Regarding human bones, Lu Chuan studied them when he was in college.

But just to do a general understanding.

This discipline is a compulsory subject for forensic medicine, and the current investigation is only for a general understanding.

And this time, the information rewarded by the system gave Lu Chuan a deep understanding of the structure and characteristics of human bones.

For example, the number of bones.

There are 206 bones in a normal adult, but what about children?

The number of bones in children varies between 217 and 218, and there is a difference between the skull and the sacrum.

A child's skull and sacrum will gradually merge as they grow, growing from multiple pieces to pieces.

Even, some have differences in finger bones.

This has something to do with the mechanism by which the human body grows taller.

Between the bones of a child's limbs, there is a brittle bone in each joint.

This is key to bone growth, but as we age, brittle bones slowly become smaller until they disappear.

At this time, the height will also stop growing.

However, there are also some people whose brittle bones do not disappear, but calcify into ordinary bones.

That's the equivalent of an extra bone.

There is even a saying that in medicine, the difference between children and adults is as great as the difference between humans and chimpanzees.

Even, from a medical point of view, the two are not the same species.

In the analysis of bones, it is not only the number of bones that is concerned.

The time of formation and the rate of ossification of different bones under different conditions are different.

How to judge the physical characteristics of the deceased, the cause of death, etc., according to the hardness, bone density, and surface roughness of the bones.

All of them are abilities in the intermediate bone identification and analysis skills.

It can be said that Lu Chuan, who has obtained the intermediate bone identification analysis, is already a forensic doctor to a certain extent.

Of course, there are many branches of forensic medicine.

Such as forensic pathology, forensic clinical, forensic toxicology, etc.

There is even forensic entomology.

Normal people basically don't understand this, how can forensics have a branch of entomology.

This relates to the question of determining the time of death of the corpse.

Generally speaking, the time of death of a corpse can be judged by the degree of stiffness and the color of the corpse spots.

However, this is not accurate and can only be used for on-the-spot ad-hoc judgments.

The time of death of the corpse should be judged by the forensic doctor based on the surface condition of the corpse, and after the autopsy, it should be judged according to the temperature of the internal organs, the degree of decay, and the degree of blood clotting.

But highly decomposed corpses, corpse morture has disappeared, corpse spots have dissipated, and even venous decay has appeared.

At this time, only the approximate number of days of death of the corpse can be judged through the corpse table, but the exact time cannot be obtained.

Forensic entomology comes in handy.

After the human body decays, the body nourishes various bacteria, slowly produces maggots, and even hatches into corpse flies.

Forensic entomology can accurately determine the time of death by studying the growth cycle of insects in corpses.

Bone identification and analysis is a very remote discipline and is often included in forensic anthropology.

Thinking of this, a figure flashed in Lu Chuan's mind.

Yesterday, when the deceased's fingerprints were collected in the forensic autopsy room, he said that he would invite Senior Sister Shen Yan to dinner tonight.

Whether it is forensic medicine or on-site investigation, basically what is done is preliminary work.

Regardless of whether the case is solved or not, the work pressure of these two cannot be said to be small, but compared with ordinary criminal police, it is still a little easier.

After all, it's really busy, and an all-nighter is pretty much it.

It's like an oiran and an ordinary girl, although the essence of the work is the same, but this treatment, the degree of pretense is different.

However, before the appointment, Lu Chuan had to go home to make up for sleep.

Yesterday I stayed up all night and was a little tired.

As for the follow-up of the case, the person has already been arrested, and all that remains is to fix the evidence and sort out the materials.

In Wang Song's case, there is a high probability that the death penalty will be required.

Therefore, every detail of the case must be particularly meticulous.

Lu Chuan has not been in the police for a long time, but he has also experienced the review of death penalty cases.

After the murder of Zhang Wen was solved, 50 or 60 people from three or four units came and talked to all the criminal policemen who were handling the case.

Lu Chuan, as the criminal police officer who provides important clues, is naturally among them, and he is the focus of attention.

At that time, seven or eight waves of people bombed the landing river for a day.

Lu Chuan has a headache when he thinks about it now.

However, this is also a normal process.

In the review of death penalty cases, all those involved are held responsible.

If the problem is not found out and rectified in the process, then if it is discovered when it is reviewed ten years later, it may not be as simple as interrogation.

All personnel in the entire chain must be punished, and even more serious punishments will be imposed.

swept a shared bicycle, and Lu Chuan left the criminal investigation detachment leisurely.

Lu Chuan left here, Yang Sen and Lao Bai also went back, but Liu Guodong was still boiling.

There's no way, he's the person in charge of the field survey office, and he has to go to meetings or anything.

Lu Chuan wants to replace him, but his qualifications are not enough.

As for the current survey report, it was already done in the early hours of the morning.

This case, compared with Zhang Wen's murder, actually has more details exposed.

Sun Jun of the first group of operations and Ren Qiang of the second group have actually found some clues.

The murderer Wang Song was also within the scope of key observations.

It's just that Lu Chuan's footprints and fingerprints extracted from the electric car completely locked Wang Song.

With these two ironclad evidences, Wang Song has no room for quibble.

In fact, it is true, after seeing his fingerprints, Wang Song completely collapsed.

What he couldn't understand was that the car had been soaked in water for three days, how could he still find his fingerprints?

4:20 p.m.

Lu Chuan came to the criminal investigation detachment again.

After sending a WeChat message to Shen Yan, the other party replied in seconds.

"Detective Lu wants to have a treat, he must give face, where to go?"

"Senior sister, don't make fun of me, what does senior sister want to eat at night?"

Lu Chuan really didn't feel that he had any gods.

Without a system, he is just an ordinary graduate.

At most, graduates who have a lifetime of memories and are reborn.

"At the case summary meeting this afternoon, Team Qin praised you greatly."

"Oh...... I really don't know this, but I went home to catch up on my sleep during the day......"

Shen Yan posted a sour emoji: "Murder...... That's why you dare to go back to sleep now......"

Lu Chuan didn't think there was anything wrong, the work was done, if he didn't go home to make up for sleep, what was the use of grinding foreign workers in the unit.

"Senior sister, what do you want to eat at night, it's almost time to get off work, let's go!"

"Don't call me senior sister, I feel like I'm old, just call me Shen Yan......"

"As for the food...... I heard Chen Lu from the agency say that Youyi Road has opened a new health hot pot, let's try it? ”

Lu Chuan made an OK gesture.

The hot pot is good, the beauty can eat vegetables, and he can eat meat.