Why the deceased died is a very serious topic for forensic doctors. Forensic pathology, that’s what the whole book is about. The court also attaches great importance to the cause of death.
Just like today's case, if the death is caused by arson, that is, the deceased died due to arson but was not the target of arson, then he may be sentenced to life imprisonment. But if it is arson after killing, this is an aggravating circumstance, and it is basically the death penalty.
On the other hand, if someone accidentally kills someone in a fire, or if someone else sets a fire after killing someone and the body is burned, he may be sentenced to life imprisonment. Niu Tong, who was mainly engaged in dissection, also had a solemn expression. Burning after killing is a relatively common scenario. In order to escape their crimes, murderers often resort to various methods of destroying homes and eradicating traces. However, after having so many knives on his abdomen, his lungs felt like they were tingling... These are two completely different causes of death.
A tingling feeling in the lungs, or a feeling of holding snow, usually means that it is related to suffocation. Niu Tong cut the lung tissue without hesitation. I saw some pink foamy liquid flowing out. This further proves that the death is most likely related to suffocation. So, the deceased was stabbed in the abdomen, injured, and then suffocated to death by the smoke? Niu Tong's eyes couldn't help but look at the throat of the corpse. As we all know, corpses killed by smoke have three characteristics.
First, the airway and mouth may be injured by high-temperature smoke. Second, the eyes are usually closed. The first item is easy to understand.
The second item is actually very easy to understand. The irritation of smoke is so great that it can cause death. And being in the smoke, you will definitely not be able to help but close your eyes. The third item has high carboxyhemoglobin saturation. It actually represents an indicator of carbon monoxide poisoning. This indicator is usually negative among normal people, and the indicator in smokers may be 0.02 to 0.04. But if there is carbon monoxide poisoning in the smoke, the carboxyhemoglobin saturation index will rise to more than 20%. However, the opening and closing of the eyes is not easy to verify.
Because human eyelids can be covered after death. For example, if some men cry bitterly at the fire and cover their brother's eyelids, they will be suspected of strangling their brother to death and covering up the cause of death.
Carboxyhemoglobin saturation requires toxicology testing to prove it. Originally, for forensic doctors, the most direct way was to cut open the airway and take a look. But the tissue on the deceased's chest, including the upper part of the throat, had been carbonized. Niu Tong stepped forward and made a cut. Nothing could be seen, so he didn't cut any more. "Can you take your heart blood and send it for examination?" Jiang Yuan asked politely. "Yes, sure."
Niu Tong's reaction was a beat slower than Jiang Yuan's. The heart blood is taken for toxicology testing. Jiang Yuan once again recommended himself and said, "I'll do it."
He is here to practice, and he can't just keep dangling on the edge. Niu Tong was stunned for a moment and gave up his position to Jiang Yuan. Jiang Yuan took the blood from his heart and the contents of his stomach. Toxicology testing mainly tests these two areas.
One represents what's in your blood, and the other represents what's in your stomach. After taking out the things, Jiang Yuan tapped his abdomen with a knife and asked, "Let's look for it." Wang Lan and Niu Tong were stunned again, and whispered, "Let's look for it."
He didn't need to say what he was looking for, and the three forensic doctors started looking for it together. No clots.
"The stomach is broken, but there are no blood clots and no carbonization." The same is true here in the lower abdomen, but there is no carbonization. Everyone spoke out the key points in a tacit understanding.
If a blood vessel is cut before death, there will be bleeding. This is because the heart pumps blood out. Broken blood vessels will not bleed after death because the heart has stopped beating. The reason why you cannot eat blood-letting pork in European and American countries, apart from economic factors and customs, is that blood-letting pork requires the pig to bleed while it is still alive, which is very unethical for Europe.
The absence of blood clots in the abdomen means that the blood vessels of the deceased were broken after death. Or theoretically, the blood clots may have been burned away by the flames.
Saying that there is no carbonization in the stomach and no carbonization in the lower abdomen is to reduce the possibility of follow-up. Looking at it this way, toxic asthenia and mechanical asthenia are more likely. After death, so many cuts were made on the body... Niu Tong couldn't help but shake his head.
Jiang Yuan gestured at the location of the stabbing and said that it was possible that an acquaintance committed the crime, and he was afraid of being recognized, so he stabbed him again.
"It's very possible." Niu Tong said excitedly, "Then I'll make a call first." The cause of death has basically been found.
The specific situation depends on the drug test report, but the stabbing in the abdomen was done after death. This has a great impact on the detection of the case, and the frontline must be notified first.
When Niu Tong cleaned his hands, made a phone call, and put on his gloves again, he saw Jiang Yuan and Wang Lan taking out the heart and examining it carefully.
Have you noticed anything?" Niu Tong quickly stepped on his footstool and came on stage. He was bleeding a little bit," Jiang Yuandao said. Circumstantial evidence of asphyxiation. "Niu Tong nodded.
