"The murderer held a knife in his right hand and stabbed the abdomen and neck of the deceased one after another. Judging from the photos and bone fragments, the piercing was very deep and powerful. The piercing marks on the ribs were on the right side, tilted slightly downward, indicating that it was piercing the front side, with the tip of the knife down, and the piercing marks on the cervical spine were on the front side, and the piercing direction was from top to bottom, indicating that the murderer was on the top and the victim was in a supine position when he stabbed his neck."
When Jiang Yuan was talking, he moved his fingers and Miao Ruixiang next to him quickly recorded it.
Chen Changfeng didn't react for a while. It was not until the captain next to him patted his shoulder again that Chen Changfeng took out a notebook and started to make records. He was just a little confused. Why did he suddenly start dictating the autopsy report? And it was such a professional analysis? Isn't it a bit too direct? Doesn't it need to be checked repeatedly?
Chen Changfeng thought to himself that he really didn't know what to remember in his hand, and his eyes unconsciously glanced at the bone fragments in Jiang Yuan's hand.
These bones flowed out of his hands, and he had read many bones several times. Jiang Yuan could recite them by his analysis, but how to associate the traces on the bone pieces with the traces in the book is a problem. Most people's bones are just like humans, not as white as jade.
"So, the murderer may have stabbed the victim's abdomen first and poked here from top to bottom... The victim fell to the ground and continued to stab the neck, and then there would be such traces." Jiang Yuan summarized and gestured at the scene.
Cui Qishan looked at it and couldn't help but say, "So, the murderer is very tall? He is twenty or thirty centimeters taller than the victim? How tall is the victim?"
"The victim is about 1.72 meters." Li Guangnian, the captain of the first brigade of the Donghua City Criminal Police Detachment, immediately spoke.
Cui Qishan's eyes lit up, as if Holmes: "In this way, the murderer is a giant man over 1.9 meters tall, and is likely to be a two-meter-high man? If such a person is met, the people he meets may have some impression. Although it has been a little longer, if appropriately guided...at least, it should be very prominent in the surveillance video..."
"It is also possible that when the murderer killed someone, the victim was sitting." Jiang Yuan interrupted Cui Qishan's beautiful fantasy and said again: "The 8th rib on the right side has an oblique cut in the front edge of the lumbar spine, the direction and level are about 20 degrees down, and the sternum xiphoid process is not damaged... Therefore, the murderer stood while the victim sat."
The light in Cui Qishan's eyes quickly went out as if he heard that his blind date was not being written.
"That doesn't mean that the murderer's height is 20 cm taller than the victim's sitting position." Xiao Si learned from it and applied it to other words: "The murderer was probably bent down and poked."
"Indeed, the height of the murderer is difficult to judge for the time being." Jiang Yuan nodded.
Chen Changfeng took advantage of the time when several people were talking, his eyes kept approaching the bone pieces in Jiang Yuan's hand, and gradually twisted himself into a strange shape.
"What are you doing?" Li Guangnian slapped him in the face.
Chen Changfeng was beaten to almost ventricular fibrillation, and his gluteal muscles tightened, saying, "I want to look at the 8th rib on the right."
Jiang Yuan heard it and handed it to Chen Changfeng.
Chen Changfeng took it with a little embarrassedly, and while placing it under the light, he whispered: "This scratch... the edge doesn't seem to be very sharp..."
"It's really easy to confuse." Jiang Yuan agreed that ordinary forensics cannot achieve LV1 forensic anthropology technology, which is not a derogatory point. Forensic anthropology is very difficult itself, and its practical application is not widespread for ordinary forensics. It's more like a compilation to programmers. If you know what you are good at, it's normal to not understand it.
Early forensics may often encounter old cases and corpses, but without systematic training, they will not have a high degree of mastery of forensic anthropology. Nowadays, forensics, who encounter the most common daily life, are actually injury identification, which is abnormal death such as suicide and traffic accidents. Occasionally, some cases of passionate murder, that is, forensics in big cities, can perform dozens of autopsy in a year.
