Chapter 1260: Precise to the Person

A skull without the front part, only the sides and the top—what use could it have?

Naturally, it was extremely useful. For example, if you restored the sides and top of the skull and found it was a flat head, wouldn't that narrow down the deceased's birthplace and ancestral home?

Similarly, analyzing a skull in the Malaysian region, even if the front of the skull was severely damaged, the bones on the other three sides, as well as the remaining bones on the front of the skull, could first be used to distinguish race.

The main ethnic groups in the Malaysian region are Malays, Chinese, and Indians, as well as a small number of indigenous people.

Just in terms of skull morphology, the Malay skull top is the lowest, the Chinese is second, the Indian is the highest, and the indigenous is low and flat. The eye sockets are also different. The Malay eye sockets are round, and the orbital margins are blunt and thick; the Chinese eye sockets are square-round, and the orbital margins are sharper; the Indian eye sockets are round, and the upper orbital margins are sharp...

All kinds of things, including cheekbones, brow ridges, teeth, etc., have statistical differences among different races. These are things that are not easy to destroy in the murderer's beating, but some are easy to use and some are not.

For example, in terms of teeth, the caries rate of Chinese teeth is high, and the buccal surface wear of Malays is greater because they eat betel nut...

In short, for a forensic anthropologist, a person's life will eventually be condensed into his bones.

Not everyone writes a diary, but everyone's bones are his diary.

Jiang Yuan looked at the bones one by one, occasionally making some records, and didn't rush to give a conclusion.

If there were only a few pieces and a small amount of bones, then the conclusion given would have more prefixes like "or," "maybe," "possibly."

Of course, a full set of bones might also have them. To obtain precise conclusions, it often requires the owner of the bones to be very cooperative during his lifetime, doing things that few people do, getting diseases that few people get, suffering injuries that few people suffer... It requires a lot of effort to speak after death and borrow the forensic anthropologist to tell stories that few people can tell.

Otherwise, even if a full set of bones is left, it is nothing more than a pair of mediocre bones.

Jacob and others quickly scooped out the bones in the pot, cleaned them up, placed them on the autopsy table, and thoughtfully arranged them in order according to the standards of anatomy to facilitate Jiang Yuan's viewing.

Then, Jacob looked at Jiang Yuan with eager eyes, waiting for anything he could help with.

To be honest, Jacob was also a forensic doctor with a very high technical level, and his main technical levels such as forensic pathology were at least at the LV3 middle stage.

But golden-level techniques like forensic anthropology, he didn't have the opportunity to learn when he was young, and he had even fewer opportunities when he reached middle age. At the very least, other forensic doctors in the country wouldn't teach him, and he was embarrassed to follow and learn.

And Jiang Yuan's forensic anthropology, which was obviously beyond the level of ordinary experts, was almost the top level that Jacob could contact.

Jacob hoped to follow Jiang Yuan and study his work well, so that he could achieve something.

At this time, Jiang Yuan put down the bones in his hand and turned to ask: "What does the DNA report say? Is it a mix of Chinese and Malay?"

"Yes. Eh, can this be seen?" Jacob was still fantasizing in his mind whether Jiang Yuan would take out a bone and describe what occupational strain or metabolic disease the deceased had during his lifetime, but he heard a judgment of mixed blood at the beginning.

This was much harder to judge than a single race. Because single-race judgment is supported by basic research, while things like the mix of Chinese and Malay probably only exist in the Malaysian ethnic group, so it shouldn't be seen by a Chinese forensic doctor. It would be about the same if it were said by a local Malaysian forensic expert.

Jiang Yuan just "hmm" and said: "The nasal root point of the deceased is medium to low, and the width of the piriform aperture is between Chinese women and Malays. In addition, the pelvic angle is 95 degrees, the sacrum morphology tends to be the short and wide type of Malays, but the sciatic notch is close to Chinese... Preliminary judgment, the proportion of East Asian Han genes is about 60%, and the proportion of Malay genes is about 40%, so it should be a local Malaysian, and it is no longer a first-generation mix."

Jacob turned around and silently took out the DNA identification report, quickly turned to the race identification column, looked up at Jiang Yuan, and suddenly felt a bit sorry for him.

If it were 20 years ago, when DNA technology was not mature, just this one race judgment by Jiang Yuan would have been enough to kill in various ethnic groups in the United States, so why would he only be crowned as "God Jiang."

