts the object."

"Oh..." Jiang Gu Ling nodded thoughtfully: "So that's the case, I understand."

Kazami: "???"

What do you understand?

Why don't I understand?

He was still in a daze.

Jiang Gu Ling smiled lightly:

"Mr. Lin means that first measure the ratio of the short axis to the long axis of the ellipse, and then determine the incident angle corresponding to the ratio according to the sine function."

"Actually, it's just junior high school math."

"Kazemi, if you still remember the ballistic calculation method taught in the sniper class, you can easily understand this knowledge."

"Do you still use sniper rifles?"

Lin Xinyi interjected curiously.

"This is our police training course." Jiang Guling replied noncommittally.