The color of the skin of the corpse is also one of the important indicators to judge the time of death of the corpse.

In general, a corpse retains its original color for a short period of time after death.

But over time, the color of the corpse slowly changes.

In non-frozen conditions, the color of the carcass will change over time, experiencing bruising, reddish, brownish, sallow, light green, dark green, and even black-green.

In the absence of external intervention, there will eventually be a giant view, which will then become corrupted and then ossified.

In the case of freezing, the color of the corpse changes differently, the process of bruising will be slower, and if the temperature is low enough, there will be no subsequent decay changes.

In addition, in some special cases, such as the death of the deceased from gas poisoning, the color of the skin, especially the lips, will appear cherry red.

The corpse at the scene was completely frozen, and in this case it is not possible to judge the time of death based on the degree of stiffness.

The temperature has also been in line with the outdoor temperature, and the skin color has not changed much.

Wang Changjiang's estimate of death within a week is a relatively conservative estimate.

Because, after more than a week, even in the frozen state, the color of the corpse will change to a certain extent.

However, there were not only corpses at the scene where the bodies were found, but also specks of blood.

Wang Changjiang went on to give further estimates of the time of death: "There are specks of blood on the snow, indicating that the murderer did not stiffen the body when he threw it, otherwise there would not have been blood dripping out after the wall was bruised." ”

"Combined with this situation analysis, the time of death of the deceased should not have been more than forty-eight hours."

So far, the cause of death is strangulation, mechanical asphyxiation.

The time of death was within forty-eight hours.

The photographs, preliminary examination of the body, and bloodstain collection have all been completed.

Liu Guodong packed up the survey equipment, turned around and looked around the corpse: "Xiao Lu, I'll go through the outer spiral first, and you can walk through the inner spiral." ”

Lu Chuan nodded, the on-site investigation is not just about taking a picture of the scene, and collecting physical evidence materials can be over.

Every on-site survey has a certain prescribed process, and the search of the site is the most important component.

There are four common survey search methods: straight line search, grid search, area search and circumferential radiation search.

Generally speaking, straight-line search is more widely used in outdoor type scenes, and criminal police are commonly known as tapes.

The last time Lu Chuan was in the case of Song Kun's murder, the vehicle that caused the accident hit the scene and found traces of vehicle acceleration more than 100 meters away, and this search method was used.

Grid search is targeted at indoor scenes and is often used for smaller, more complex crime scene searches.

Specifically, it is a method of starting from one end of the wall of the site, searching along a straight line to the other end with a width of no more than 50 cm, and then turning around and searching along the parallel line of the first search to the other end after reaching the other end.

After searching for a plane, such as a north-south plane, the search continues in the search mode of the search endpoint in the same search mode of the east-west plane.

This method is the most systematic and thorough, like a cat hunching its back and preparing to catch mice, cautious and meticulous.

The regional search method is that multiple people continue to search a large area.

For example, when the mountain was searched in Jiguan Mountain, police dogs and hundreds of police officers were dispatched to conduct an area search.

Now, Liu Guodong is going to use a circular radiation search.

This method is mostly used in outdoor scenes, with the corpse as the center, and the criminal police are searching in circles.

There can be two modes, one is the outer spiral, which starts from a distance and turns in a circle to approach the corpse.

There is also a type called the inner spiral, which is to use the corpse as the starting point and turn outward to search in a circle.

Lu Chuan and Liu Guodong cooperated with each other to better search the scene.

While the inside of the fence was busy, the survey outside the fence continued.

However, looking at the faces of Yang Sen and Lao Bai, I know that the gain is not too big.

"There is a path on this side of the fence that the old man has stepped on in the morning, and the shoe prints of the murderer...... I can't collect it. ”

Lao Bai squatted outside the wall directly opposite the corpse, carefully observing and analyzing.

Yang Sen also discovered this, thinking that this construction site was inaccessible, the other party threw corpses here, and there was snow on the ground, so there would be clues such as footprints.

However, this side of the fence is adjacent to a small amusement park, and many residents of the neighborhood who are exercising in the morning walk nearby.

The snow under the wall has long been trampled so tightly that there is no possibility of leaving footprints.

Of course, it is not that there are no traces at all, even if the snow is trampled on tightly, as long as there is no ice, people will step on it, and there will be footprints left behind.

At half past one o'clock in the afternoon, the investigation and forensic work had been completed.

The body had been loaded onto the car, and except for the members of the action team who were investigating nearby, the others returned to the criminal investigation detachment one after another.

In the car, Shen Yan's frozen cheeks were red, and her hands kept rubbing.

At the end of December, the temperature in Haizhou was already more than ten degrees below zero.

After three or four hours outside, they were already freezing.

Fortunately, the car has been starting, and the heating effect of the air conditioner is okay.

"Has the deceased been identified?"

This time, Yang Sen was very considerate of Lu Chuan and took on the task of driving, and in the back seat box, Lu Chuan and Shen Yan sat side by side.

In the current survey of the professional car, there is more equipment inside, and there is no separate seat, only in the middle of the equipment wall, two long chairs are added.

Squeeze in and sit down four people.

The front driver and co-pilot can also seat two people, a total of six people.

Liu Guodong and Wang Changjiang wanted to report to Qin Yong on the current investigation and preliminary autopsy, and sat in Qin Yong's new car.

In the current survey car, there are only three people left: Lao Bai, Lu Chuan and Shen Yan.

Lao Bai is now sitting in the co-pilot, and only Lu Chuan and Shen Yan are left in the back compartment.

"Probably not yet."

Lu Chuan shook his head: "I just heard Zhang Hui say that the investigation of nearby residents is not very good, and no one knows the deceased." ”

"I'll have to go back and compare my fingerprints and see if I can find anything."

Article 1 of the investigation of the homicide case is to confirm the identity of the deceased.

Without this premise, nothing else is possible.

Fortunately, the corpse died for a short time and was frozen outdoors, so it was much easier to collect fingerprints than Lu Chuan's last time to collect fingerprints from the sunken corpse in the reservoir.

After returning to the criminal investigation detachment, Qin Yong's side immediately held a case analysis meeting.

Lu Chuan's side also began to compare the fingerprints of the deceased.

As for the autopsy, it is not possible yet, the corpse is still frozen and hard, and the autopsy can only be carried out after the corpse has softened.

The fingerprint comparison work continued smoothly, but the results were far from satisfactory.

"Master, there is no fingerprint information of the deceased in the fingerprint bank."

Liu Guodong frowned, there is no fingerprint information storage, which means that the deceased has not collected fingerprints before, at least in Haizhou City, in this case, the probability of not being a local is greater.

In addition, there were no reports of missing persons in the past two days, and there were no results in physiognomy comparisons, and the deceased was not in the missing persons vault.

"What's next?"

Some people died, but not completely......