When a homicide occurs, the police at the place where the crime occurred will devote all their police resources to solving the case.

What's more, seven corpses were poured inside the piers.

Li Donglin of the Second Criminal Investigation Department of the Provincial Department was personally in charge, and the QZ City Criminal Investigation Detachment, the major subordinate criminal police brigades, and the police stations were all working around this case.

Any clue will be followed up in the shortest possible time.

Although Lu Chuan was in the rear, he could also feel the tension on the front line.

Because in less than three hours, the identity information of the sixth corpse was fed back to the rear.

"Designer?"

The owner of the No. 6 corpse is named Wang Xiaobo, an engineering designer.

However, unlike ordinary designers, Wang Xiaobo studies intelligent robots.

"Li, they are already investigating, and the company where Wang Xiaobo worked back then had relatively cutting-edge technology."

Zhang Yuanchao looked at the relevant information and explained to Lu Chuan.

Based on the results of the current investigation, this appears to be an ordinary case of commercial espionage.

But the company where Wang Xiaobo works is just an ordinary civilian company.

According to the data, there are only some relatively high-end programming designs in drone control.

Speaking of secrets, there are some, after all, they are trade secrets.

But it seems that it is not enough to say that human lives are all needed.

Lu Chuan had heard many similar cases when he was in college.

Most commercial espionage cases are bribed with money, and they are usually cases of economic investigation detachments.

There are not many cases involving homicides.

Shaking his head, Lu Chuan continued to do his job.

There is a division of labor to solve the case, and Lu Chuan's battlefield is in the rear.

Seven skeletons, so far, four have been identified one after another.

Investigations around their relationships are also moving forward at a rapid pace.

Lu Chuan continued to identify and analyze the bones.

Bone identification and analysis is actually an important branch of human remains identification and analysis.

The identification and analysis of human remains does not mean that it must be carried out only on dead people.

Disability assessment for living people is actually part of it.

"This time, I'm going to talk about the sex determination of the bones."

Lu Chuan is operating, and Zhang Yuanchao is explaining.

Most of the students who followed Zhang Yuanchao this time were young forensic doctors with rich theoretical knowledge but relatively lack of on-site practical experience.

It's not uncommon to come across seven skeletons in one case.

In general, very few forensic doctors have experience in identifying bones.

Some of them can meet in one year, and some of them may not even meet together for three or five years.

There were two skeletons in Zhang Yuanchao's studio, but they were donated by the hospital.

The bones were almost pulped by these forensic doctors, and the familiar ones could not be familiar, and after a long time of touching, the condition of the bones, especially the surface, had changed a lot.

Where is it like now, this is the first scene of the crime.

The bones that have been sealed in the concrete pier for fifteen years are the best teaching tools.

If these bones can be analyzed thoroughly, these students will almost be out of school.

After the baptism of two or three cases in the future, the level can be well improved and consolidated.

Lu Chuan is now measuring the pelvic size of a skeleton.

"The shape of the pelvis is the most accurate and important basis for determining the sex of the bones."

"The male pelvis is narrow and tall, and the female pelvis is wide and short......

"The pelvis of this corpse, let's come and see, is it a man or a woman?"

Several forensic doctors stepped forward and could tell at a glance, "Male."

For this kind of basic judgment, Zhang Yuanchao is not even interested in giving affirmation.

The shape of the pelvis of men and women is quite different, not to mention the doctor, that is

Ordinary people, as long as their eyes are normal, can tell the difference.

The point is, not all skeleton cases will get complete bones.

Furthermore, the difference of the pelvis is not tight or wide distinction tightly, either.

How do you determine gender if there is only a small part of the pelvis?

"In most bone cases, the proportion of corpse mutilation cases is larger, so if the bones are not found intact, they have to be judged by other methods."

Zhang Yuanchao began to give examples: "For example, the bone density of the pelvis in men should be high, and in women, it should be low."

Bone density is relatively easy to measure, and the general criminal investigation detachment has instruments to measure bone density.

Of course, most of the time there aren't that many bones to be examined.

This instrument is not idle, and many criminal police officers usually ask forensic doctors to measure their bone density for free.

In this way, there is no need to take a test during the physical examination.

The money saved can be used for other projects.

Recently, the provincial government has implemented a package medical examination for police officers throughout the province, that is, according to different ages, the cost of medical examination varies for each person.

You can freely choose and match according to your physical condition, according to the items in the medical examination menu.

Except for some necessary height, weight, eyesight, etc., the others are supermarket options.

One less bone density, one more can be chosen.

"The obturator foramen of the pelvis is oval in men and triangular in women."

"The ischial tuberosity is varus in males and varus in females."

"The sacrum is long and narrow in men, and short and wide in women......

Every time Zhang Yuanchao introduced a part, Lu Chuan would point out the location of the different points and show it to everyone.

"Oh, this corpse is a woman......

"Elder Zhang, if the pelvis is not found, the other bones can also identify the gender, right?"

Zhang Yuanchao nodded, of course, this can also be judged.

"When you were in school, you should have learned that the most reliable way to determine the sex of a skeleton is by the shape of the pelvis."

This is determined by the different physiology of men and women.

A woman's pelvic shape is the most conducive to fertility.

The shape of the male pelvis is conducive to the conduction of strength.

"Another part of the skull that determines the sex of the skeleton is the skull, and generally speaking, the male skull is thicker, the surface is rougher, and the bone density is higher."

"But there are some special women, girls and men, who say that although they are women, their appearance is biased towards men."

"There are also some special men, male and female, feminine in appearance, small in skeleton, biased towards women."

Zhang Yuanchao walked to Lu Chuan's side and picked up the skull of the No. 7 skeleton.

"However, the angle of the jaw of the skull is regular, less than 125 degrees, which is male."

"In addition, judging the gender should be combined with bone fragments, vertebrae, sternum, etc."

During the teaching process, Zhang Yuanchao would ask Lu Chuan to scramble the bones, and then let the students comprehensively determine the gender of the bone owner based on the only bones.

Lu Chuan often feels that when solving a case, time always flies quickly.

In the forensic laboratory, the identification and analysis reports of the seven skeletons have been issued.

Zhang Yuanchao's teaching activities for the young forensic doctors who came with him also came to an end for the time being.

And the investigation and handling of cases on the front line have also made great progress.