When Lu Chuan and others rushed to the scene, they felt a little incredible when they saw the scene in front of them.
After receiving the report, the criminal police brigade here investigated the scene and decisively decided to report the case to the criminal investigation detachment.
Because there were too few things found at the crime scene.
Police from the local police station were the first to receive the call.
“The person who reported the crime was the ranger in the mountains.”
"The ranger who reported the case worked as a hunter in the mountains in the early years. Later, after the mountains were closed for forestation, he became a ranger here."
"He discovered these residues when he was patrolling the mountains this morning. It was ashes. After looking at it, it didn’t look like the bones of wild animals or cattle or sheep, but it looked a bit like human bones, so I reported it.”
When the ranger was a hunter in his early years, he often roasted the prey he caught. Animal bones are relatively familiar.
Zhang Hui is listening to the police's report here, and Lu Chuan has already started conducting spot surveys.
The crime occurred in an open area in a valley.
There are no tall trees around, but there are some dead grass.
The person from the Tianshan District Criminal Police Brigade is their forensic doctor.
“After receiving the alarm, I did a rough survey and found that there was a high probability of human bones at the scene.”
“But I did not conduct a rash survey because there was very little residual ash at the site. Afraid of not being able to figure it out, I asked the brigade captain to report it. "
The forensic doctor of the Tianshan District Criminal Police Brigade is also about to retire. He is in his 50s and his name is Tian Feng.
Lu Chuan put on his gloves, picked up a branch nearby and scraped the ashes on the grass.
There are differences in the ashes after burning the bones of different species.
Generally speaking, the color of the ash after burning animal corpses is darker than the color of the remaining ash after burning human corpses.
This is because most animals have thicker fur.
After the hair is burned, the protein is charred, leaving a black powdery substance.
These black powdery substances are mixed with the remaining ash after burning animal bones, and the color is relatively darker.
The remaining ashes on the ground are pink and white in color, highly similar to the color of ashes, and should be leftover after the burning of human bones.
But, just like Tian Feng said.
There were too few ashes left at the site.
In the identification and analysis of skeletons, DNA information samples can be extracted from ordinary skeletons.
But the same cannot be said for the burned remains.
There are two main ways to identify DNA, one is DNA identification and the other is RNA identification.
But whether it is the former or the latter, they are actually extracting ribonucleic acid.
It is impossible to extract these substances from the ashes of burned bones.
So it is difficult to identify the type of bones through DNA identification.
However, it is nothing new for the murderer to burn the body in the wild to destroy the body and eliminate traces of it.
So in response to this situation, the criminal police investigating the scene had their own method.
"Brother Yang, get the sieve."
Yang Sen nodded. After completing the site survey and taking photos, Yang Sen returned to the site survey vehicle to get the sieve.
To deal with this kind of burned skeleton, using a sieve to sift out relatively large remaining lumps from some fine ashes is the best way to deal with this kind of scene now.
In a case like this, determining the identity of the skeleton is paramount.
Most cases of corpse destruction and trace removal are committed by acquaintances.
Therefore, only when the identity of the deceased is determined, can the scope of criminal suspects be determined by investigating the interpersonal relationships of the deceased.
Because the time for burning the corpse is uncertain, and after the wind blew during this period, there was actually very little ashes left on the ground.
For burned corpses, site investigation involves more than just getting some clues from the final ashes. In fact, the entire combustion process is also very important.
The burning of corpses is very different from what most people imagine.
There is also a big difference between burning a body in the wild and burning a body in a funeral home crematorium.
In the past, there were some differences between the burning of corpses in funeral parlor cremators and the burning of corpses now.
In the past, in order to fully incinerate the corpse, some combustion accelerants were added to the crematorium.
Not only that, during the incineration process, previous incinerators would also cause some physical damage to the corpse in order to prevent the body from exploding due to uneven air pressure inside and outside the body.
Commonly known as disembowelling.
When Lu Chuan was in college, he once watched a film and television work in which the protagonist was named Li Toyota.
This is a ruthless man who soaked his fingers in sulfuric acid in order to hide the traces of his crime.
In one scene, after Li Toyota killed someone, he wanted to use an incinerator to dispose of the body.
But before that, physically destroy the body with a shovel.
The purpose is to prevent the body from exploding during the burning process.
But now, most use high-temperature and high-pressure incinerators, combustion accelerants are rarely used, and physical destruction is no longer needed.
But the process of burning a corpse in the wild is different.
The corpse exposed to the air will produce the legendary corpse phenomenon during the burning process.
The body will suddenly make violent movements during the burning process.
Such as sitting up suddenly.
In fact, it is more accurate to say that it is similar to a boxer's attack.
Lift your feet, bend your hands forward, and clench your fists.
The whole body forms the shape of a bow.
The reason why this happens is because the first thing the muscles lose during the burning process is water. After losing the water, the muscles naturally contract and will naturally form a boxer's state.
But this time does not last particularly long. When the muscles also burn, this phenomenon will disappear.
In the incineration process of a funeral home, the main reason why this phenomenon does not exist is that the body will be physically crushed after entering the incinerator.
The large joints of the human body will be destroyed, so it is difficult for this situation to occur.
Yang Sen, Lao Bai and Tian Feng began to sift through the ashes of the bones, while Lu Chuan looked around for any traces that the suspect might have left.
On the Beishan side, the roads that can be accessed after the mountains were closed for afforestation are basically covered with weeds.
It is impossible for ordinary vehicles to drive in, but for some mopeds such as bicycles or tricycles, it is not a big problem to get in.
Some criminal policemen from the action team soon discovered some residual wheel marks around the body.
Lu Chuan took one look and knew it was a tricycle.
But there are no other traces.
Lu Chuan originally wanted to make a model of the tricycle tire marks, but because it took a long time, it was difficult to make a model, so he had to take pictures first.
Everything is going on in an orderly manner.
The first thing that was discovered was the ashes sifted by Yang Sen.
After using a sieve to sift through all the ashes on the ground, I found some slightly larger bones.
However, these so-called larger bones are just small bones about three centimeters long.
And there are only two in number.
Under the ashes, there were only two small bones of about three centimeters, which were black.
In addition, two teeth-like remnants with melted edges were found. (End of this chapter)