Chapter 602: Crime Scene Reappearance
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The body was taken away, and Professor Chen deliberately followed the body away.
He does anatomy, which essentially involves working with corpses. Crime scenes are not actually part of his business scope.
Jiang Yuan was reluctant to part with the temporary skills he had just used, and said: "I want to see it again. It's been a long time since I saw the scene on the front line. When I go back, I have to look at the photos again."
In more than 500 minutes, if the skill is improved by 1 point, the understanding of the skills of case and crime scene reconstruction will be improved.
"Uh... okay." Professor Chen felt a little embarrassed, so he stayed.
The smell at the scene was strong, not only the smell of blood, but also the smell of the kitchen and dining room that had not been cleaned was also constantly wafting in.
The weak light in the restaurant was replaced by several bright headlights. The headlights were pure white and as blazing as a middle-aged man trying to make the most of his oyster-filled crotch in a limited time.
Jiang Yuan was calculating and observing the scene.
Compared with looking at photos, the smell of the scene is also one of the basis for judgment. In addition, it is difficult to observe from photos the degree of coagulation of semi-dried blood stains or the softness of puddles of blood.
Observing the time of death through blood is actually a very mature technology. There are multiple indicators in multiple dimensions that can be used for judgment.
Similar to bloodstain analysis, many veteran detectives have expertise in this area, and are better than old academics like Professor Chen.
In the early years, when encountering murders with evidence of murder or robberies with blood stains, veteran detectives often needed to estimate the time of death accurate to the hour.
In the era of eucalyptus, there was actually no need for special practice. After catching the murderer and interrogating him, and determining the time of death, he then reverse-checked the blood stains at the scene. Using this method, you will soon become familiar with the blood stains and the time of death. the relationship between. This can even be called the part where practice makes perfect.
Nowadays, there are more ways to handle crimes, and bloodstains are not so valuable. Its most special significance of crime scene reconstruction is partly transferred to the camera, and partly is slowly forgotten.
Jiang Yuan looked at the scene and simulated the scene in his mind.
After confirming the blood stains under the body, the scene in Jiang Yuan's mind became more complete.
Based on his recent experience in doing accidents, Jiang Yuan was not modest in this regard. After making sure, he said directly: "I will do an analysis of on-site reconstruction. Can everyone have a basic concept to facilitate the detection of the accident later?"
"Okay." When Huang Qiangmin was selling Jiang Yuan in other cities and counties, he saw Jiang Yuan performing similar performances. At that time, he especially wanted Ningtai County to have such an opportunity.
In the past, it was mainly because there was no suitable eucalyptus in the country. This time when I met it, Jiang Yuan took the initiative to propose it, and Huang Qiangmin seemed a little happy.
Other detectives, both experienced and unfamiliar, also joined in.
Someone else asked: "Can I record it?"
"Yes. And it must be recorded. Two more people will tag and take pictures, so that the information will be clearer." Jiang Yuan answered, then stood a few meters away from the body and said: "I'm starting, this is the starting point of the conflict. Mark it.”
A policeman took the yellow label with white characters No. 101 and placed it where Jiang Yuan pointed. The criminal technician next to him came to take pictures and record it. At the same time, the camera next to him continued to record without stopping.
The scene is in a state where all samples have been taken. Jiang Yuan took two steps back and said:
"There should have been a sudden conflict between the victim and perpetrator No. 1. In the initial stage, both parties may have had some restraint and damaged some tables, chairs and benches. The personal injuries cannot be determined."
"As perpetrator No. 1 lost control, he suddenly increased his force during the confrontation, causing the victim to hit the wall."
"The victim collapsed on the spot. At this time, the No. 1 perpetrator came forward to check, and this was the first drag. Because the victim's bleeding volume was not that large, the blood stains left behind were not so obvious. "
When Professor Chen heard this, he couldn't help but stepped forward to observe, and said directly: "I didn't even notice there was blood stains here just now."
Jiang Yuan nodded, leaned over, pointed, asked for a photo, and then said: "Later, the blood stains wiped were covered by a pool of blood, but because the pool of blood formed relatively late, we can still make some judgments."
