Chapter 113 Messy Footprints
Another accident? !
Lu Chuan, who was still a little confused, was awakened instantly. At this time, in the case of a murder, Zhang Hui could be called upon to do something. You can imagine what kind of case it was.
Liu Guodong put on his police uniform, no longer sleepy: "It's a murder case again?"
Zhang Hui nodded, but his bloodshot eyes flashed: "It's a murder case, and... …Still at Qinghe Amusement Park!”
Forty-five minutes later, Lu Chuan once again stood in the same position as yesterday.
The construction site of Qinghe Amusement Park is about 700 meters east of the main gate, at the edge of the wall near the woods.
Today’s sunshine is very bright, but when it shines on the criminal policeman at the scene, he can’t feel the slightest warmth.
Same dumping place, same naked body, same reporter.
Zhang Fugui's face was pale, and he was trembling when he spoke in front of Zhang Hui's inquiry.
"It's just this morning... Because of what happened yesterday, my patrol time today was a little earlier. As a result..."
The cordon set up by Zhang Hui and others yesterday is still there, but it should have been empty. There was another body on the ground.
Although Zhang Fugui worked as a janitor in the mortuary of the funeral home, he encountered two cases of dumping corpses in two consecutive days...
"Comrade police... How about you send someone out tonight? People are watching here?”
“Maybe the other party will come back...”
Still coming?
Zhang Hui’s eyes jumped when he heard this.
Two corpses were found in the same place two days in a row. Zhang Hui had never seen or heard of them.
Zhang Hui has seen serial murder cases and participated in investigations, but he has never experienced such a case.
Don’t talk about him, there are many people who have been working as criminal police for more than 20 years at the scene, and they have never heard of such a thing.
A body was dumped again at the same place. What did the murderer think?
Or provoke the police?
No matter which one it is, Lu Chuan has already started to put on the equipment and conduct on-the-spot surveys.
This time, Wang Changjiang and Shen Yan came together.
The scene was inspected yesterday, and except for one more body, there were no changes.
The location where the murderer dumped the body was basically the same as yesterday. The naked body turned over along the wall, with scratches on the skin and a few drops of blood on the snow.
The strangle marks on the neck were very obvious, and the victim was also strangled to death.
"Old Wang, you do a superficial examination of the corpse first, and we will do a spot survey of the surrounding area."
Liu Guodong took Lu Chuan, took a rough look at the corpse, and then followed the circular radiation method. Helix, one person within Helix began conducting on-site surveys.
Because a relatively detailed survey was done yesterday, naturally there was no big gain.
After collecting the blood stains on the snow, the two of them walked around from the main entrance to the outside of the wall.
Here, a cordon was also put on after the incident yesterday.
The cordon is now hanging on the ground and has obviously been destroyed.
According to normal logic, the old man who came for a walk nearby should not break the cordon.
Of course, according to the analysis of normal people's behavior, a body has just been found nearby, so no one should be here for a walk.
Therefore, the cordon that is being torn down now should be the work of the murderer.
"Master, I will collect footprints and fingerprints first to see if I can find anything."
Liu Guodong nodded. The murderer dumped the body for the second time, and it will definitely leave traces. Coupled with the lack of damage from morning walkers, the possibility of collecting footprints is very high. But in the case of fingerprints, the possibility is relatively small.
The weather temperature is low now, and most people already wear gloves when going out, let alone the murderer who dumped the body.
When they did a spot survey yesterday, they found no evidence such as fingerprints.
Lu Chuan surveyed outside the wall yesterday and had an impression of the situation on the ground.
So, the changes on the ground can now be seen at a glance.
The messy footprints were deeply imprinted in the snow, and there were obvious signs of hard pedaling near the base of the wall.
Taking out the ruler and camera, Lu Chuan started taking pictures.
Soon, a set of messy but clear footprints was extracted.
“According to the direction of the footprints, the other party came from the west and then returned the same way.”
To be more detailed, footprint analysis includes two areas. One is based on the shape of the footprints, The size and depth of the footprints are analyzed to analyze the gender, age, height, weight and other basic characteristics of the footprint owner.
The other direction is footprint tracking, also called footwork tracking, which is a dynamic footprint analysis method.
According to the morphological characteristics of criminals' footprints and gait characteristics, combined with investigations and interviews, the criminals' coming and going can be identified.
Footwork tracking is an empirical science, developed from the experience of folk "coding tracking". After years of research, it has formed an identification technology based on footwork to identify people's identity.
Generally speaking, it is difficult to change a person’s footprint characteristics and walking patterns.
For example, outwardly-shaped characters, inner-shaped Chinese characters, and bow-legged and X-shaped legs.
Superior footprint analysis can analyze a person's gender, occupation, body shape, habits, age, physical characteristics, etc. from the weight, gait, stride, virtual edge, pressure, soil, etc. of the footprints.
Among them, the easiest thing to judge is height and weight.
Generally speaking, the length of a footprint is equal to one-seventh of the height. Of course, this is just a general statement. The specific calculation formula is that the height is equal to the length of the footprint multiplied by 6.876.
The footprints of suspects of different ages also have characteristics of different ages.
For example, juvenile criminal suspects have short steps, thin footprints, often irregular distances between footprints, small bone seams, strong overall impression of footprints, and often curved walking routes.
In most cases, young criminal suspects have large footprints and long strides. The distance between the footprints is even and they walk in a straight line.
Middle-aged criminal suspects have different characteristics. They walk steadily and slowly, and the distance between their footprints is shorter than in their youth.
The strides of elderly criminal suspects become shorter, the pressure on the heels of the footprints is heavier than the soles of the feet, the bone seams become wider, and the overall impression of the footprints becomes sparse and has a light and airy feeling.
At the same time, if the suspect's steps at the scene are chaotic and the distance between the footprints is uneven, it means that the suspect may be exhausted or injured.
Although the footprints on the snow are messy, the indentations on the heel are deep and the forefoot is shallow, indicating that the suspect has a straight back and a good posture.
The murderer dumped the body for the second time. Although the pressure on the case increased sharply, the murderer also left more and more obvious traces accordingly.
"Xiao Lu, you collect the footprints first. I will report the direction of the murderer's footprints to Team Qin and see if we can do some tracking."
"Okay Master, after I finish collecting, we will conduct another survey of the surrounding area."
After the incident occurred yesterday morning, all physical evidence within a one kilometer radius of the scene was collected.
Now walk through it again. If you find anything, it may be related to the murderer.
For example, if the murderer smoked a cigarette after dumping the body, that would be a good thing.
This is equivalent to the suspect putting himself into trouble.
However, contrary to expectations, the murderer obviously did not reveal such obvious flaws.
(End of this chapter)