Chapter 575

The body was transported away, and Professor Chen had the intention to leave with it.

He was an anatomist; essentially, he dealt with bodies, and crime scenes were not really within his scope of business.

Jiang Yuan couldn't bear to waste the temporary skill he had just started using and said: "I want to look a bit more; it's been a long time since I've seen a frontline scene. Once I go back, I'll have to look at photos again."

With over 500 minutes of time, increasing the skill by 1 point would improve his understanding of the Case and Crime Scene Reconstruction skill.

"Uh... alright." Professor Chen felt a bit embarrassed, so he stayed behind as well.

The smell at the scene was strong; not only the smell of blood but also the odors from the uncleaned kitchen and restaurant kept wafting in.

The dim light of the restaurant was replaced by several bright, large lamps; the lamps were pure white, blazing like the crotch of a middle-aged man full of oysters, trying to exert the greatest effect in a limited time.

Jiang Yuan observed the scene while calculating.

Compared to looking at photos, the smell at the scene was also one of the bases for judgment. Besides that, things like semi-dried bloodstains, their degree of coagulation, or the softness of blood pools were hard to observe from photos.

Using blood to observe the time of death is actually a very mature technology, with multiple indicators across multiple dimensions available for judgment.

Similar to bloodstain analysis, many old criminal police officers had expertise in this area, even surpassing old pedants like Professor Chen.

In earlier years, when encountering homicide cases or robbery cases with bloodstains, old criminal police officers often needed to be precise about the time of death to the hour.

In an era with many cases, one didn't even need special practice; after catching the killer and interrogating them to determine the time of death, then cross-checking the bloodstains at the scene, one would quickly become familiar with the relationship between bloodstains and the time of death. This could even be called the part where practice makes perfect.

Now that there are more means of handling cases, bloodstains seem less valuable; their most special significance in crime scene reconstruction has partially shifted to cameras and partially been slowly forgotten.

Jiang Yuan looked at the scene, simulating the scenario in his mind.

Ever since the wiped bloodstains under the body were confirmed, the scene in Jiang Yuan's mind tended to be complete.

Based on his experience with cases recently, Jiang Yuan was not humble in this regard; once confirmed, he said directly: "I will do a crime scene reconstruction analysis. Can everyone have a basic concept to facilitate the subsequent solving of the case?"

"Good." When Huang Qiangmin was selling Jiang Yuan in other cities and counties, he had seen Jiang Yuan perform similar demonstrations and had particularly wanted Ningtai County to have such an opportunity at that time.

Previously, there were no suitable cases within the territory, but this time, encountering one and having Jiang Yuan take the initiative to propose it, Huang Qiangmin actually felt a bit happy.

Other criminal police officers, whether they had seen it or not, all gathered around.

Someone even asked: "Can we record it?"

"Yes. And it must be recorded. Let two more people come to label and take photos so that the information will be clearer later." 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 police officer placed a yellow-based, white-lettered label numbered 101 where Jiang Yuan pointed, and the criminal technology technician next to him came to take photos and record it. At the same time, the video camera next to them continued filming without pause.

The scene was already in a state where all samples had been taken. Jiang Yuan took two steps back and said:

"The victim and the first assailant should have suddenly had a conflict. In the initial stage, both sides might have had some restraint, damaging some tables and chairs; personal injury cannot be confirmed."

"As the first assailant lost control, he suddenly increased his strength during the conflict, causing the victim to hit the wall."

"The victim collapsed on the spot. At this time, the first assailant came up to check; this formed the first drag. Because the victim's blood loss was not that great yet, the wiped bloodstains left behind were not that obvious."

Hearing this, Professor Chen couldn't help but come up to observe and said directly: "I didn't even notice there were wiped bloodstains here just now."

Jiang Yuan nodded, leaned over to point, and let them take photos before saying: "Later, these wiped bloodstains were essentially covered by the pool of blood, but because the pool of blood formed relatively late, some judgment can still be made."

