wavenovel Chapter 1274 Accurate to People
Chapter 1274 Accurate to People
Chapter 1274 Accurate to People
What use would a skull have without the front of the skull but only with the sides and top of the skull?
Of course, it is extremely useful. For example, if the side and top of the skull are restored and it is found that the head is flat, wouldn't that reduce the birthplace and native place of the deceased?
Similarly, when analyzing a skull in Malaysia, even if the front of the skull is severely damaged, the bones on the other three sides and the remaining bones on the front of the skull can be used to distinguish race first.
The main ethnic groups in Malaysia are Malays, Chinese and Indians, with a small number of indigenous peoples.
In terms of skull morphology alone, Malays have the lowest cranial top, followed by Chinese, Indians have the highest, and the aborigines have a low and flat cranial top. The eye sockets are also different, Malays have round eye sockets with blunt and thick rims; Chinese have square eye sockets with sharp rims, and Indians have round eye sockets with sharp upper rims...
All these things, including cheekbones, brow ridges, teeth, etc., have statistical differences among different races. These are difficult for the murderer to damage by hitting them, but some are easy to damage and some are not.
For example, in terms of teeth, the Chinese have a higher rate of tooth decay, and the Malays have even greater buccal decay because of eating betel nuts...
All in all, to a forensic anthropologist, a person's life will eventually be condensed in his bones.
Not everyone can write a diary, but everyone's bones are his diary.
Jiang Yuan looked at each bone one by one, making some notes from time to time, but was not in a hurry to draw a conclusion.
If there is only one piece and a small amount of bones, then the conclusion given will have more prefixes such as "or", "maybe", and "possibly".
Of course, a complete set of bones may be available, but in order to obtain accurate conclusions, it is often necessary for the owner of the bones to cooperate well before his death, do things that only a few people do, get diseases that only a few people get, and suffer injuries that only a few people suffer... It takes a lot of effort to speak after death and, through forensic anthropologists, tell stories that only a few people can tell.
Otherwise, even if a complete set of bones is left, it will be nothing more than the bones of a mediocre person.
Jacob and others quickly fished out all the bones in the pot, cleaned them up, placed them on the dissecting table, and thoughtfully arranged them in order according to anatomical standards to make it easier for Jiang Yuan to view them.
Then, Jacob looked at Jiang Yuan eagerly, waiting for him to be of use again.
To be honest, Jacob is also a forensic doctor with a very high technical level. His main technical level in forensic pathology and other fields is at least at the mid-level LV3.
But he had no chance to learn forensic anthropology, a golden technology, when he was young, and even less chance when he was middle-aged. At the very least, other forensic doctors in China would not teach him, and he was too embarrassed to learn from them.
Jiang Yuan's forensic anthropology, which clearly exceeds the level of ordinary experts, is almost the top-notch one that Jacob can access.
Jacob hopes to follow Jiang Yuan, study his work carefully, and achieve something.
At this time, Jiang Yuan put down the bone in his hand, turned around and asked, "What did the DNA report say? Is it a mixed race of Chinese and Malay?"
"Yes, hey, can you tell from all this?" Jacob was still fantasizing in his mind whether Jiang Yuan would take out a bone and describe what kind of occupational strain or metabolic disease the deceased had suffered before his death, but he heard the judgment of a mixed-blood at the beginning.
This is much more difficult than judging a single race. Because judging a single race is supported by basic research, and for example, ethnic groups such as Chinese and Malays, which are likely to only exist in Malaysia, it is not something that a Chinese forensic doctor should be able to tell. It is better for a local Malaysian forensic expert to tell.
Jiang Yuan only hummed, and said: "The deceased's nasal root point is medium to low, and the width of the piriform aperture is between that of Chinese women and Malays. In addition, the pelvic inferior angle is 95 degrees, and the sacrum shape tends to be short and wide like the Malay type, but the sciatic notch is close to the Chinese... According to preliminary judgment, the East Asian Han genes account for about 60%, and the Malay genes account for about 40%, so he should be a local Malaysian, not a first-generation mixed-blood."
Jacob turned around and silently took out the DNA identification report. He quickly turned to the racial identification column, then looked up at Jiang Yuan and suddenly felt a little sorry for him.
