Chapter 273 Lion Head

Jiang Yuan currently has level 3 forensic anthropology and level 3 forensic clinical medicine.

Compared with forensic doctors of the same level, he has an advantage in that his knowledge system is extremely complete.

He knows everything within the level 3 scope of forensic anthropology. He also knows everything within the level 3 scope of forensic clinical medicine.

This is actually a very buggy thing.

In other words, if a set of papers is given based on the level of forensic anthropology level 3, Jiang Yuan can basically answer 100 points.

But the reality is that most people, even expert forensic doctors, are actually a little biased.

For example, Shannan Province's own level 2 forensic doctor Zhang Fengtian, his forensic anthropology may also be level 3, but if he takes a level 2 paper, he will definitely get full marks, and if he takes a level 3 paper, he may get 80 points or 90 points.

There are always some special details, more niche, or unpopular knowledge that he has never studied or researched in detail.

This is not actually affected in daily work.

There is never only one way to solve a criminal case. In the eyes of some people, many cases have only one clue or no clue, but in the eyes of others, there may be multiple clues.

Like ordinary criminal police, when they arrive at the crime scene, they look for DNA, fingerprints, surveillance, mobile phones, and if that doesn't work, they look for eyewitnesses. Only a very few people can pay attention to footprints, and those who can pay attention to the form of blood rather than the blood itself are rare in this era.

But for Jiang Yuan, these are all targets within his range. He can make a breakthrough by choosing any weak link.

In other words, the suspect needs to pay attention to all these links, and it is possible to escape punishment if it is concealed to a considerable extent.

Similarly, for Zhang Fengtian, a forensic doctor in Shannan Province 2. He has many technical means, but it does not mean that he needs to master all the relevant knowledge-especially the niche knowledge of bone shrinkage rate that has not yet reached a clear conclusion. Even if he immediately starts to look up papers and focus, call for consultation, etc., he will not be able to figure it out in a few days.

As for which shrinkage rate is more suitable in the end, there is still only a rough idea, and no accurate conclusion can be drawn.

That is to say, even if Zhang Fengtian starts from the shrinkage rate of burned bones and starts to make up for his knowledge gap, it will take several days. Secondly, the conclusion he draws is still probabilistic, which means there is still a possibility of error.

Similar to Jiang Yuan, in this case, Yu Wenshu has to make the final decision and be the person in charge.

Even so, he can only give the possible age, gender and height of the victim in the end...

As a long-established forensic doctor, Zhang Fengtian is probably unwilling to take this path.

Jiang Yuan doesn't care.

He is a little famous now, but he doesn't have an idol burden, and he shouldn't have an idol burden.

Sitting in the corner of the conference room, Jiang Yuan first measured each bone piece with a ruler.

The shrinkage rate is hovering around one or two percentage points. If the previously measured data is used and something goes wrong, it will be too bad.

Jiang Yuan measured it several times himself, recorded it, and then analyzed the degree of carbonization or vitrification of each bone piece.

Carbonization is 800 degrees, and vitrification is 1000 degrees, but these two values ​​are both higher than the level of existing literature and higher than the level of ordinary civilian furnaces.

Jiang Yuan sketched on the surface for a moment and estimated a value of 17% for the vitrified bone fragment.

Then, he estimated a value of 15% for the carbonized bone fragment.

By calculating in reverse, we can get the length, width and other data of the fresh bone fragment.

Then, by applying the regression equation, we can get the height of the deceased.

As for gender, it depends on several feature points.

In summary, there must be three estimates in this series of calculations. If it is slightly off, the final result may be very different.

Jiang Yuan understands Zhang Fengtian's conservatism more and more, but if you are afraid of making mistakes when doing a case, you can't do it.

Most of the time, criminal cases are trial and error, just like watching surveillance and checking fingerprints. They will find mistakes and dead ends again and again before they will withdraw and choose other more difficult ways to go.

It's the same with forensic anthropology.

If the estimate is wrong, just start over.

Despite this, Jiang Yuan still did it very carefully to reduce the error as much as possible.

…

Other people in the conference room could see Jiang Yuan's working status.

At this time, the 513 case was basically over, and everyone had nothing else to do, so they had to study the current case on their own.

Those who are good at making PPTs are more comfortable. No matter how little evidence there is in the case, it will not affect their making of PPTs.

The police officers who really have nothing to do go out and lift weights directly.

The conditions of Changyang Municipal Bureau are relatively good. There is a gym in the office building. Exercise and even private training are free. As long as you go, you can go.

Jiang Yuan turned the burned bone pieces over and over.

On his notebook, the values ​​were gradually listed:

Gender: Female.

Height: 165-172 cm.

Age: 22-25 years old.

When Jiang Yuan wrote the last entry, there was basically no one in the conference room.

"Go back to the guesthouse and rest." Jiang Yuan edited a short message and sent it to the detachment leader Yu Wenshu. Then call Wei Zhenguo.

Wei Zhenguo rubbed his eyes, looked at his watch, and said with a smile: "It's past dinner time, I fell asleep?"

"I didn't snore." Jiang Yuan comforted him.

"Have you found out the bones?" Wei Zhenguo saw that Jiang Yuan had put away the evidence box.

Jiang Yuan nodded and said: "I don't know if it will be useful. Let's look back at the feedback from the front line."

"You don't like it?" Wei Zhenguo was so familiar with Jiang Yuan that he could easily guess part of his thoughts.

Jiang Yuan nodded slightly and said: "Although it is an active case, it has been 15 days since the discovery. It also takes time to burn the body. If it is burned to this level, it may take several days."

"So, you are looking for someone who disappeared 20 days ago?"

"Yeah. At least." Jiang Yuan nodded. This information is still too little, although it is extremely troublesome to obtain.

Jiang Yuan left the police station, and Yu Wenshu's text message was also returned. It was just a short "good" word, not redundant.

Jiang Yuan glanced at Wei Zhenguo and said, "Go back and rest. We'll see the results of the investigation tomorrow."

The next day.

Jiang Yuan, Wei Zhenguo and others returned to the unit after eating and drinking. They saw a group of people playing and playing in front of the detachment building, and there were things jumping around.

When we got closer, we were sure that the one jumping up and down was a lion dancing, and opposite the lion was Yu Wenshu.

"Jiang Yuan, come here." Yu Wenshu waved Jiang Yuan over.

Jiang Yuan: "What's the matter?"

"This is the lion dance dressed up by Ruan Sijing's family." Yu Wenshu said: "Every year during festivals, especially the Spring Festival, his family will take the lion dance team to perform everywhere. Ruan Sijing's case was solved, and he The family came directly with the lion head."

Jiang Yuan hesitated for a moment and said, "The case has not been decided yet."

Yu Wen wrote: "For many people, knowing who it is is enough."

In a daze, the lion rushed forward and shook its head towards Jiang Yuan.

Jiang Yuan unconsciously reached out and touched the lion's head.

The lion's head stopped quietly and allowed Jiang Yuan to stroke it.