Professor Chen looked carefully and nodded slowly. Although he had been away from the frontline for a long time, Professor Chen understood in his heart that even if he were at his peak, discovering this would not be easy.

The pool of blood was more than an hour later than the wiped traces, thus showing different depths on the bloodstains; this point alone was enough to explain many problems.

Jiang Yuan said at this time: "Actually, looking closely, the pool of blood was formed in two stages."

Professor Chen was startled; he had been a teacher for too long and habitually refuted: "You cannot infer evidence from the result. There is no need to make this judgment. Even if it's a pool of blood formed by two puddles, it's very hard to say they were formed in two stages."

Jiang Yuan smiled and said: "I judged it from the insects."

"Huh?"

"When the first small pool of blood formed, there were insects like ants that came to muddy the waters." Jiang Yuan described it slightly, then squatted in front of the pool of blood, re-examined it with a hoof-shaped mirror, and said: "These tiny scratch-like marks were actually left by ants and other insects walking through. Then they were covered by the blood that came later."

Professor Chen tried hard to look for a while and said helplessly: "I'm old, my eyes aren't good anymore, I can't see clearly."

He didn't fully admit it, but he couldn't deny Jiang Yuan's point of view either.

Jiang Yuan was no longer a student in school and didn't need Professor Chen's approval. He walked a few more steps and said: "This is highly likely the route the first assailant took to escape."

Because the first assailant was currently a mentally ill patient, this route map was not easy to verify.

Jiang Yuan didn't say much more about this. Strictly speaking, Han Shengyan, who had already surrendered, was no longer a problem. Unless he really hadn't done it and was just talking nonsense due to mental illness, otherwise, the part that Han Shengyan needed to be responsible for didn't require much evidence support.

Moreover, considering that most of the area outside the restaurant was paved ground and some shops had external cameras, etc., if they turned it over carefully later, logically they should be able to find Han Shengyan's figure—a mentally ill patient certainly wouldn't play too many tricks of counter-reconnaissance.

"What about the second assailant?" Liu Wenkai of the Second Squadron was listening with great excitement, anxious to know the follow-up.

Jiang Yuan walked back to the position opposite the original body and said: "As for the second assailant, he should have arrived here about an hour and a half after the first one."

Jiang Yuan carefully took two steps forward, made a simulated bending action, placed his hand forward, and said: "This is the location where the second drag appeared. At this time, the victim hadn't lost much blood yet; you can tell from the wiped bloodstains."

"The second assailant checked the victim's condition at this time. He likely had a conversation with the victim; at the very least, the victim was alive at the time, otherwise there would be no need to attack again."

"The victim's back of the head suffered trauma again, leading to death."

Jiang Yuan explained several detailed points in detail, then directed the technician to take samples again, and the scene investigation was truly completed.

Everyone headed back; the criminal science personnel processed the evidence, and the criminal police went out in all directions, starting to explore the victim's interpersonal relationships.

Professor Chen and Jiang Yuan rushed to the funeral home under the stars to dissect the body overnight.

The main thing to check was the wound on the back of the victim's head.

The two of them worked together, encouraged by the incense Wu Jun lit, and quickly peeled off the victim's scalp.

Looking at the scalp first, one could see rectangular central contusions and some epidermal stripping.

The lifted scalp was very thin, with a thickness and feel similar to a parchment wallet, slightly slippery, and had a certain toughness after being soaked in a little normal saline. Doing this helped in sewing the body back up later.

In addition, there were some fragments near the scalp, which were also collected for examination.

"It is indeed multiple strikes." Jiang Yuan scraped the skull and gave a definitive conclusion.

This time, Professor Chen was much more confident and said: "And they were all flat strikes. Looking at the position like this, the second killer likely lifted the victim's head and slammed it down heavily."

"Yes, the second assailant is likely a person with a strong relationship with the victim." Jiang Yuan sighed and said to Mu Zhiyang, who was waiting nearby: "Follow the relationship network to investigate; there will likely be a harvest."