It was a rainy night, and we received a report saying that when he was going home after working overtime, he found a naked body in the garden downstairs of the company.
We rushed to the scene as soon as we received the call.
This is the most famous local medical research institute. When we arrived at the scene, it was already early in the morning and the rain was still increasing. Looking up, we saw that there were still lights on in many rooms in this ten-story building.
The body was found in a roadside garden. As for why the reporter found him, according to his later description, he was holding the office garbage in his hand and wanted to throw it into the trash can downstairs, and the body happened to be there. Not far from the trash can, when he was throwing out the trash, he first saw a human leg. He thought it was someone who was drunk and fell here, so he thought about going up to take a look, but he didn't expect that when he got there, he saw a human leg. It was found that this person had rigor mortis.
Because he is from the Medical Research Institute, he has learned a lot about it. Judging whether a person is dead is not a problem for him. In addition, the corpse is rigor mortis, so it is obvious that ordinary people can know that the person is dead. So he called us immediately.
"Old Wang, why are the corpses found in many cases on rainy nights?" I turned around and asked Wang Zhiyi, who was observing the corpses and telling me about the first case of "serial murder".
"Why else? Haven't you watched some criminal investigation dramas? When it rains, heavy rain will wash away traces of the crime. At the same time, not many people will go out on rainy days, which makes it less difficult for people to find the body. . But then again, this undoubtedly adds a lot of trouble to our police."
"Then how was the body discovered for the first time determined and what was the cause of death?"
As for the cause of death of the corpse, our forensic doctors have been making judgments for a long time. At first, no wounds were found on the corpse, only a few bruises. The cause of death of this corpse is much more difficult to determine than the cause of death of a corpse with external wounds, and since there are no wounds, we It is also impossible to judge whether the deceased committed suicide or homicide by observing the wound.
Later, based on the bruising on the lips, ears and limbs of the corpse, the forensic doctor initially determined that the corpse was allergic to penicillin. However, during the autopsy, it was found that there were bubbles in the small blood vessels on the surface of the heart, and bubbles overflowed from the puncture hole in the heart. Characteristics such as bloody foam and intracerebral hemorrhage determined that the corpse's true cause of death was air embolism.
That is to say, death by air injection. This method of death may seem much calmer in terms of cruelty than death caused by external impact.
The lethal volume of air embolism is 100~150ml, and this corpse died precisely because the amount of injected air reached the maximum.
In fact, very few people know about this method of death. Except for people with a medical background, others basically have no understanding of this aspect.
"Why does injecting air kill people?" I asked.
"Well, this touches my blind spot. You have to ask our forensic doctor Li about this." Li An, who was examining the corpse, was suddenly called by name.
"Brother! We are checking the body. You are very good at calling people by their names!!!"
"No, you are already a forensic doctor. Why do you still believe in ghosts and monsters? You must put an end to feudal superstition." Wang Zhiyi said
"Fuck you uncle, you don't have to believe it, but I have to believe it. After all, there are so many undead waiting for my autopsy report to know how they died."
"Why are you so excited? How's the autopsy going?"
"The two corpses from that meeting two years ago are probably the same murderer. The method of death should be the same as expected. Besides, the velvet flowers are not obvious enough."
"First tell Yang Yaozu why overdose of air injection can lead to death. This person has to ask me why."
"Why, Officer Yang, are you changing your career to forensic medicine??"
"No, just out of curiosity. Will just injecting air cause death?"
"Then you think that under normal circumstances, the amount of air that human blood can dissolve is limited. If a large amount of air enters the blood circulation very quickly in a short period of time, it will cause air embolism. After the air enters the veins, it will arrive with the blood flow. Right heart, after the air enters the right heart, due to the continuous beating of the heart, the air and the blood in the heart are stirred into a large amount of foam like in a blender. Under the contraction and contraction of the heart, bubble-like blood containing countless small bubbles is formed. It enters under the pumping action of the right heart and blocks the right ventricular outflow tract and pulmonary artery opening. It is very difficult to be discharged, so it stays like garbage and occupies the limited space in the right ventricle, seriously hindering blood return and pulmonary artery. Output further puts the blood throughout the body in a state of stasis and strike, and the amount of blood pumped by the right heart to the pulmonary artery drops sharply. But not all air bubbles are blocked there, there will always be some air running out, and this part is exiled On the one hand, the molecules may cause organ embolism; on the other hand, these bubbles will have a special stimulating effect on platelets, causing them to release something called serotonin. Under his influence, blood vessels will have a constrictive effect. At the same time, platelets Factors will also promote thrombus in contracted blood vessels, further deepening the degree of embolism. The pathological mechanism of this series leads to a high probability that the deceased will eventually die of acute right heart failure or acute respiratory and circulatory failure. Death usually comes very quickly. I think , I’ve said so much, you probably can’t understand a word of it, but in short, air injection will definitely cause death when it reaches a certain amount.”
I never thought there could be such a way to die.
"What is this velvet flower?" I asked Wang Zhidao as I picked up the velvet flower in the bag.
This velvet flower was found at the first corpse dumping site. At first, we didn't find anything symbolic around the corpse until we found something a few meters away from the corpse. It was laid out on a bed at that time. On a piece of newspaper, it looks particularly beautiful under the illumination of the street lamp. It can be seen that this thing is not still here casually, as if it has been placed here safe and sound. In fact, this is like some murderers like to leave corpses after committing crimes. Put some strange things around or at the crime scene to symbolize yourself. This is also a provocation to our police. We classified the velvet flower as a suspicious object at the first corpse dumping scene. A month later We received a report that a body was found next to a rubbish bin in another garden.
After we passed there, we realized the seriousness of the matter, because the corpse looked exactly the same as the first corpse we found, and when our people found the velvet flower not far away, we were even more sure, If nothing else, the murderer of these two corpses should be the same.
In the past few months, we have obtained the identities of the corpses from the police station, and then contacted the families. We were surprised to find that the two corpses were orphans, and they grew up in the same orphanage.
We then went to their orphanage at the time to confirm their identities.
The dean was also very surprised by the death of these two people, because the dean said that these two children were the most well-behaved when they were in the orphanage and basically didn’t cry much. But it was also because they were so well-behaved that no one Adopt them, so these two children are also the ones who spend the longest time with him.
We also found many people based on the clues provided by the dean, but they all felt as incredible as the dean about the deaths of these two people, because their friends believed that they had never had any conflicts with anyone, let alone that they could cause trouble. Contradictions in the upper body.
So our clues have been intermittent all this time, and none of them can be connected together.
"Xiao Wang, look at what day it is today." Zhang Kai, who was standing behind him, suddenly said.
"Team Zhang, it's No. 20, exactly the same time as the first two corpses were found!"
"Damn, this case is getting more and more difficult to handle. How is it going at the scene? Is there anything different from the previous two?"
Wang Zhiyi shook his head.
"The scene where the corpse was dumped was not in the garden!" said a colleague standing nearby.
"You think I can't see it!" As expected, everyone scolded this man when he became irritable.
Unexpectedly, this was the first day I officially joined the police force and I encountered such a thing. I don’t know if it was God’s test for me. Generally speaking, my newly stable days have come to an end.
