Chapter 2 Chapter two

I couldn't help feeling sorry for myself, it's not a pleasant thing to be yelled at in the middle of the night, not to mention that the scene was so severely damaged.The policeman who was in charge of inspecting the scene walked around, took a few photos, and hid aside in less than 3 minutes. Only a few auxiliary policemen were maintaining order, but I had to hold this arm and carefully inspect the scene. I watched it over and over again, as if I got some treasure. Who made me a forensic doctor?My larynx moved vigorously, finally suppressing the acid water in my stomach, and refocusing on this arm.

There was no doubt that it was a human arm.Even if you haven't studied medicine, you can tell from the skin color and shape, but out of caution, I turned my arm over and looked at the thenar—the place where the muscle under our thumb bulges: this is a human body. As a symbol of the spirit of all things, not even our closest cousins, the gorillas, have such flexible thumbs. I'm not bored: I've seen things like this where common people report crimes with a pair of pigs in the water, and they think it's a human.We encounter one or two similar cases every year.The worst thing was that once an old man came to report the crime with chicken intestines.He said that he had checked the book several times, and he was sure it was the appendix and cecum, and he was so nervous that he wanted to see us finish the test before leaving.Every time I think about it, I am so depressed that I can't speak for a long time, and I have slandered people who only eat chicken but not chicken intestines hundreds of times.Hundreds of millions of broiler chickens are consumed in China every year. If everyone does not eat chicken intestines like you, even if only one percent of them are reported to the police, that would be a big deal.Isn't this intentional to keep us from living?

Judging from the slenderness and roundness of the limbs, I feel that this should be a woman's arm. The nail polish that has not come off cleanly confirms my idea, but I still decide to go back and check the Y chromosome.These days, who said that nail polish is a patent for women? "Pseudo-mother", a wonderful flower in the history of human gender, is not limited to Thailand and Japan. I dare not judge people by their appearance. When it comes to chromosomal dna, everyone will feel that they don’t know how mysterious it is. In fact, the truth is extremely simple: a person’s sex is determined by a pair of chromosomes, which we call sex chromosomes. This pair of chromosomes has two arms. If both arms are x, then you are female, and if both arms are xy, then you are male.Both the egg and the sperm have only half of the chromosomes at the time of childbearing. Since the female sex chromosome is xx, the sex chromosomes carried by the egg are x anyway, and the male sperm may have two types of x and y. If it is x If the sperm combines with the egg, the result is xx, then a girl is born, and if the y sperm combines with the egg, the resulting xy is a boy.

Sometimes you have to admire the wonders of nature. The first result of this rule is that the proportion of men and women is 50%. If it is not like this, God knows what troubles will happen; The elders of the book made a black humor: having boys and girls has nothing to do with women. This rule also brings us a convenience: if you want to know whether it is a man or a woman, you only need to test the y chromosome. If you have y, you are a man; if you don’t, you are a woman.This is more accurate and reliable than looking directly at the appearance.Judging by the appearance, if you are unlucky, you may encounter developmental deformities and sex reassignment surgery.

I brought the arm closer, ready to see a little more. Having looked at the arm again from top to bottom, I'm pretty sure it's not a hospital job either.Such bad things have happened before. A hospital contracted some cut off organs, stumps and broken arms to a crematorium for processing. The unscrupulous crematorium actually dragged these things to the mountain in order to save two fuel money. Once buried.This shitty incident became a sensational big news, which kept us forensic doctors busy for a long time.What's even more frustrating is that you have nothing to do with them except for fines.We have also consulted lawyers about this matter, but no one can tell which article of the criminal law the crematorium has violated.

