Chapter 329 Blood Footprints
There are three reasons why it has such specific characteristics.
One is the constant gravity, the other is the constant blood composition, and the last reason is the constant blood flow rate.
For a normal person, if a blood vessel ruptures, about 4.5 liters of blood in the body will drain out in a very short time.
This time is fixed when the wound size meets the conditions, because the beating force of the human heart is relatively constant.
Lu Chuan looked at every blood stain very carefully.
And compare it with the on-site reconstruction done by the QZ City Criminal Investigation Detachment.
Others are also observing the entire scene in their own way, and taking some notes from time to time.
What attracted Lu Chuan's attention the most were the bloody footprints on the ground.
There are far more blood stains on the ground than on the walls and furniture, but many traces have been erased.
Criminal suspects should have a certain awareness of anti-detection, and at least know how to erase their own footprints.
The murderer violently assaulted the victim as soon as he entered the door, and it can be seen from the blood stains on the wall that this violent process was continuous.
The distance from the door to the bed next to the window is about ten meters.
The layout of this single apartment is very simple. It is a rectangle after entering the door.
After renting, Wang Min made no major changes to the interior. A bed was placed near the window sill, some furniture was placed around it, and a sofa was placed two meters away from the head of the bed.
On the left hand side of the entrance is the bathroom and kitchen.
Qin Hui just introduced that he didn’t know how the murderer entered the room. In fact, there was a high probability that the murderer tricked Wang Min into opening the door.
If the other party opens the door with a key, it does not necessarily mean that you will see Wang Min after opening the door.
If you don’t see the person, there is no chance of hurting the victim at the first step.
Of course, this guess is only a relatively high probability, and it cannot completely rule out the situation that the murderer used the key to open the door and Wang Min was at the door. After all, the kitchen and bathroom are on the left side of the door.
The murderer started from the entrance door and continuously attacked the victim, and there were blood stains. There would definitely be traces of the murderer's footprints on the ground.
All the way to the bed, the victim was raped and killed.
Afterwards, when the murderer left, he wiped the footprints he left, and there were obvious traces of blood on the ground.
During this process, two strings of bloody footprints remained. Next to the shoe cabinet at the edge of the door, there were shoes with bloody footprints.
It was exactly what Qin Hui said that when the other party left, he wore the victim's shoes and left footprints.
In fact, from the perspective of footprint analysis, whether the murderer is wearing shoes that are larger than his own feet or smaller than his own feet, the approximate physical characteristics of the murderer can be determined.
One of the bloody footprints at the scene entered from the door, and the other started from the bedside and went backwards to the entrance door.
This can be judged from the force direction of the blood marks under the footprints.
However, there is a problem.
Since the murderer had erased his own footprints, why did he put on the victim's shoes and leave two new sets of footprints?
Have you forgotten something and turned back again?
Or is it for some other reason?
As for fingerprints, Lu Chuan didn't pay special attention to them.
The case-handling capabilities of the QZ City Criminal Investigation Detachment are a little worse than those of Haizhou City, but not much worse.
Since the other party did not extract such important evidence as fingerprints, it means there should not be any at the scene.
Obviously, the opponent should have worn gloves.
Jiang Jian killed someone without leaving any traces. The murderer...
It may not be the first time he commits a crime.
Two hours later, members of the crime team withdrew from the scene. Downstairs, Li Donglin and seven people gathered together to briefly inquire about the situation.
"Wang Song, what do you think?"
Li Donglin was originally from Tianzhou City and knew Wang Song originally.
"The murderer is probably a habitual criminal."
Wang Song made his first judgment.
Several other people nodded, obviously agreeing with Wang Song's point of view.
"What is the basis?"
"Strong homicide is different from ordinary cases. Most murderers are in a state of high mental stress and excitement when committing crimes. At this time, the rigor of their thinking will be greatly affected."
“After the crime, due to the natural exhaustion of the body, it is difficult to concentrate.”
“So, in most cases, many murderers will be left at the scene of the strong murder case. "However, we know from the forensic report that the murderer used a condom, and no biological tissue such as skin flakes or hair belonging to others was found on the surface of the deceased's body."
"This shows that the murderer was very restrained during the strengthening process and did not have too much physical contact with the deceased."
"On the other hand, the handling of the scene, the blood stains on the ground that the murderer cleaned up after the murder, Obviously there is a certain awareness of anti-investigation. "
"It is difficult for a first-time perpetrator to have such rigorous logic. The possibility of being a repeat offender is high, and the murderer may have committed crimes before. "
“One more thing, let me add it.”
The speaker was a short, fat, middle-aged man, an action team leader from the Qianzhou City Criminal Investigation Detachment, named Song Mingguang.
"After cleaning up the blood on the floor, the murderer should have returned to the bedside at the door."
"Why did he go back?"
"It should have been a last-ditch attack."
< br>"The blood stains on the bedside were partially submerged by the bloody footprints, indicating that a large amount of blood gushed out after the murderer returned to the bedside. The fatal wound on the deceased's neck was caused by the murderer returning after wiping the blood on the ground."
This time, Lu Chuan agreed with Song Mingguang's judgment.
Indeed, two of the bloody footprints beside the bed were submerged in a large amount of blood.
Moreover, this judgment is also in line with normal logic.
After all, the fatal injury to the deceased was the rupture of the main artery in the neck. If the murderer had cut the artery before committing the violence, the nature of the case would have changed.
"Do you have any other findings?"
"I suggest re-investigating the residents in the building. What Wang Song said just now makes sense. The other party has most likely had similar criminal experience. Although It doesn’t necessarily have to be a criminal record, but you can start with small things like obscenity, singleness, and voyeurism.”
"I am trying to identify the footprints here. It will take about three hours to try to identify the approximate physical characteristics of the murderer."
This time's footprints are different from usual ones. The bloody footprints can be used to make a footprint model. of.
And the shoes worn by the murderer belong to the victim, so many details cannot be inferred through simple data measurements.
Lu Chuan’s footprint identification and analysis this time was not easy.
With a certain direction in mind, everyone started to take action.
Of the seven people, Lu Chuan returned to the Criminal Investigation Detachment to conduct footprint analysis. The other six people were divided into three groups and stayed in the apartment building directly.
Ask for votes and recommend books.
(End of this chapter)