If it were 20 years ago, when DNA technology was still immature, Jiang Yuan's ability to judge race alone would have made him a multi-racial force in the United States. Why would he be simply called "God Jiang"?
"Biological aspects. Female, 35 years old, 162 cm tall, no pelvic deformity, no reproductive history. Old fracture of the right clavicle that healed about 6 years ago."
Jiang Yuan didn't look at other bones and started output directly.
Jacob and the forensic doctor next to him quickly turned on the recorder and started recording at the same time.
Jiang Yuan waited for them for a while, then continued: "The deceased's lower limb bones have stress changes, with thick bone hyperplasia on the posterior side of the femur and increased roughness of the bone surface. The articular surface of the talus has asymmetrical wear. In addition, the knee joint is seriously damaged, and the meniscus is severely worn, indicating long-term meniscus damage and secondary osteoarthritis. There is also bone hyperplasia on the L4 transverse process of the lumbar vertebra..."
Jiang Yuan spoke a lot of technical terms in one breath, making Jacob and other forensic doctors' wrists stiff.
"What conclusions can be drawn from the above?" Jiang Yuan finished speaking and asked subconsciously, just like he did in China.
Jacob didn't think there was anything wrong with it at all, and said lightly: "A large number of sports injuries means that the victim likes sports?"
The forensic doctor beside him added: "And it's not just a casual sports hobby. He must have been training for a long time, at least at the level of a senior enthusiast."
"What sport?" Jiang Yuan then continued to ask.
Jacob hesitated for a moment and said, "The thick bone hyperplasia on the posterior side of the femur, as well as knee joint and lumbar spine lesions... Bicycle? Cycling?"
"If it comes to this extent when riding a bicycle, there will usually be ischial tuberosity periostitis." Jiang Yuan denied it without even thinking.
Jacob was stunned and quickly made a note.
At this point, it is a bit like an internal medicine diagnosis.
You know the symptoms, and you want to infer the cause. It seems that there are some matching items, but in fact, the current case is not the question written on the test paper. A real skeleton will have many appearances, and considering these appearances comprehensively is often not a simple combination question.
Some appearances are even just distractions.
For Jacob and others, they have been working in forensic anthropology for many years. What they use in daily life is mainly to determine gender, height, and look for obvious medical traces.
Judging occupation or hobby based on changes in bone stress is like a Level 2 forensic anthropology exam question. The question itself is enough to stump them.
Just like what Jiang Yuan said, "The thick bone on the posterior side of the femur proliferates and the roughness of the bone surface increases." This sentence itself is not simple.
There are many reasons for the increase in the roughness of bone surfaces. After a person is boiled and boned, some rough bone surfaces can always be found on the body. The problem is how rough is considered rough. The roughness of bones in different locations and even in people of different races is different. We also need to rule out some internal diseases.
On the other hand, the roughness of most bone surfaces is meaningless, but Jiang Yuan specifically mentioned it in conjunction with the "thick bone hyperplasia on the posterior side of the femur". This alone shows that Jiang Yuan already has a direction - Jacob has no idea in this regard at all.
Jiang Yuan didn't really want Jacob to answer. He saw that a few people were interested, so he guided them to think along the way. If they were interested, they could follow Jiang Yuan's thoughts and go back to think and make up for the lessons. If they were not interested, it would just be a process of asking and answering questions by themselves.
Jiang Yuan then took out the bones he had just found and placed them separately. He then said, "I think the deceased must have been skiing for a long time, and his training intensity was quite high for a period of time. Of course, it's normal for you to be unfamiliar with skiing in Malaysia."
Jacob's blank expression flashed across his face, and he quickly replied: "If it is a long-term training and senior enthusiast, the local ski resorts in Malaysia should not be able to meet this demand. Does it mean that the deceased grew up abroad, or often traveled between Malaysia and some ski areas?"
Jiang Yuan said: "Judging from the condition of her bones, she must have skied for a long time after she became an adult. At least she was skiing a few years before her death. By the way, the old fracture of her clavicle was probably caused by skiing."
Jacob exclaimed, "That is to say, she is a woman who often travels abroad, and her destination is often ski areas. This means her family conditions are also very good. In addition, she is of Malay and Chinese descent, 35 years old, 162 cm tall, has no history of childbearing, and had a serious fracture 6 years ago... I think I can pinpoint the person!"