The forensic doctor on the task force is Zhang Yuanchao's disciple, doctoral student Li Changgeng. When Lu Chuan did the first skeleton identification and analysis, it was Li Changgeng who discovered it while he was on duty.
The two have worked together many times during this time and are already familiar with each other.
"Lu Chuan, will you participate in the autopsy?" He invited Xian Investigation to participate in the autopsy, which was mainly to investigate the surface marks on the body.
But in this scene, it is actually no longer necessary.
"Brother Li, the investigation in the room is basically finished. I will not participate in the body examination." The murderer committed the murder neatly. He killed people when he entered the house and left after killing them. He never came into contact with the corpse.
The basis for this determination was the footprints in the room. The footsteps entering and leaving are clear.
The trajectory of comings and goings is easy to judge. Li Changgeng nodded and began to perform the autopsy. The autopsies in these three cases were all handled by Li Changgeng.
To be honest, there's really not much to do. The cause of death of the corpse is clear, the manner of death is clear, and the time of death is relatively easy to infer.
With a gentle press on the corpse in front of him, Li Changgeng knew that the rigor mortis of the corpse had begun to disappear. Rigor mortis is one of the most important criteria for judging the time of death of a corpse, especially for corpses that died within a short period of time.
Generally speaking, rigor mortis begins to appear ten minutes to seven hours after death. The time is not particularly fixed and is related to different genders, ages, physical fitness, and obesity levels.
There is a certain pattern and order for rigor mortis to appear on a corpse, such as from top to bottom or bottom to top. According to the degree of rigor mortis in different parts of the body, the time of death of the corpse can be judged.
In most cases, rigor mortis reaches its peak state between twenty-four and forty-eight hours, and then gradually resolves.
It will disappear completely after the third to seventh days, and the order of disappearance is the same as the order of occurrence.
The stiff parts are relieved first. Rigor mortis, as one of the most obvious early symptoms of corpses, is the most direct basis for forensic doctors to directly determine the time of death of the deceased.
As for why rigor mortis occurs, there is still no unified scientific conclusion. But most scholars believe that this is related to human muscles, especially the decomposition of adenosine triphosphate.
"The cause of death of the male corpse was chopping of the neck with a sharp weapon, fracture injuries, and excessive blood loss." If the neck is broken, the person will die from excessive blood loss before the brain is deprived of oxygen.
In other words, the person was conscious at the moment of being beheaded. It's just that because the brain and body are separated, people can't react at that moment.
Apart from blinking his eyelids, he can't do anything else.
"Time of death, between forty-eight and fifty-two hours."
"The cause of death of the female corpse was chopping the head with a sharp weapon, brain splitting, and brain death."
"Time of death, between forty-eight hours and fifty-two hours..." Li Changgeng made notes in the autopsy record book while inspecting it.
Just like the current investigation, when the forensic doctor performs a corpse examination at the crime scene, he will first conduct a surface examination of the corpse from top to bottom and from the outside to the inside.
All inspection items have prescribed procedures. Each time an item is completed, fill in or check an item in the record book.
While Li Changgeng was doing the autopsy, Lu Chuan followed the murderer's footsteps and came outside the tiled house. It was very cold in January and it snowed heavily just a week ago.
But the victim, Zhao Dong, was obviously a diligent farmer. His yard was clean and there was no snow.
The murderer's footprints can still be clearly identified indoors, but outdoors they are no longer identifiable.
The other party was killing people indoors very quickly. When the blood of the deceased was flowing to the ground, the murderer had already left.
Therefore, the murderer’s footprints were not stained with blood. This is true for all three scenes. This is one of the most difficult cases Lu Chuan has ever experienced since he became a police officer.
Apart from footprints, the other party basically left no traces. Lu Chuan has even conducted trace evidence analysis on the footprints of the murderers at the two previous scenes.
