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

Chapter 108 Site Investigation
December 28, 28:[-] am.

The weather is cold and the temperature is not high.

The construction site of Qinghe Amusement Park.

The police from the Qinghe Road Police Station have already begun to set up a cordon at the scene.

The report was made by the security personnel at the construction site, an old man in his 60s.

The second action team has arrived at the scene first and is questioning the reporter, and Zhang Hui is in charge.

"It's winter now, the construction has stopped, and I'm the only one watching on the construction site."

The old man's name was Zhang Fugui, and he didn't have the fear and anxiety as imagined, nor did he feel nervous at all.

"Are you not nervous when you see the dead body?"

"What are you nervous about? I've seen corpses in funeral parlors before, but I haven't seen any corpses."

Zhang Fugui smoked low-quality cigarettes, his eyes didn't fluctuate, he just narrated plainly.

Lu Chuan drove the survey professional car, carrying Liu Guodong, Yang Sen, Lao Bai, Wang Changjiang, and Shen Yan at the end of the convoy.

The scene was well protected, no one came except Zhang Fugui who found the body.

Qin Yong is learning about the basic situation, but currently there is only some information provided by Zhang Fugui.

Qinghe Amusement Park is an amusement park under construction, and there are few people around. Except for a surveillance camera at the gate, Zhang Fugui is the only person in the entire site.

"Old Liu, you enter first."

Liu Guodong nodded and led Lu Chuan into the scene.

The place where the body was dumped was about 700 meters east of the main gate, on the edge of a fence near the woods.

In Haizhou in December, there have been several heavy snowfalls, and the places without artificial snow removal have been covered by snow.

Putting on three layers of rubber gloves, Lu Chuan picked up the survey box and followed Liu Guodong into the scene.

Later, Yang Sen and Lao Bai went to the outside of the wall to conduct a survey.

Wang Changjiang and Shen Yan are also ready to inspect the corpse after Lu Chuan and the others finish surveying the footprints and taking pictures.

"Master, look at this."

At the scene, a naked female corpse was lying flat on the snow in a large font.

There were obvious scratches on the skin, and the blood dripped on the white snow, which was extremely dazzling.

Lu Chuan pointed to the obvious scratches on the wall, indicating that the murderer should have pushed the body over from the other side of the wall.

The height of the fence is about two meters, and it is a temporary fence composed of iron plates surrounded by green covering nets.

There were no footprints around the body, and ten meters away was the narrow path that Zhang Fugui walked out on patrol every day.

"First take pictures, then collect blood on the snow."

Lu Chuan nodded and started to set up the camera.

Lu Chuan preferred to take azimuth photography, mainly to record and fix the position of the scene in the surrounding environment and the conditions of the surrounding environment.

Specific to this scene, it is the specific position of the corpse in the entire visible scene.

Compared with detailed photography, azimuth photography has a larger shooting range, and Lu Chuan uses a wide-angle lens plus continuous shooting.

Basic field survey and photographing skills make it easy to do these things.

The next step is overview photography, also called panorama photography. Compared with azimuth photography, overview photography focuses on the corpse, and captures the positional relationship between the corpse and the wall, and the positional relationship between the surrounding trees.

This time, Lu Chuan took pictures facing each other, taking pictures in multiple directions and taking pictures in turn.

Next, Lu Chuan took macro shots, mainly of bloodstain residues on the snow.

For this step of shooting, Lu Chuan changed the lens of the camera again.

There is a certain difference between macro shooting and general shooting. In most cases, the effect of shooting with a fixed focal length lens is better.

In the past, a special camera was used for macro shooting, and a "close-up add-on" was required.

Examples include bellows extenders, macro extension rings, or half-length mirrors.

The scene was relatively simple. After discovering the body, Zhang Fugui didn't go forward to check it at all, and called the police directly.

Therefore, the situation inside the wall is simple and clear.

Wang Changjiang and Shen Yan also approached the corpse for preliminary autopsy.

Wang Changjiang is in charge of inspection, and Shen Yan is in charge of recording.

"There were obvious bleeding points on the neck of the corpse and choke marks on both hands. It was preliminarily judged that the cause of death was mechanical asphyxiation."

Lu Chuan followed, and while Wang Changjiang checked the corpse form, he was also making some records.

Lu Chuan, who has mastered intermediate-level field survey skills, also has some understanding of some basic forensic science knowledge.

For example, the choke mark on the neck that Wang Changjiang just mentioned, it was judged that the death was caused by mechanical suffocation, but he was actually strangled to death.

Human life is very fragile. If you want to kill a person, as long as you master the correct technique, you can kill him with just one finger.

Human life is also tenacious. If you don't know the methods and techniques, even stabbing dozens of knives may not kill you.

Strangling is one of the most common ways of killing people.

However, it is not easy to complete the strangulation successfully.

Death by strangulation is actually by controlling blood flow in the carotid arteries to achieve cerebral ischemia and cause death.

If you want to hinder the return of blood in the neck of an adult, you must exert a force of at least two kilograms on the neck.

And when this value reaches more than [-] kg, the common carotid artery will be completely atresia.

However, this strength is only to block the superficial artery of the neck, and it is not enough to cause death.

In the neck of the human body, in addition to the common carotid artery that supplies blood to the brain, there are also vertebral arteries that also supply blood to the brain.

Only when all the common carotid and vertebral arteries are blocked can the brain be completely hypoxic.

The pressure that can make adult vertebral artery atresia is [-] kg.

And it must be maintained for more than 5 minutes to cause brain death.

This is why, after a person is strangled, there will be clear marks on the neck.

A force of at least 5 kilograms for more than [-] minutes will definitely cause local bleeding on the skin and form choke marks.

Of course, strangulation can be judged not only by the marks on the skin of the neck, but also by the hyoid bone.

The strangled victim desperately resists and desperately wants to breathe. During the struggle, the hyoid bone will break.

Therefore, in the identification and analysis of the bones, the fracture of the hyoid bone can basically determine that the deceased died of strangulation during his lifetime.

However, nothing is absolute, and the fracture of the hyoid bone can only be accurately judged by looking at the specific fracture marks.

Wang Changjiang continued to observe and judge: "Death time..."

In the current survey, the time of death of the deceased is generally judged by the degree of rigor and the temperature of the corpse.

Immediately after a person dies, the production of heat in the body ceases, and the body cold begins.

The so-called corpse cold means that in most cases, the temperature of the corpse will be higher than the ambient temperature.

Based on the principle of heat diffusion, the heat of the corpse will continue to spread to the surrounding environment until the temperature of the two reaches the same temperature.

Regarding the reduction of body temperature, it is different in different seasons, different regions, and different clothing conditions.

For example, in the spring and autumn seasons, the dead body of an adult is in the indoor air, and the temperature drops by less than one degree Celsius per hour.

But in water, the body temperature may drop by three to five degrees Celsius every hour.

However, if it is outdoors in high temperature in summer, the temperature of the human body may rise in a short time after death.

Regarding the temperature of the corpse, some experts have done special research. Among the intermediate surveying skills obtained by Lu Chuan, there are only some skill applications, but there is no corresponding process.

"The corpse has been frozen, and the temperature and the degree of rigor are of little reference value, but judging from the color of the skin, the death time of the deceased is most likely not more than a week."

(End of this chapter)