Jiang Yuan did not immediately go to dissect the body.
Now, the first thing to do is to determine the time of death.
The most familiar thing to the public is corpse temperature, but it is only used for freshly deceased corpses. When the corpse was at the scene, a thermometer had been inserted into the anus, but it was of no use.
Judgment criteria other than corpse temperature are all statistical summaries.
For example, the skin of the corpse in front of him has been swollen and shriveled. At the same time, the rigor mortis has also eased. Looking at the skin that has fallen off in many places during the transportation process, Jiang Yuan made a rough judgment: "The recent water temperature is about 20 degrees, and death is
It should be within 2 to 5 days?”
Determining the time of death of a corpse, especially the accurate time of death, is very difficult. It can even be said that it is the most likely to make mistakes in forensic work.
In many TV series or movies, the forensic doctors who can give the time of death in hours at a glance are either incredibly powerful or can only be explained by the plot.
In reality, forensic doctors can still give a relatively accurate time of death for corpses that are within 12 hours, or at most 24 hours, such as 4 to 8, or 6 to 12 hours. For corpses that have been dead for more than one day, then
To judge the time accurately requires many favorable conditions. Misjudgment is nothing new.
An extreme example is Professor Bass of the University of Kansas in the United States in 1977. He identified a corpse with a gunshot wound to the head. Because the muscles were well preserved and had a healthy pink color, Bass concluded that the body had died within a year.
, but in fact, the body belonged to Army Colonel William Shay, who died in the Civil War. The body was preserved in a sealed lead coffin, so it was the body in 1864, which was 113 years different from the death time speculated by Professor Bass.
Bass therefore created the famous "Corpse Farm", but this still could not completely solve the problem of time of death.
Many forensic doctors make mistakes in the time of death, but the judgment of the time of death greatly affects the progress of the investigation.
Jiang Yuan gave a time of 2 to 5 days, which in Wu Jun's opinion was quite pertinent.
After recording Wu Jun's certified answers in a notebook, Jiang Yuan stood up straight and examined the corpse on the autopsy table.
Jiang Yuan had performed normal autopsy several times, and basically every time three cavities were opened.
After the three chambers are opened, generally speaking, the cause of death should be found.
Occasionally, I hear that there are negative cases, that is, in the popular sense, the cause of death cannot be found on the body. If you check the limbs and other locations, you will often get the answer.
However, of the half of the corpses Jiang Yuan faced today, none of the three cavities were left. In other words, this corpse was not left in the place where a normal autopsy would be done.
To be honest, when Wu Jun handed the knife to Jiang Yuan, he had no idea what to do.
In his opinion, there is not much left to pay attention to in this kind of cadaver anatomy.
"I'll start from the pelvic cavity." Jiang Yuan said softly after positioning the body.
Wu Jun said "yes".
The pelvic cavity of a normal male corpse contains the bladder, testicles, prostate, vas deferens, urethra, etc. However, today’s corpse is already a mess between the legs. It is not only bloated and rotten, but also probably eaten by fish in the river.
After eating, or being pulled out by the organs in the abdominal cavity. In short, no organs in the usual sense were retained.
Jiang Yuan followed the normal procedure and separated the extraperitoneal soft tissue from the retropubic bone, then cut open the peritoneum and observed the situation inside the pelvic cavity.
Nothing was found.
Jiang Yuan didn't say a word, and continued to follow the process of partial anatomy, drawing it all the way down.
Forensic anatomy is sometimes like solving a problem. The problem solver wants a result, but the idea of solving the problem is not there from the beginning.
At this time, you can only list all the conditions and then think about them based on the conditions.
This is also the big difference between forensic doctors and doctors.
Doctors usually have to make a plan before operating, and they don't say to open up the abdominal cavity and think about it while searching.
However, forensic doctors do not have as many examination conditions as doctors. Forensic doctors often adopt the simplest and most direct plans.
Only when you see the clues can you follow them and draw further conclusions.
Jiang Yuan and Wu Jun were busy cooperating with each other, staring at the dissection table without blinking.
What they expect is to see some characteristics, such as traces of surgery, such as bladder surgery or varicose vein surgery, which can further narrow down the scope.
Or, the victim has sports injuries, such as ankle scars, which is also a good entry point.
Of course, it is best to have a prosthetic limb, such as an artificial foot, and bring a number with it. Contact the relevant company and you can immediately get the name, age and other information.
"The color here is wrong, isn't it?" Jiang Yuan suddenly stopped the knife and put it aside.
Wu Jun's eyes were slightly dim and he frowned and looked over.
"Here...the lymph nodes have turned black." Jiang Yuan turned over the skin of the corpse, and then moved away the muscles that interfered with judgment, exposing the lymphatic vessels in the thigh.
Lymph that should be white or creamy yellow turns blue-black at this time.
Wu Jun came closer to take a look and couldn't help but nodded: "It has indeed turned black. Take a sample."
"Okay." Jiang Yuan cut off a little bit and put it into the test bag, then opened the outer skin and said, "It shouldn't be cancer. There is no obvious swelling and no characteristics of cancer cells."
"Well, the risk of cancer is lower for young people in their twenties." Wu Jun pressed the lymph node twice and frowned: "It really doesn't look like a lesion..."
Jiang Yuandao: "Could it be a tattoo?"
"Tattoo?" Wu Jun's mind turned a little slower. When Jiang Yuan reminded him, he couldn't help but nodded: "It is possible that the dermal layer was pierced during the tattoo... However, there is no tattoo outside."
"The tattoo has been washed away, but the color of the lymph is still there." Jiang Yuan pulled some of the deceased's skin over again and said, "Look carefully, you can actually see some marks. It was too badly soaked."
Wu Jun nodded slowly after hearing this. For forensic doctors, tattoos themselves are a very good feature. It is said that everyone in the United States Marine Corps has tattoos, not just to make it easier for forensic doctors to identify the corpse...
However, Wu Jun was not very familiar with tattoo removal and asked: "Can it be washed so cleanly now?"
"There is a certain probability of laser tattoo removal." Jiang Yuan pointed to the leg surface of the corpse and said: "The area of his tattoo is not large. Looking at it now, you can see a little trace. It is relatively clean and there is no scar.
, it should have been washed in the hospital, there may be records of this."
"You have a good idea. I'll call Team Huang. The ones who use laser tattoo removal in the hospital happen to be removing the tattoos on the thighs. There shouldn't be many of them." Wu Jun took off his gloves and washed them a little.
Just started making phone calls.
When the call was dialed, Wu Jun was heard shouting to the other end of the phone: "...it's at the Fengshi point, which is where your hand naturally hangs down and your fingertips touch the thigh. That point is a little bit toward the leg surface.