Professor Chen looked at it carefully and nodded slowly. Although he had been away from the front line for a long time, Professor Chen knew that even if he was at his peak, it would not be easy to discover this.
The pool of blood was more than an hour after the wipe marks, so the blood stains showed different shades. This alone can already explain a lot of problems.
Jiang Yuan said at this time: "Actually, if you look carefully, the blood pool is formed twice."
Professor Chen was shocked. He had been a teacher for too long and habitually refuted: "You cannot deduce evidence from the results. There is no need to make this judgment. Even if there are two pools of blood, you can hardly say that they are two pools of blood." Forming."
Jiang Yuan did smile and said, "I judged it from the insects."
"kindness?"
"When the first small pool of blood was formed, there were insects such as ants that came to wade in the muddy water." Jiang Yuan briefly described it, squatted in front of the pool of blood, and looked again with a horse hoof mirror. , said: "These small scratches are actually left by ants and other insects coming over. Then they were covered up by the blood later."
Professor Chen looked hard for a while and said helplessly: "As I get older, my eyes are no longer good and I can't see clearly."
He didn't fully admit it, but he couldn't deny Jiang Yuan's point of view.
Jiang Yuan was no longer a student in the school, and he didn't need Professor Chen's recognition. He then took a few more steps and said, "This is most likely the escape route of the perpetrator No. 1."
Because Abuser No. 1 is currently a mental patient, this road map is not easily verified.
Jiang Yuan didn't say anything more about this. Strictly speaking, Han Shengyan, who had surrendered, was no longer a problem. Unless he really didn't do it and was mentally ill and talking nonsense, otherwise, the part that requires Han Shengyan to be the person in charge does not require much evidence to support it.
Moreover, considering that most of the outside of the restaurant is hardened, and some stores also have external cameras, etc., if you look back carefully, you should be able to find Han Shengyan - mentally ill people will definitely not do too much counter-reconnaissance. flower head.
"Where is the perpetrator No. 2?" Liu Wenkai of the No. 2 Squadron was listening with excitement and was anxious to know the follow-up.
Jiang Yuan walked back to the position opposite the original body and said, "As for the perpetrator No. 2, he should have arrived here about an hour and a half after No. 1."
Jiang Yuan carefully took two steps forward, made a movement that simulated bending over, put his hand forward, and said: "This is the location where the second drag occurred. At this time, the victim did not bleed a lot. Look at the wiping. You can see the bloodstains.”
"The second attacker checked on the victim at this time. He probably had a conversation with the victim. At least the victim was alive at the time, otherwise there would be no need to attack again."
"The victim suffered another trauma to the back of his head and died."
…
Jiang Yuan explained several detailed points in detail, and then directed the technicians to take samples again, and the on-site investigation was truly completed.
Everyone went back home, while the Criminal Division personnel processed the evidence, and the criminal police went around and began to explore the victim's interpersonal relationships.
Professor Chen and Jiang Yuan rushed to the funeral parlor and dissected the body at night.
The most important thing to check is the wound on the back of the victim's head.
Together, with the encouragement of the incense burned by Wu Jun, the two men quickly scalped the corpse.
Looking at the scalp first, you can see a rectangular central contusion and some exfoliation.
The uncovered scalp is very thin, similar in thickness and feel to a leather wallet. It is slightly slippery. After being soaked with a little saline, it has gained a certain degree of toughness. Doing so will help sew the body back together later.
In addition, there are some debris near the scalp, which are also collected for examination.
"It was indeed multiple blows." Jiang Yuan scratched his skull and came to a definite conclusion.
This time, Professor Chen was more confident and said: "And they were all flat blows. Judging from the position, the second murderer probably lifted the victim's head and knocked it down hard."
"Well, the second perpetrator is likely to have a strong relationship with the victim." Jiang Yuan breathed a sigh of relief and said to Mu Zhiyang, who was waiting next to him: "Following the network of relationships, you may gain something."