Yu Zhehao hanged himself in his living room, and it was his younger brother Yu Zhehan who called the police.

Lin Zifan is taking a record from Yu Zhehan and seriously investigating and questioning.

"You mean, he was drinking with his friends last night?" Lin Zifan suddenly asked him.

Yu Zhehan hurriedly shook his head and explained, "No, when I called him last night, he was still at home. Recently, he had some health problems, and the doctor told him to rest more, so he didn't go out to drink for a while. ”

Lin Zifan let out a faint "oh" and continued to record in the notebook.

Later, he asked, "Did your brother contact you before he hanged himself?" Or did he leave anything behind? ”

Yu Zhehan thought for a moment and said slowly: "No, I didn't know that he was going to commit suicide, when I opened the door today, that's it......"

Yu Zhehan's mood is very unstable, and he can't accept the fact that his brother hanged himself, but when he answers questions, his mind is still relatively clear.

"Where do you live? Is this house your brother's? Lin Zifan paused and asked again.

Yu Zhehan looked at Lin Zifan and said quietly: "My father gave each of us brothers one million, and my brother used the money to buy this house and a car. I used some of the money to buy a house in the old town of Ningzhou City, and saved the rest of the money, so the two of us were far apart, but we kept in touch and saw each other often. ”

Lin Zifan nodded and closed the notebook in his hand: "Later, I need you to go to the bureau with us to collect fingerprint information, and we still have some things to cooperate with you in the investigation." ”

Yu Zhehan nodded, indicating that he would fully cooperate.

Subsequently, he asked Lin Zifan weakly: "Why did my brother commit suicide?" ”

Lin Zifan smiled faintly and explained: "The case is still under further investigation, you can wait for the results." ”

Just when Lin Zifan took a record from Yu Zhehan, the technical team was investigating the scene, and the forensic doctor was also examining the body.

"This crystal chandelier is really sturdy." Ren Qiushi stood on the side of the coffee table, looking up at the three-layer crystal chandelier on the roof of the shed, as well as the corpse on the chandelier.

"Visually, the deceased was at least 160 pounds, and the chandelier was indeed very strong." Zeng Lan looked at the corpse and said lightly.

The technical team has taken photographs of the vicinity of the deceased, as well as the fixation of traces.

After the technical team left, I walked forward slowly, picked up the plastic bench with all four feet facing the sky on the ground, and placed it on the coffee table, that is, at the feet of the deceased.

"What are you doing here?" Ren Qiushi asked me a little strangely.

I smiled slightly and explained: "In film and television dramas, there are often hanging scenes where he kills and disguises himself as suicide, and the biggest flaw is that the height of the stool is not enough at all, so I measure it." ”

Then, I looked at the plastic bench in front of me, and the height was exactly the same as the soles of the deceased's feet, so it was in line with the situation when the deceased hanged himself and kicked over the plastic bench.

Ren Qiushi looked at me, and his expression suddenly became a little solemn: "I feel that you are insulting our forensic profession. ”

I looked at his somewhat aggrieved expression and said casually: "I'm not insulting the profession of forensic medicine, I'm just insulting you, hahaha." ”

Ren Qiushi glanced at me angrily, and said in a deep voice: "The height of the plastic bench can only be used as an aid, to really determine whether the deceased committed suicide or homicide, an autopsy is required to find out if there are other suspicious wounds on the deceased's body." ”

"If he kills, it's not a trivial matter to drop a person of one hundred and sixty pounds on the crystal lamp. And whether this crystal lamp can bear the load, I don't know. Zeng Lan nodded and agreed.

"Let's take the body down first." Ren Qiushi looked up and said seriously.

Subsequently, several criminal police officers stepped forward together, and on the premise of keeping the knot of the rope intact, the rope was cut, and the body was carried to the floor of the living room, and the forensic doctor carried out the preliminary autopsy work on the scene.

Death by hanging, which accounts for a certain proportion of deaths, is also a common phenomenon that causes unnatural death.

The so-called mechanical asphyxia is the death caused by the lack of oxygen in the brain, spleen, blood and other important organs of the human body and other causes caused by the lack of oxygen and other causes caused by the deceased's breathing under external force, inhibiting the breathing of the neck, blocking the trachea, and causing the exhaust gas such as carbon dioxide in the alveoli of the human body and the difficulty of inhaling oxygen and other gases.

To put it bluntly, it is to cause the deceased's trachea to be blocked, it is difficult to exchange gases freely, and finally suffocate to death.

For criminal cases, determining whether the deceased was hanged before death or hanged after death, that is, whether the deceased was spilled or strangled to death is the biggest problem facing the forensic doctor, and it needs to be verified from many aspects.

Ren Qiushi first picked up the rope used by the deceased to hang himself and carefully examined it, this was a very ordinary nylon rope, he held the nylon rope and carefully compared it with the ditch around the neck of the deceased.

"The knot is a very common dead knot, and there is no way to judge the murderer's profession by tying the knot." Ren Qiushi said lightly.

"The ditch is deeper, the surrounding bloodshot is more obvious, and the leather can be clearly seen, and it seems that the time of death is not short." Zeng Lan said lightly.

In the living state of the human body, all organs and tissues of the body contain a certain amount of water. After the death of the human body, the ability to take in water is lost, the blood circulation is stopped, the water lost by evaporation cannot be replenished, and the water evaporates rapidly from the thinner parts of the skin of the corpse and the exfoliation of the epidermis, and the local dryness is waxy yellow, yellowish brown or dark brown, and the texture becomes hard, which is called leather-like, also called local drying.

Ren Qiushi carefully inspected the ditch on the deceased's neck: "There is only one ditch, it seems that there is only this rope." ”

"The head and face of the deceased were impaired with blood circulation, which led to blood stasis and capillary stasis. At the same time, the lack of oxygen in the blood vessel wall causes damage to the internal epithelial cells, and the endothelial cells enlarge, so that the capillaries expand and cause blood cells to exude, and some speckled black spots can be seen in the eyelid area. Ren Qiushi gently opened the eyelids of the deceased and said lightly.

Zeng Lan nodded and continued: "There are traces of blood flowing from the mouth and nose of the deceased, accompanied by nasal discharge. ”

"This occurs at the tip of the nose because of the mucous membrane and thin cell wall, and in hanging, the rope compresses the vagus nerve in the neck, and the superior laryngeal nerve stimulates the hyperactive secretion of the nasal gland." Ren Qiushi explained it from the perspective of forensic science.

Then, he glanced at the puddle of pale yellow liquid on the coffee table......