Of course, it cannot be said that there is no effect at all. The shoes the murderer wore were new, just ordinary yellow rubber shoes.
They are sold in any market or supermarket. As for the mud and dust carried by the soles, there are no specific findings.
It can be said that with Lu Chuan's current primary footprint identification and analysis capabilities, he has reached the limit of what he can do.
The sky is blue, windless and cloudless. Lu Chuan stood in the yard and took a deep breath. The air containing the unique smell of cow dung filled his mouth, making Lu Chuan feel a little sour.
Turning around and looking, in the west wing, five Friesian cows were leisurely chewing the regurgitated fodder in their stomachs. Their big eyes were round and peaceful.
He didn't realize at all that his master was killed and he would have no fodder in the future. Um? forage? Lu Chuan was slightly startled.
Zhao Dong has been dead for more than two days. Why haven't these cows finished eating their fodder? Lu Chuan quickly stepped forward, walked to the railing of the cattle pen, and took stock of the situation inside.
The hay troughs used to feed the cattle have long been empty. However, there was a lot of hay piled up on the ground. The two cows were lying next to the hay pile, eating and chewing leisurely.
That kind of leisurely and comfortable feeling is quite like opening your mouth after eating. In addition, there are two sinks made of plastic buckets in the cattle pen.
The semicircular white plastic bucket looked like it was a large plastic bucket cut in half horizontally to make a sink.
The water stains in the two sinks were a little turbid, but there was still about one-third of the water left. A calf is drinking water.
Of course, to be precise, they should be gnawing on ice. The water has long been frozen into ice stacks, and the little cows are gnawing away.
After Lu Chuan observed for a while, he looked at the layout of the courtyard. Then he put on his gloves again and opened the unlocked door of the east wing warehouse.
A large pile of fodder was neatly stacked, and there were three or four white plastic barrels about one meter high in the innermost part.
After a while, Lu Chuan returned to the room. Sun Zhiyou, who reported the crime, is still being questioned. Chen Kang saw Lu Chuan walking towards him and knew that the other party might have something to do. He winked. Seeing Lu Chuan nodding, Chen Kang looked at his colleague beside him: "You continue to ask." Outside the room, Chen Kang took Lu Chuan Zhonghua Ciyan was handed over: "What's up, brother, is there something wrong?" Although Lu Chuan was only an active detective of the Haizhou City Criminal Investigation Detachment, his participation in handling the case this time was also a temporary transfer.
But Chen Kang and everyone else had a very good attitude towards Lu Chuan. Although Lu Chuan is young, his field survey skills are indeed good.
Having experienced two murder scenes, everyone knew that Lu Chuan was expert in spot investigation. Not to mention footprint identification and analysis.
Moreover, I heard from Li Changgeng that Lu Chuan's skeletal identification analysis was much more powerful than footprint analysis. Furthermore... no one dislikes anyone who calls Huazi a companion when they meet.
No, the two of them went out to smoke, and a few criminal policemen gathered around them. Lu Chuan casually took out a new pack of Chinese cigarettes, opened them and distributed them to everyone.
"This case... is difficult."
"No, this bastard is most likely a professional, he's so neat at work."
"Hey, I didn't leave any clues. Killing someone is like killing a chicken." Lu Chuan and others were busy, and so were the other detectives.
The group of Yumin Village is a small village, with less than thirty households in total, and the total number of people in the village is only more than fifty.
In such a small place, it stands to reason that outsiders would be discovered immediately. But no.
"It's possible that the murder occurred at night. The victim was in charge in the village, so it might not be easy for outsiders to find out when he comes." Everyone started chatting with each other.
Chen Kang smoked half a cigarette, listened for a while, and said to Lu Chuan: "Xiao Lu, is there something wrong?" He was just asking the reporter, and Lu Chuan would not interrupt him if nothing happened.
"It's not a big deal, Brother Chen. When you question the reporter later, by the way, how do you feed the victim's cows?"
