Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

Chapter 109 Circumferential Radiation
The color of the skin of the corpse is also one of the important indicators for judging the time of death of the corpse.

Generally speaking, the corpse will keep its original color unchanged for a short time after death.

But over time, the color of the corpse will slowly change.

Under non-frozen conditions, the general color of the corpse will change over time, going through cyanosis, light red, brownish yellow, sallow, light green, dark green or even black green.

In the absence of external intervention, the view of giants will eventually appear, followed by corruption, and then bones.

In the case of freezing, the color change of the corpse is different, the process of bruising will be slower, and when the temperature is low enough, there will be no subsequent changes in corruption.

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

The dead body at the scene had been completely frozen, and it was impossible to judge the death time of the dead body based on the degree of dead body in this case.

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

The death within a week given by Wang Changjiang is a relatively conservative estimate.

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

However, the scene where the body was found not only had a dead body, but also spots of blood.

Wang Changjiang continued to give a further estimate of the time of death: "There are spots of blood on the snow, which shows that the murderer did not stiffen the body when he threw it away. Otherwise, there would not be blood dripping after the wall was scratched."

"Combined with the analysis of this situation, the time of death of the deceased should not exceed 48 hours."

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

The time of death is within 48 hours.

The current survey and photographing, the preliminary examination of the corpse, and the collection of bloodstains have all been completed.

Liu Guodong packed up the survey equipment, and looked around the corpse in a circle: "Xiao Lu, I will walk according to the outer spiral first, and you can walk once according to the inner spiral."

Lu Chuan nodded. On-site inspections are not just about taking pictures of the scene and collecting physical evidence.

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

Common survey search methods include linear search, grid search, area search and circular radial search.

Generally speaking, straight-line search is widely used in outdoor types of scenes, and criminal police are commonly known as stroking the tape.

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

Grid searches target indoor scenes and are often used for smaller, complex crime scene searches.

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

In this way, after searching a plane, such as the north-south plane, start another orientation at the end point of the search, that is, continue searching in the same search mode of the east-west plane.

This method is the most systematic and thorough, like a cat arching its back ready to catch a mouse, cautious and meticulous.

And the area search method is that many people continue to search a larger area.

For example, in the search of Jiguanshan, police dogs were dispatched, and hundreds of policemen were involved in the 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 who are currently investigating are searching in circles.

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

There is also a kind of internal spiral, which starts from the corpse and searches outward in circles.

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

While the inside of the fence is busy, the survey outside the fence is also going on.

However, judging from the faces of Yang Sen and Lao Bai, it was clear that the gains were not too great.

"There is a small path trampled by the old man doing morning exercises on the side of the wall. The murderer's shoe prints... can't be collected."

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

Yang Sen also discovered this. He thought that this construction site was inaccessible. The other party dumped the body here, and the ground was covered with snow. No matter what, they would leave footprints and other clues.

However, the wall on this side is adjacent to a small amusement park, and many residents who do morning exercises nearby walk nearby.

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

Of course, it's not that there are no traces at all. No matter how tightly the snow is trampled, as long as it is not frozen, there will be footprints left when people step on it.

At 01:30 noon, the current survey and forensic work have been completed.

The corpses had been loaded into 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 Yandong's cheeks were flushed, and she kept rubbing her hands.

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

Everyone stayed outside for three or four hours, and they were already frozen through.

Fortunately, the car has been started, and the heating effect of the air conditioner is not bad.

"Has the identity of the deceased been confirmed?"

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

The professional car currently being surveyed has a lot of equipment inside, and there are no separate seats, only two long chairs are added in the middle of the equipment wall.

Squeeze to seat four people.

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

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

In the survey car, only Lao Bai, Lu Chuan and Shen Yan were left.

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

"Probably not yet."

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

"I have to go back and compare the fingerprints to see if I can find anything."

The first thing to do in murder cases is to confirm the identity of the deceased.

Without this premise, nothing else can be discussed.

Fortunately, the death time of the corpse was short, and it was frozen outdoors. It was much easier to collect fingerprints than Lu Chuan collected fingerprints from the sinking corpse in the reservoir last time.

After returning to the Criminal Investigation Detachment, Qin Yong immediately held a case analysis meeting.

Lu Chuan also started to compare the fingerprints of the deceased.

As for the autopsy, it is not possible now, the body is still frozen hard, and the autopsy can only be performed after the body softens.

The work of fingerprint comparison continued smoothly, but the result was far from ideal.

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

Liu Guodong frowned. There was no storage of fingerprint information, which meant that the deceased had never collected fingerprints before, at least not in Haizhou City. In this case, the probability of not being a local was higher.

In addition, there have been no missing persons reports in the past two days, and the comparison of appearances has not yielded results. The deceased is not in the missing persons library.

"What are your next thoughts?"

(End of this chapter)