Something happened again? ! Lu Chuan, who was still a little confused, was awakened instantly. At this time, in the case of a murder, Zhang Hui could still be called to do something. You can imagine what kind of case it was.
Liu Guodong put on his police uniform, no longer sleepy: "Another murder case?" Zhang Hui nodded, but his bloodshot eyes flashed: "It's a murder case, and... it's still in Qinghe Amusement Park!" Forty-five minutes Finally, 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.
The sun was shining brightly today, but the detective at the scene could not feel any warmth at all.
The same place where the body was dumped, the same naked body, the same person who reported the crime. Zhang Fugui's face was pale, and he was trembling when he faced Zhang Hui's inquiry.
"It's this morning... Because of yesterday's incident, my patrol time today has been advanced a little earlier. As a result..." The cordon set up by Zhang Hui and others yesterday is still there, but there is another one in the open space that should have been empty. A corpse.
Although Zhang Fugui worked as a janitor in the funeral parlor's mortuary, he encountered two corpse dumping cases in two consecutive days...
"Comrade police... how about you send someone to watch here tonight?"
"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 had seen serial murder cases and participated in investigations, but he had 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 was, Lu Chuan had already started putting on his equipment and conducting on-the-spot surveys. This time, Wang Changjiang and Shen Yan came together.
The scene had been surveyed yesterday, and except for the addition of an extra body, there were no other 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 neck strangle marks were very obvious, and the victim was also strangled to death.
"Old Wang, you do a surface examination of the body first, and we'll do a spot survey of the surrounding area." Liu Guodong took Lu Chuan, took a rough look at the body, and then started the on-site survey according to the circular radiation method, with one person spiraling outside and one person spiraling inside.
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 yesterday's incident. The cordon was now hanging on the ground and had obviously been breached.
According to normal logic, the old man who came for a walk nearby should not damage 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, let me collect footprints and fingerprints first to see if I can find anything." Liu Guodong nodded. The murderer dumped the body for the second time, which will definitely leave traces. In addition, there were no people doing morning exercises to destroy it, so the footprints were collected The possibility 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 inspected outside the wall yesterday and had an impression of the situation on the ground.
Therefore, changes on the ground can now be seen at a glance. 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 specific, footprint analysis includes two areas. One is to analyze the gender, age, and gender of the footprint owner based on the shape, size, and depth of the footprints. Basic characteristics such as height and weight.
Another direction is footprint tracking, also called gait tracking, which is a dynamic footprint analysis method.
Based on the morphological characteristics of criminals' footprints and gait characteristics, combined with investigations and interviews, the criminals' coming and going traces can be identified.
Footwork tracking is an empirical science, starting from the folk
Developed from the experience of "code tracking", after years of research, it has formed an identification technology based on footwork to identify the identity of a person.
Generally speaking, it is difficult to change a person's footprint characteristics and walking patterns. For example, there are outward and inner splays, and bow-legged and x-shaped legs.
Advanced 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 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 were messy, the indentations on the heel were deep and the forefoot was shallow, indicating that the suspect had a straight back and a good posture.
The second time the murderer dumped the body, 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'll report the direction of the murderer's footprints to Team Qin and see if I can do some tracking."
"Okay Master, after I finish collecting, we will conduct another survey of the surrounding area." After the incident yesterday morning, all physical evidence within a 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 in trouble. However, contrary to expectations, the murderer obviously did not reveal such obvious flaws.
