wavenovel Chapter 1238 Lying Down
Chapter 1238 Lying Down
Chapter 1238 Lying Down
"impossible."
Yang Yuhui and Xue Dehong hurried to Jiang Yuan's autopsy room.
A normal autopsy requires at least two people, and most of the time, a forensic assistant or something like that is also required, most of whom are outsourced or temporary workers.
At this time, the forensic assistant naturally cannot shoulder the responsibility.
Yang Yuhui is the forensic doctor in charge of the autopsy of the abandoned corpse case in Binshui South Road Park. He is a forensic doctor of the Zhengguang Bureau, graduated from a forensic medicine major at a forensic medical university, and is 35 years old this year. Although he is not very old, Yang Yuhui has enough experience and has performed and participated in the autopsies of many major cases.
It was a definite mistake to have mistaken the identity of the body. Yang Yuhui had been thinking about the case all the way here, and when he arrived at the place, his whole face was wrinkled.
"Didn't you collect DNA that day?" Jiang Yuanxian asked Yang Yuhui.
DNA is the gold standard. If the DNA can be matched, there won’t be so many problems later.
Yang Yuhui hummed and said, "We took several specimens, but we didn't get any DNA. I specifically took samples from the inner ear ossicles and the proximal end of the fingernails, but I didn't get any. We should have taken cementum, but based on the clothes she carried with her, the height of the body, the missing persons report, and the identification of her family, we had already determined the identity of the victim, so we didn't do any follow-up tests... Oh, I should have done it again to make sure it wasn't Li Ningxia?"
Since the auditory ossicles of the inner ear are protected by the temporal bone, the DNA degradation rate is slower. DNA can be obtained from many slightly decomposed corpses through the incus and other places. However, this is already a relatively advanced DNA testing technology. Generally, a DNA laboratory with an investment of three to five million yuan and one or two fresh graduates cannot handle it. For relatively backward provinces like Shannan, the work needs to be sent to the provincial department to do it.
Of course, the conditions in Beijing are much better. Not only the incus can be used, but cementum can also be used if necessary.
But cementum is more troublesome. It has to be anti-contamination when it is taken, and it has to be peeled under a dental microscope. Then it has to be sent to a laboratory with mini-STR technology to try to process it. The detection rate is not high, which means that several teeth have to be ground.
If it is an unidentified corpse whose identity cannot be determined, since the Beijing Bureau has the conditions, we can do the cementum test. If that doesn't work, there is the Ministry's Physical Evidence Identification Center. Single-cell whole genome amplification can challenge samples with a longer decay period.
But everyone who has worked in this field knows that no one would, once an answer has already been obtained, spend several times more time and more funds, especially the resources of the superior unit, to challenge this answer to ensure that it is foolproof. This kind of thing would only be done in a situation like Xu Taining, where one must die if one fails.
Determining the identity of a corpse through its clothing and personal belongings is one of the jobs of a forensic doctor, and this method is often used by many people, including Jiang Yuan.
A not-so-funny forensic joke: How to quickly identify a corpse? Look at his ID card.
Especially in the case of Li Ningxia's disappearance, Yang Yuhui's performance was above average.
However, criminal investigation judges heroes by results.
If you run into the murderer when you go out, it is your ability. If you are unlucky and run into the murderer sixteen times, it is also your stupidity.
The forensic doctor identified the wrong person, which was naturally unacceptable from the task force's perspective.
Jiang Yuan relieved Yang Yuhui's stress: "Judging from the bone age, he is definitely not 38 years old. However, it was your first autopsy that day, and it was a rotten corpse. You can't see the bone age like me."
Yang Yuhui smiled bitterly, feeling helpless as if he didn't know where to start. He sighed again and verified first: "The uterus was removed. I heard that you could tell the age deviation at a glance. Where did you find the bone age?"
"Uh...ribs and skull." Jiang Yuan said reluctantly.
"If the ribs and skull are used to determine the bone age..."
"The long bones can also be seen, and the spine can also be seen, as well as the clavicle..." Jiang Yuan knew what Yang Yuhui wanted to ask, so he started to arrange the bones in front of him.
Normal forensic doctors, under normal operation, look at the pubic bone to determine age and so on. Those who can use more than one bone need to have a deeper foundation in forensic anthropology.
Yang Yuhui obviously doesn't count.
But he understood immediately that although Jiang Yuan looked young, his research in forensic anthropology was incredibly strong.
Yang Yuhui was speechless for a while. After a long while, he asked, "Where are your clothes? You happened to be wearing the same clothes?"
"It should be the same piece of clothing." Jiang Yuan replied.
"This..." Yang Yuhui became more alert as he thought about it, and said, "Does this mean that the murderer had planned it?"
"It's possible." Jiang Yuan paused for a moment, then slowly said: "In fact, there are some unexpected circumstances, such as the height of the victim's body, which is the same as Li Ningxia's."
"Ah? This..." All kinds of stories suddenly burst into Yang Yuhui's mind.
"The next task is to find the identity of this unidentified corpse." Jiang Yuan didn't want to waste too much time correcting his colleague, so he changed the subject and got the topic back on track.
Yang Yuhui nodded quickly: "I can help..."
"It's not appropriate." Jiang Yuan refused on the spot without any further explanation.
"That's true." Yang Yuhui felt a little embarrassed. He said a few polite words and left quickly.
"We will go back and appease them." Zhan Kan recognized Jiang Yuan as his master, so he naturally stepped forward to explain on his behalf for such a small matter.
Jiang Yuan didn't take it seriously, and turned around and said, "We need to prepare a list of missing persons, and see if we can find a missing person or something like that."
"The body is not Li Ningxia's. No wonder everything went wrong during the investigation." Cui Qishan sighed and looked helpless when he looked at the file.
Investigating interpersonal relationships, looking for criminal motives, and even investigating with images and technical skills were all in vain.
Liu Jinghui has been thinking, and said: "The key now is whether Li Ningxia is still alive. Is she missing, or has she been taken away by someone, or is Li Ningxia the murderer? It can't be a complete coincidence, right?"
After he said this, the atmosphere in the autopsy room became even colder.
The deceased was wearing the same style and color clothes and pants as Li Ningxia, and was the same height as Li Ningxia. On the day of the incident, Li Ningxia disappeared. If you say that the two are unrelated, it would be a challenge to the IQ of the criminal police.
The consequences of disappearance are often bad. Just look at the previous case and you will know that the missing female college student may not come back alive.
Xiao Si said at this time: "I think it was a passive disappearance. Because if she had the power to decide, she would have found a way to take away her property. Hundreds of thousands of cash were thrown into the account and just lay there?"