Chapter 205: Skeleton Identification Teaching
When a murder occurs, the police at the place where the crime occurred will use all their police resources to solve the case.
What's more, seven corpses were poured into the bridge pier.
Li Donglin of the Second Criminal Investigation Division of the Provincial Department is personally in charge. The QZ City Criminal Investigation Detachment, the subordinate criminal police brigades, and the police station are all working on this case.
Any clue will be followed up as soon as possible.
Although Lu Chuan was at the rear, he could still feel the tension on the front line.
Because in less than three hours, the identity information of corpse No. 6 was fed back to the rear.
“Designer?”
The owner of corpse No. 6 is Wang Xiaobo, an engineering designer.
However, unlike ordinary designers, Wang Xiaobo studies intelligent robots.
"Chief Li, they are already investigating. The company Wang Xiaobo worked for back then had relatively cutting-edge technology."
Zhang Yuanchao looked at the relevant information and explained to Lu Chuan in a chat.
Based on the current investigation results, this seems to be an ordinary industrial espionage case.
But the company Wang Xiaobo works for is just an ordinary civilian company.
According to the data, there are only some relatively high-end program designs in drone control.
When it comes to secrets, there are some. After all, they are business secrets.
But it seems that it does not reach this level when it comes to killing people.
Lu Chuan heard many similar cases when he was in college.
Most commercial espionage cases are bribed with money, and they are usually cases of the Economic Investigation Detachment.
Not many are involved in murder cases.
Shaking his head, Lu Chuan continued to do his work.
There is a division of labor in solving crimes, and Lu Chuan’s battlefield is at the rear.
There are seven skeletons, and so far, the identities of four people have been confirmed.
Investigations surrounding their interpersonal relationships are also advancing rapidly.
Lu Chuan continued to conduct identification and analysis on the skeleton.
Skeleton identification and analysis is actually an important branch of identification and analysis of human remains.
Identification and analysis of human remains does not mean that it must only be done on dead people.
The disability assessment of living people is actually part of it.
“This time I will mainly tell you about the gender identification of skeletons.”
Lu Chuan is operating and Zhang Yuanchao is explaining.
Most of the students who came with Zhang Yuanchao this time were young forensic doctors who had rich theoretical knowledge but relatively little practical experience in the field.
It is not common to encounter seven skeletons in one case.
Generally speaking, very few forensic doctors can accumulate experience in skeletal identification.
Some people can meet each other in one year, and some may not even meet each other in three or five years.
There are two skeletons in Zhang Yuanchao’s studio, but they were donated by the hospital.
The bones were almost swollen after being examined by these forensic doctors. They were familiar and could not be more familiar. Moreover, after a long period 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.
Fifteen years of skeletons have been sealed in the concrete piers. Each skeleton is the best teaching tool.
After thoroughly analyzing these skeletons, these students are almost done.
In the future, after undergoing the baptism of two or three cases, the level will be greatly improved and consolidated.
Lu Chuan is currently measuring the size of a skeleton's pelvis.
“The shape of the pelvis is the most accurate and important basis for identifying the gender of a skeleton.”
“The male pelvis is narrow and tall, while the female pelvis is wide and short...”
"Come over and take a look at the pelvis of this corpse. Is it male or female?" Several forensic doctors came forward and could tell at a glance: "Male."
Zhang Yuanchao was not even interested in affirming this basic judgment.
The shape of the pelvis between men and women is quite different. Let alone forensic doctors, ordinary people can tell the difference as long as their eyesight is normal.
The key is that not all skeleton cases will result in complete skeletons.
Moreover, the difference between the pelvis is not necessarily narrow or wide.
How to determine gender if there is only a small part of the pelvis?
"In most skeleton cases, the proportion of mutilated corpses is larger, so if the skeletons found are not complete, other methods must be used to judge."
Zhang Yuanchao began to give examples: "For example, the male pelvis Bone density should be higher, and that of women should be lower. ”
Bone density is relatively easy to measure, and most criminal investigation teams have instruments for measuring bone density.
Of course, most of the time there are not that many skeletons for people to test.
This instrument is not idle. Usually, many criminal police officers will ask forensic doctors to test their bone density for free.
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 department has implemented a packaged physical examination for police officers across the province, which means that the physical examination fee for each person is different according to age.
Everyone can freely choose and match the items in the physical examination menu according to their own physical condition.
Except for some necessary height, weight, eyesight, etc., everything else is a supermarket choice.
If you lose one bone density, you can choose another one.
“The obturator foramen of the male pelvis is oval and female is triangular.”
“The ischial tuberosity is inverted in males and everted in females.”
“Sacrum in males Narrow and long, women are short and wide..."
Every time Zhang Yuanchao introduces a part, Lu Chuan will point out the location of different points for everyone to watch.
"Oh, this corpse is a female..."
"Mr. Zhang, if the pelvis is not found, can other bones be used to identify the gender?"
Zhang Yuanchao nodded, of course this can also be done judge.
“When you were in school, you should have learned that the most reliable way to judge the gender of a skeleton is based on the shape of the pelvis.”
This is determined by the different physiological structures of men and women.
The female pelvic shape is the most conducive to fertility.
The shape of the male pelvis is conducive to the conduction of force.
“Another part that can be used to determine the gender of a skeleton is the skull. Generally speaking, male skulls are thicker, with a rougher surface and higher bone density.”
“But there are some special females, A girl with a masculine face means that although she is a woman, her appearance is more like that of a man. ”
“There are also some special men with a masculine face that are feminine in appearance, small in frame, and biased toward women.”
< br>
Zhang Yuanchao walked to Lu Chuan and picked up the skull of Skeleton No. 7.
“However, the mandibular angle of the skull is regular. If it is less than 125 degrees, it is a male.”
“In addition, determining the gender must also combine bone fragments, vertebrae, sternum, etc.”
During the teaching process, Zhang Yuanchao asked Lu Chuan to disrupt the bones, and then asked the students to comprehensively determine the gender of the owner of the bones based on the only few bones.
Lu Chuan often feels that time always flies by when solving a case.
The forensic laboratory has issued identification and analysis reports for the seven skeletons.
Zhang Yuanchao’s teaching activities for the young forensic doctors who came with him have also come to an end for the time being.
The frontline case investigation has also made great progress.
(End of this chapter)