Asphyxia can lead to hypoxia, which can form spot-like hemorrhages on the surfaces of multiple internal organs. Such is the heart of the dead.
However, it is not easy to notice spotting bleeding in the condition of the corpse today. My chest was almost burning.
If the fire had been extinguished slower, it would have burned down the entire house, and his heart would have been burned to the core. "Jiang Yuan's eyes are quite good. Niu Tong said appreciatively. Wang Lan raised his head, shook his head, and slowly
He explained the discomfort in his neck and said, "Jiang Yuan's eyesight is not only good, he went for the bleeding on the surface of the internal organs. The liver and kidneys were carefully examined. The bleeding on the heart can also be found, and the bleeding has to be dried."
"Forensic doctor Jiang can do it." Niu Tong nodded.
Knowledge is written in books, and it is not easy to use it appropriately at the right time... Niu Tong's evaluation of Jiang Yuan was still a young newcomer, but now he has a slightly higher opinion.
"Let's finish the rest. Captain Lei will come over and take a look soon." Niu Tong said and continued to work hard.
Cao Keyang, the trace examiner next to him, was so tired of helping that he almost vomited. He sighed and said: "Is your Captain Lei coming here in the middle of the night?"
He didn't sleep in the middle of the night, so it was okay. Niu doesn't have any thoughts about personal leadership. Jiang Yuan, Wang, Cao Keyang and the forensic assistant nodded in agreement. The atmosphere in the anatomy room became warm as a result.
An hour later, Lei Xin, the criminal police captain of Qianjin District, Qinghe City, ran over. "Forensic Doctor Jiang, thank you for your hard work, thank you for your hard work.
Qinghe City has a total of three districts. Qianjin District belongs to the old urban area. The criminal police brigade of the district bureau is at the same level as the criminal police brigade of Ningtai County.
This is a detective who is a bit thin, has yellow hands and yellow teeth, and can only use his brain but not his hands at first glance. Entering the door, Lei Xin first greeted Jiang Yuan politely, and then gave cigarettes to others. Jiang Yuan said "It's okay" and took the cigarette and lit it. If you show courtesy no matter what, it must be for the sake of business.
Taking advantage of the case to get acquainted with each other, Lei Xin said again, "Forensic Doctor Jiang, Forensic Doctor Wang, Niu Tong, let me introduce the case."
good. "
Lei Xin spoke and said, "To put it briefly, today...yesterday afternoon, a house built by villagers caught fire in the area where we are moving forward. After the fire was put out, the DNA of the female body found was compared. , I also just got the results.
The deceased’s name was Zhang Yin, 22 years old. unmarried.
Rent here. The situation at the scene was that the deceased was lying on the bed in the house without any clothes on, so there was a possibility of home invasion and rape. "In self-built houses in urban villages, the number of people coming and going is more complicated, and there are few cameras.
"We are currently investigating Zhang's social relationships. The deceased worked in a shopping mall as a salesperson at a L'Oreal counter, and she did not feel particularly close to her colleagues. Her parents did not know much about their daughter's social relationships. Lei Xin went on to say, Forensic doctor Dao "Jiang" has time to take a look at the scene.
Jiang Yuan didn't object, he just scratched his head and said, "There was very little evidence at the scene after the arson. He had done fingerprints on arson cases before, so he was pretty clueless."
Lei Xin had nothing to hide, so he said: "Basically no evidence has been found during the current investigation. If no evidence such as semen is found on the body, even if the person is found, there will probably be a lack of physical evidence." The murder weapon
"The murder weapon was thrown in front of the fire point. It was a chef's knife, the kind used in Western-style kitchens, a five-piece kitchen set or something like that. It was given in a wooden box with the knife inside. The outside was also burnt.
Not to mention, Lei Xintao is almost back in his element, and the problems he is encountering now are really difficult. Lei Xin said truthfully, "We haven't found any results yet in our investigation. Even if there are results,
Well, I still have to worry about physical evidence. Nowadays, murder cases are becoming more and more demanding. Without DNA evidence or hard physical evidence, prosecutors complain. Wang Lan nodded sympathetically, "CSI effect."
The CIS effect means that everyone has watched too many TV movies and variety shows about forensic science, so that everyone’s requirements for forensic science have increased.
In European and American countries, the CSI effect is reflected in jurors' requirements for physical evidence and increased expectations. For example, jurors will demand more DNA testing with the most advanced technology possible. In China, the CSI effect is more reflected in
On the leadership. Especially for non-professional leaders, or more senior leaders, when they ask about "physical evidence" in a certain case, it is impossible for criminal investigators to say that they do not feel pressure.
To a certain extent, this is actually an improvement. After all, leaders who want "physical evidence" seem to be more scientific than leaders who want "oral confessions."
But for people like Lei Xin, who are at the grassroots level, all aspects have to be taken into consideration.
