civil forensic

Chapter 1252: Worry
Jiang Yuan looked at the information and drank green tea. When the tea was done brewing, Wen Youchuan, the forensic doctor from Jianjiang City, came pushing two suitcases.

Wen Youchuan had worked with Jiang Yuan several times and was quite familiar with him. When he arrived at the scene, he greeted Jiang Yuan, opened the suitcase, and started taking samples in batches.

The red, brown, tan, yellow, as well as green and black samples were re-boxed and laid out on the table.

While working, Wen Youchuan said, "Our Wu Zhi repeatedly told me to cooperate well and serve you well. My junior brother is still sorting out materials in the office. If you need anything, just ask. Don't tell Wu Zhi that it was me who said that..."

Jiang Yuan smiled and shook his head, then stood up and said, "Actually, I should go to Jianjiang City. Wu Zhi is too anxious."

Under normal circumstances, Jiang Yuan should have gone over to check the sample, but Wu Zhisu did not give him this option at all.

Wen Youchuan smiled indifferently and said, "It's not easy to come across a case that interests you. Wu Zhi naturally hopes to keep the Jiangyuan backlog case team in Jianjiang. If we let it go, we don't know when we can use it next time. Wu Zhi also told us last time that joining the Taihe working group has costs. He also disliked us for not doing a good job and disliked the working group for not paying attention to the work in Jianjiang."

hissing...

Huang Qiangmin sipped the green tea, and his lips and the rim of the cup made a slurry sound.

Wen Youchuan took a look and turned his head quickly, his heart beating faster and he asked, "Where should we start?"

"Are there any bone marrow specimens?" Jiang Yuan was referring to the bone marrow that contained diatoms.

According to the common people's thinking, they may think that the specimens containing diatoms are lung specimens. Naturally, if the deceased drowned in the water, the lung tissue is the first organ where diatoms are deposited. But the gold standard for diatom diagnosis is bone marrow!
Because bone marrow is highly specific and can only be reached through the circulatory system during life, if diatoms are found in the bone marrow, it can be determined that the person died of drowning, thus eliminating the possibility of posthumous abandonment of the body.

Of course, it does not mean that there must be diatoms in the bone marrow of a drowned corpse, but if the forensic doctor has doubts about the cause of death, it is a better choice to remove the bone marrow of the long bones. If there is any.

Similarly, a forensic doctor may not take a bone marrow sample unless there is a need.

Wen Youchuan nodded and said, "There is only one case where a bone marrow specimen was taken and found. The floating corpse case of 1011. It happened 8 years ago."

"You were in charge of this?" Jiang Yuan watched him skillfully find the specimens and files.

"Yes. I did it with another forensic doctor." Wen Youchuan said, "The body was highly decomposed. When it was found, the muscle tissue had turned into mud and the organs had melted away. During the autopsy, we found blunt force trauma on the head and fractured hand bones, and then we filed a case."

Jiang Yuan nodded slowly, guessing that the spontaneous fusion of organs was the reason why they made the bone marrow diatom.

Extracting bone marrow is relatively troublesome. Human leg bones are very hard, and it is difficult to use an electric bone saw, especially for decayed corpses, where the bones are slippery and greasy, and fixation is a big challenge. The whole process is very labor-intensive. In general cases, forensic doctors do not like to take this specimen unless it is necessary. The most troublesome thing is that bone marrow extraction requires sterile operation, otherwise the diatoms outside will contaminate the bone marrow, and the whole operation will be in vain.

"Then let's compare it." Jiang Yuan said, taking the bone marrow specimen and looking at it under the microscope.

Wen Youchuan began to prepare other specimens from the same case, as well as specimens from other cases.

He is a forensic doctor, so he naturally understands what Jiang Yuan's operation means.

The application of diatom database is part of forensic botany, and the analysis and identification scheme is similar. In general, the diatom maps of rivers and other water systems are stable for a long time. Diatoms in different locations will have many different species and forms, which makes the diatom map of any location unique.

Jiang Yuan is now comparing the diatoms in the specimen. As long as he matches, there is a high probability that he has found the place where the person fell into the water or the place where the body was dumped.

This is a major breakthrough in the drowning case.

Among them, bone marrow specimens are 100% the drop point. Other visceral specimens can also bring similar value, such as liver, kidney, spleen and heart, which may have diatoms due to systemic circulation. Lung specimens are even weaker.

However, finding the place where the victim fell into the water is still a long way from solving the case. Wen Youchuan recalled the drowning cases he had handled before and secretly prepared himself mentally.

Cases like this always take a long time and are exhausting, but as a police officer, you have no choice...

Wen Youchuan was thinking while sipping his tea.

Not long after, Jiang Yuan raised his head, waved for the file, and began to read.

Wen Youchuan's tea suddenly lost its fragrance, and he leaned in closer and asked in a low voice, "Did you win?"

"I won." Jiang Yuan nodded.

"Huh, did I win?" There was no cheering or celebration as Wen Youchuan had imagined. For a moment, he didn't know what to say.

"This case fits the bill, so let's do it first. 1011 floating corpse case." Jiang Yuan pointed to the final conclusion of the forensic report: complete diatoms were detected in the bone marrow of the right long bone, which was inconsistent with the water sample.

"The conditions are quite suitable, so there's no need to be picky." Jiang Yuan explained, "Diatoms were detected in the bone marrow sample, indicating drowning. It's inconsistent with the water sample, which means the place where the body was found is not where the deceased fell into the water. Of course, we now know the specific place where he fell into the water..."

While Jiang Yuan was speaking, Qiao Shengli next to him printed out the address from the database and handed it to him.

"The body fell into the water in Fanjia Village, upstream of Ningtai County. Check if there are any murders or missing persons here." Jiang Yuan gave orders to Wang Chuanxing and others, then turned to look at Wen Youchuan and said, "Is the body still there?"

"Only bones are left. The body was too badly decayed to be saved." Wen Youchuan explained quickly.

In the case of an unsolved homicide, it is best to keep the bodies involved. Even if the results of a second autopsy are poor, it is still better than nothing.

However, it is indeed difficult to preserve a highly decomposed corpse. When the organs have spontaneously melted, it is not just the heart, liver, spleen, and kidneys that have melted. The structure of the gastrointestinal tract has also become blurred, and the contents will overflow - but it doesn't really matter. The smell of the corpse at this point is already extremely complex, and a little more or less will not make a difference.

"Let's see the electronic version of the photos." Jiang Yuan called Wang Chuanxing over again and specifically asked for photos of the skull and hand bones.

"Political Commissar Huang, Wu Zhi is here." The subordinate came over to report.

Huang Qiangmin stood up and looked at Jiang Yuan.

Jiang Yuan naturally took out the two-color Guan Erye he was wearing from his arms and touched it lightly.

Huang Qiangmin felt relieved.

According to the code agreed upon by the two, this shows that Jiang Yuan is confident that he can handle the case, which is roughly equivalent to the difficulty of paying homage to Guan Yu once.

Huang Qiangmin straightened his clothes and went out to greet him.

Wu Zhisu walked in hurriedly with a smile on his face.

Before he could greet her, Huang Qiangmin shouted, "Wu Zhi, your case is really worrying!"