For forensics like Chen Changfeng, ordinary murder cases are just ordinary autopsy, but forensic anthropology is actually not useful.
Jiang Yuan was interested in seeing Chen Changfeng, so he said: "Generally speaking, it is necessary to have sharp edges to judge that it is a scratch caused by a sharp weapon, but there are two points in this case. The first point is that the weapon may not be particularly sharp, and it may be a blunt knife that has not been sharpened or something else. The second point is that you can do SEM."
Chen Changfeng laughed twice: "We don't have scanning electron microscopes, either."
Although there are more than 100,000 yuan in cheap scanning electron microscopes, government procurement is not calculated like this. The funding allocation of police stations and laboratories in different regions is also different. The vast majority of police stations without scanning electron microscopes are.
As the forensic doctor of the county bureau, Jiang Yuan also knew this point and nodded kindly: "Then let's look at the trabecula of the bottom bone. If it is neatly cut and there is no sign of corrosion, it is a knife mark. Otherwise, it may be an animal biting or something. However, this scratch is more difficult to judge, and it can be judged based on the scars in other places."
Chen Changfeng thought he would be carved, but after listening to Jiang Yuan’s explanation, he suddenly breathed a sigh of relief and at the same time he became confident, saying: “For example, the lumbar vertebrae, the front edges of the vertebrae L1 to L3, but the scratch feels oblique.”
"The murderer disturbed him." Jiang Yuan said calmly.
Chen Changfeng immediately felt the picture: "Puncture it in with one knife, and then stir it a few times?"
"Well, it's not easy to draw the knife if you don't disturb it." Jiang Yuan's expression became even colder, and he said, "The victim is in good health. Since the murderer held a sharp blade and poked his abdomen, he should still have the power to resist. Therefore, the murderer may have stirred hard twice after encountering resistance. The victim was in pain and resistance fell. The murderer pulled out the knife and poked directly on the neck, causing the victim's trachea to rupture, blood pouring into his lungs, and mechanically suffocating to death."
"In this case, the place where the deceased is the place where the corpse is abandoned, not the first scene?" Li Guangnian said as he began to simulate what Jiang Yuan said again, with a sad face.
Jiang Yuan nodded and explained to Li Guangnian next to him, saying, "Forensic anthropology is still relatively indiscriminate."
If each bone in the human body is regarded as a life cycle of one month, examining more than 200 bones in the human body is like examining a person's life for more than 200 months, looking at what went wrong or even the cause of death after more than 200 months of life.
Like the 8th rib on the right, it is like watching a person's 15-year-old life in his 8th month. On this day, he encountered a major setback, leaving a trace.
Corresponding to the bone, this is a scratch.
As for the forensic doctor, finding this scratch is one thing, and judging the nature of this scratch is another thing. Finally, it is not as easy as expected to confirm that it is a knife mark.
If a corpse is violently exposed, it is inevitable to encounter various challenges, such as insects, mice, birds, stray cats and dogs, etc., it is possible to invade the corpse. It is not just that you see scratches or something, you can judge that it is a sharp weapon.
Li Guangnian naturally understood Jiang Yuan's explanation and smiled and said, "We actually hired other experts in this case, and the analysis was not as clear as you. The experts at that time also praised Xiao Shen, saying that the young man protected the scene well, but unfortunately it happened to be raining..."
Jiang Yuan did not continue the topic of other experts and turned around and said, "I think this case can be tried to start with the murder weapon."
Li Guangnian hurriedly said: "You said."
Jiang Yuan: "First of all, the form of this case is actually not like a long-planned murder, and it is not as clean as the other two rainy night cases. Therefore, this case can be considered to be a more rudimentary state of the murderer, and the two subsequent cases, at least in terms of methods, seem to be more escalated. Of course, the victims have different genders and different resistance strengths..."
"Changing gender can also be a way to upgrade." Liu Jinghui interrupted at this time, saying: "Only after killing someone, you will know that killing women is easier than killing men."
The few people present nodded slightly.
Chapter completed!