"Biological aspects. Female, 35 years old, height 162 cm, no pelvic deformity, no history of childbirth. Right clavicle old fracture, healed about 6 years ago."

Jiang Yuan didn't look at the other bones anymore and started the output directly.

Jacob and the forensic doctors beside him hurriedly opened their recording pens and began to record at the same time.

Jiang Yuan waited for them for a while and then said: "The lower limb bones of the deceased have stress changes, periosteal bone hyperplasia on the posterior side of the femur, and increased roughness of the bone surface. The articular surface of the talus has asymmetric wear. In addition, the knee joint damage is relatively serious, the meniscus wear is very serious, suggesting long-term meniscus damage, secondary osteoarthritis. There is also L4 transverse process bone hyperplasia of the lumbar spine..."

Jiang Yuan said a large number of professional terms in one breath, making Jacob and other forensic doctors' wrists stiff from writing.

"Above, what conclusion can be drawn?" Jiang Yuan finished speaking and, like in the country, asked subconsciously.

Jacob didn't feel anything wrong at all and said carefully: "A lot of exercise damage, suggesting that the victim likes exercise?"

The forensic doctor beside him added: "And it's not an ordinary exercise hobby, it should be long-term training, at least at the level of a senior enthusiast."

"What exercise?" Jiang Yuan then asked.

Jacob hesitated for a moment and said: "Periosteal bone hyperplasia on the posterior side of the femur, plus knee joint and lumbar spine lesions... Cycling? Cycling-related?"

"If it were cycling, reaching this level, there would usually be ischial tuberosity periostitis." Jiang Yuan denied it without thinking.

Jacob was stunned and hurriedly made a record.

At this time, it was already a bit like an internal medicine diagnosis.

You know the symptoms, you have to infer the cause. It is said that there are some matching items, but in fact, the current case is not a question written on the test paper. A real skeleton will have many appearances, and considering these appearances comprehensively is not a simple combination question.

Some appearances are even interference items.

For Jacob and others, they have been working for many years. For forensic anthropology, the daily use is mainly to judge gender, judge height, and then look for obvious medical marks.

Judging occupation or hobbies based on the stress changes of bones is equivalent to a test question for LV2 Great Perfection of forensic anthropology. Just the question stem alone is enough to stump them.

Just like Jiang Yuan said "periosteal bone hyperplasia on the posterior side of the femur, increased roughness of the bone surface," this sentence itself is not simple.

There are many reasons for the increased roughness of the bone surface. After any person is boiled and detached, some rough bone surfaces can always be found on the body. The problem is how rough is rough, and the roughness of bones in different positions, and even bones of different races, are different. It is also necessary to exclude some internal diseases.

On the other hand, most bone surface roughness is meaningless, and Jiang Yuan specifically brought it up, considering it in conjunction with "periosteal bone hyperplasia on the posterior side of the femur." Just this point alone shows that Jiang Yuan has a direction—Jacob had no ideas in this regard at all.

Jiang Yuan didn't really want Jacob to answer. He saw that several people were interested, so he led his own thinking path out. If they were interested, they could think about it and make up lessons when they went back, and they would gain something. If they weren't interested, it would just be a process of self-questioning and self-answering.

Jiang Yuan put out a few bones he had just mentioned, placed them separately, and said: "I think the victim should have been long-term skiing during her lifetime, and for a period of time, the training intensity was relatively high. Of course, you are in Malaysia, and it is normal not to be familiar with skiing."

Jacob's blank expression flashed, and he hurriedly took the conversation: "If it is long-term training and a senior enthusiast, the local ski resorts in Malaysia should not be able to meet this demand, suggesting that the victim grew up abroad, or often traveled between Malaysia and some ski regions?"

Jiang Yuan said: "Judging from the situation of the bones, she should have been skiing for a long time after adulthood. At least in the few years before her death, she was still skiing. By the way, the old fracture of the clavicle was very likely caused by skiing."

Jacob "whooshed": "That is to say, she is a woman who often goes abroad, and her flight destination is often a ski region. It shows that her family conditions are also very good. In addition, she is a mix of Malay and Chinese, 35 years old, 162 cm tall, no history of childbirth, had a serious fracture 6 years ago... I think it can be precise to the person!"

(End of chapter) ===== CHAPTER 1261 =====