And there was nothing wrong with this arm that was worth amputating: no hospital would amputate a good arm.Not only did I not see the trace of surgical disinfection, but the shape of the broken end was also wrong: if it was surgical resection, the incision would be designed in the shape of a fish mouth, that is to say, there is a protrusion on the upper and lower skin, so that the wound can be wrapped up , The exposed stump is a taboo in surgery. There is no doubt that this is a criminal case. Still have to take a closer look. I separated several fingers from the stump and examined the palm carefully.If it is said that when a person is alive, the eyes are the easiest to reveal the secret of the owner, then when a person is dead, it is the hands that are the easiest to reveal the secret of the owner, especially the right hand.The calluses of manual workers are on the palm closest to the fingers; the calluses of mental workers run between the index finger and middle finger, and the end of the middle finger of people who often hold a pen will be biased towards the little finger; It is worn by the strings; people who drive often, such as professional drivers, usually have thicker calluses on their right hands than their left hands (due to the need to shift gears frequently), and usually only have two or three fingers of the right hand and There are calluses on the corresponding part of the palm.

If you are lucky, the carpenter will have wood thorns on his hands, and the workers will have oil stains on their hands. I can't see what this guy does at all. Does she (he) neither do physical work nor wield a pen?envious.Or is she (he) left-handed?I have no idea. I dropped the stump again, and brought the severed end in front of me. The ends are neat.No, it's too tidy.But this kind of neatness is different from those encountered in industrial accidents. I have also seen bloody scenes where a paper knife cut off a worker's entire arm, but such a knife would cut off even the bones neatly, and this one But not: the uppermost round joint head of the humerus (upper arm bone) was not damaged in any way.

Butcher, cook and doctor.The content in the textbook immediately appeared in my mind.The reason why murderers of these three professions show great skill in dismembering corpses is that they have brought professional habits into their crimes.Butchers’ knives are the heaviest, and they often have the habit of chopping hard; chefs’ knives are lighter, and they often have the habit of cutting back and forth; How many knives make a long cut, it looks like it was cut with one knife. And the situation of the cut-off end is more like the third type.Even if I guessed the murderer's occupation not so accurately, but one thing is certain: he was very calm when he committed the crime, terribly calm.He even gave the arm a good wash after dismembering it, so there was hardly any blood on it.

Taking out a magnifying glass, I noticed that the muscles and blood vessels at the stump remained slightly contracted.We often see such a situation in life: Whenever we are accidentally cut, the wound that should be a straight line will become an open "small mouth", which is actually due to muscle contraction. We are good.Bleeding can be reduced due to the constriction of blood vessels. But once a person dies, this will not happen. Whether the wound is open or not is one of the basis for us to judge whether the injury was formed before death or after death.The victim's wound was open, which seems to indicate that his arm was cut off during his lifetime.But that's not quite logical.Unless it is under general anesthesia, it is impossible to have such a neatly cut port alive, and even a rabbit will resist and struggle.I would rather believe that this is caused by a "supernatural phenomenon".The so-called superbirth phenomenon is actually very simple. Fish will move twice after being put into the pot, and people are actually similar. The muscles of the human body after death will contract after being stimulated, and this contraction will often be poorly reset due to death.This shows that the victim was dismembered within a short period of time.In other words, the murder and dismemberment are most likely at the same scene, at least not far apart.

There are still many things that I am not sure about, such as the time of death.Originally, the corpse spots could roughly determine the time of death, because after the circulation stopped, the blood would slowly deposit and infiltrate the lower parts. Now that the corpse is divided into pieces, the blood has long been drained, and the corpse spots are so faint that they can hardly be seen.The same is true for rigor, the movement of limbs is likely to destroy the already formed rigor.I can only roughly judge the victim's death time from more than 3 days to less than 2 weeks based on the freshness and the development of the fly eggs.

I also had to look under the microscope for signs of freezing.What if it was put in the refrigerator and just taken out soon? I packed the wrapping of my arm—a large black plastic bag and the cigarette butt left at the scene, and planned to take it back to try my luck.The biggest problem right now is that no one knows who the dead are, maybe I should investigate the recent disappearances. When I stood up from the ditch, I was a little dizzy from the sudden standing, and my feet seemed a little numb. In my dizziness, I heard a dreamlike voice: "How did you do it?" Turning around, I found that the owner of the voice was the assistant policeman who had been silent by the side. Very disproportionate to the erratic voice, his eyes were as wide as copper bells. I get asked this kind of question too much, what the other party actually wants to ask is: "How can you hold back your vomiting?"