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

Chapter 203 Seven people

Qin Hui, Wu Qiming, Wang Ruiqing and other members of the QZ City Criminal Investigation Detachment stayed up all night.

On the edge of the ruins of the ruined Minghe Bridge, Li Donglin supervised the battle for one night.

The leaders of the provinces and departments supervised the battle, and all resources were sent to the scene as soon as possible.

The emergency lighting vehicle illuminated the entire scene as if it were daytime.

More than 30 fire emergency fighters worked in turns, using a small hand-held blasting hammer to knock on the concrete of the bridge pier little by little. After nearly [-] hours, all the bones were finally cleared out when it was daylight the next day.

However, no one was a little excited to finish the work, but everyone's heart sank to the bottom.

In the first pier, four skeletons were unearthed.

In the second pier, three skeletons were unearthed.

A bridge over 100 meters long, with [-] piers, seven skeletons were unearthed!
The weather in early spring is still cold, and the chill blows into everyone's heart.

"Block the scene and send the skeleton back to the detachment."

QZ City Criminal Investigation Detachment, Forensic Laboratory.

Lu Chuan and others slept for a while last night, and they are in a good state of mind now.

However, facing the seven skeletons, his face was also very ugly.

Let's not talk about who these people are and how they died, but let's talk about seven people!

Back then there was no news at all!

How can it be?

The skeleton was completely excavated, and the most important thing is to confirm the identity of the skeleton.

The first is to determine the cause of death of the deceased.

"Skeleton No. [-], the fourth rib on the left rib was scratched with a sharp object, and the cause of death was preliminarily judged that the sharp object pierced the heart..."

"No cement residue was found in the brain cavity of the No. [-] skeleton, which was poured into the cement pier after death."

"Skeleton No. [-], with a comminuted fracture of the right leg bone, dislocation fracture of the left arm, fracture of the third and fourth ribs of the left rib, and traces of bone cracks in the seventh rib of the right rib."

"Hyoid bone broken, suffocation death..."

"Skeleton No. [-] has a fractured skull, a broken neck, a fractured sixth rib in the left rib, and a dislocation fracture of the tibia in the left leg."

"Skeleton No. [-]'s right arm is percussively fractured..."

The students who can come out with Zhang Yuanchao are said to be students, but their forensic level is actually higher than that of many grassroots forensic doctors.

There is theoretical knowledge about the more complex bone identification and analysis, but there is a lot of lack of practical experience.

But these people had no problem doing ordinary skeletal injury identification.

Every skeleton has injuries, and most of these injuries can directly determine the cause of death.

For example, the hyoid bone is broken. Under normal circumstances, the hyoid bone will form a separate individual after the corpse is ossified.

In the absence of external damage, there is a high probability that it will not break.

Therefore, generally speaking, as long as the hyoid bone is broken in the skeleton, it can basically be judged as suffocation death.

The other corpses also basically had obvious bone scars.

The seven corpses can be clearly judged from the injuries of the bones. They have all experienced different degrees of abuse and injury before their death.

This basically ruled out the possibility of accidental death and hidden corpses.

In addition, three of the seven people were poured into the pier while they were still alive.

The other four were poured into the pier after losing their vital signs.

The most important task of forensic medicine and current investigation is to determine the identity of the victim through technical means.

The cause of death has basically been confirmed. The DNA extraction of the bones was done by Zhang Yuanchao's students, and Lu Chuan was responsible for determining the exact time of death of the seven people.

The skeletonization of the corpse, in different external environments, the time of skeletonization is very different.

In a high-temperature, high-humidity natural environment, without external factors such as the bite of wild animals, the bone will turn into bones in half a month at the earliest.

For example, in the tropical rainforest, after the death of the human body, one day later, before the rigor has completely disappeared, it has already begun to decay.

After three days, the complete form of giant view phenomenon will be formed.

After a week, the muscle will have decayed and dissolved, leaving only the skin covering the surface of the corpse.

After ten to fifteen days, the parasitic flies inside the corpse will completely digest the corpse, leaving only gray and black bones.

In the process of weathering, the gray-black bones will gradually turn snow-white.

Generally speaking, the whiter the human bones, the longer the time of death.

However, it is impossible to accurately know the time of ossification only by the color.

Lu Chuan still needs to do some experiments.

The concrete used to build bridge piers is different from ordinary concrete.

There are many grades of concrete, and the application occasions are different according to the nature of the project.

The cement label is the strength index of cement, which measures the firmness of cement after it is stirred and hardened.

There are many factors that affect the strength of cement, such as the mineral composition in cement, particle size, temperature and humidity when hardening, and so on.

The cement used for the piers of the Minghe Bridge is low-temperature portland cement, which has better water resistance than ordinary portland cement.

The corpse was sealed in during the cement canning process.

After 15 years, the corpses inside have completely turned into bones, but the exact time of death is still unclear, especially the four corpses that died when they were sealed.

The experiment was very simple. Lu Chuan wrapped a chicken leg with cotton cloth, and used the same cement as before to encapsulate it.

Then by adding some chemicals, simulate 15 years of change.

This depends entirely on experience. There are opinions about what substances to add and how much to simulate the 15-year time change.

When Kan was busy here, the first-line criminal police of the QZ City Criminal Investigation Detachment were not idle either.

The winning bidder for the construction of the Minghe Bridge that year was the QZ First Bridge Construction Group Company, and the engineering construction unit was its subsidiary Highway and Bridge Construction Company.

The Minghe Bridge was a key project in QZ City at that time, and the relevant project materials are very complete.

15 years, although the time is not short, but it is not enough to change things.

Those who were in charge of the project were arrested one by one.

There are also workers who were responsible for pouring concrete back then, and they are also searching, and they are focusing on searching.

After the concrete pouring is completed, it needs to be vibrated, especially the vibration of bridge piers, which is extremely demanding and must not have any construction defects.

After the maintenance is completed, professional quality inspection is required.

So, the corpse was poured into the pier, how did it pass the acceptance?
Is the worker in charge of the vibration one of the murderers?

The reason for saying one is because there were seven dead people, and when the pier was poured, it could not be interrupted.

In other words, the four corpses and three corpses in the two piers where the corpses were found were at least watered at the same time.

It cannot be done by one person.

Because the project is continuing, it requires the coordination of multiple types of work.

The arrest work and the interrogation work are carried out at the same time.

(End of this chapter)