Chapter 404: Extremely Cruel Methods
The office is currently being investigated.
Lu Chuan is analyzing and identifying the footprints collected at the scene.
Due to the large amount of blood at the scene, the footprints left by the murderer were very clear.
In addition, Lu Chuan also collected some blood stains on the wall and prepared to do some blood stain morphology analysis.
This auxiliary footprint identification result can more accurately identify the physical characteristics and age range of the suspect.
In recent years, a term called murderer portrait has emerged in the field of current investigation.
Actually, this is not a new statement. The murderer's portrait has been around for a long time, and the Haizhou City Public Security Bureau has a dedicated suspect portraitist, who is currently assigned to the Picture Detective Brigade.
In recent years, murderer portraits have a broader meaning, not only referring to the murderer's facial features, but also including physical features, age range, personality traits, psychological characteristics, etc.
It is an emerging comprehensive discipline. When Lu Chuan was in university, some tutors were leading doctoral students to study this direction.
Of course, the effect is not particularly ideal, because obtaining an accurate and complete portrait of a criminal suspect involves not only professional criminal investigation knowledge, but also psychology and other aspects.
Lu Chuan had some exposure to criminal psychology when he was in college, but he didn’t study it in depth.
"Footprints...length...width...pressure analysis and comparison of front and rear soles..."
The murderer left many footprints at the scene, which can reveal a lot of body shape information, gait, and gait. Angle, stride length, etc., Lu Chuan had a lot of data to analyze, and it couldn't be finished in a short time.
On the other side, Yang Sen and Lao Bai are also conducting fingerprint identification analysis.
Liu Guodong found at the scene that the fingerprints collected were relatively complete and it was relatively easy to make mistakes.
After the on-site investigation, the second operation team collected everyone’s fingerprints and footprints during the questioning process.
“This fingerprint comparison was successful.”
“It belongs to the stevedore Zhang Shuang.”
“I also successfully compared one of them, and it belongs to a worker... …”
The fingerprint identification process went relatively smoothly, but the results were not ideal.
The murder weapon on the back of the deceased had obvious wipe marks, and the murderer processed the fingerprints before leaving.
Lu Chuan checked every inch of the human skin on the wall. Forget about fingerprints, he found a lot of blood and scratch marks, which should be traces of the force left when the skin was pulled and nailed, but The marks were smooth, and the killer must have been wearing something like rubber gloves that were close to the skin.
The possibility of solving the case through fingerprints is getting smaller and smaller.
On the other side, the action team is also conducting an investigation into the interpersonal relationships of the deceased Zhang Xiaofeng.
Zhang Xiaofeng worked odd jobs on construction sites in his early years. Later, he became a contractor because of his daring and hard work. Gradually, he gained a group of people under his command.
After Zhang Xiaofeng made his first pot of gold in the construction industry, he did not continue to work in this industry. Later, he opened a game hall and ran a chess and card room in the city. He met people from all walks of life and had complicated interpersonal relationships. He opened this eastern suburbs lumber factory five years ago until he was killed.
"Divided into three groups, one group went to Zhang Xiaofeng's hometown and the village to investigate the situation. The focus was on those people who followed Zhang Xiaofeng to work and see if Zhang Xiaofeng had any enemies back then."
"Another group focused on the game hall and chess and card room opened by Zhang Xiaofeng before to find out who Zhang Xiaofeng had a conflict with back then. The key point is to focus on investigating those who had conflicts."
"Third This group is focusing on the Dongjiao Timber Factory. Everyone who has worked in the factory and later resigned in the past five years must be investigated. The focus is on whether there are any who were fired by Zhang Xiaofeng and who may have resentment. "
Based on Ren Qiang's experience in handling cases, there are two possible possibilities for the murderer to use such cruel methods, peeling off the skin of a living person and then killing him. First, the murderer is a pervert, an extremely psychopathic psychopath, who is extremely obsessed with killing people. He kills people to satisfy his perverted mental needs. In other words, the murderer should be a psychopath.
But this possibility is relatively small, because most of these people are serial murderers. For them, killing is just a simple spiritual need, and there is no need to kill anything. Motive, he could kill anyone on the street.
A long time ago, there was a murderer on a rainy night in Haizhou City. The murderer had no motive for the murder. He just went out on rainy days to look for a woman wearing red clothes.
On rainy days, red clothes.
If these two conditions are met, he will kill someone, it's that simple.
After he was caught, psychologists conducted a psychological test on the murderer. He had an extremely rare overly paranoid personality.
When certain stimulating conditions are reached, the murderer himself cannot control his inner needs.
But this does not mean that the other party is mentally ill. He can perfectly control his own behavior. His methods of committing crimes are secretive and cruel. He is a natural person with complete behavior.
The second one, which Ren Qiang thinks is the most likely, is revenge killing.
The murderer and the victim had a huge grudge, so the murderer resorted to such extreme methods to torture the other party by cutting off the tongue, damaging the vocal cords with sulfuric acid, and skinning the victim alive.
And... Ren Qiang feels that it is most likely related to the lumber factory.
This kind of revenge killing can actually happen anywhere, but why did the murderer choose the lumber factory?
You must know that there are more than 30 people living in the factory. The murderer kills people in the factory area, and there is a huge risk of exposure.
In addition, the murderer should be very familiar with the schedule of the lumber factory, otherwise, the murderer would not choose to attack in the factory.
The risk of being discovered is too great.
At 9:40 pm, in the conference room of the Criminal Investigation Detachment, Qin Yong was presiding over a case analysis meeting.
"Forensic doctor, Lao Wang, please tell me the situation."
"Okay, the autopsy results have come out, I will report them."
"The deceased Zhang Xiaofeng, Male, 49 years old, from Haizhou City, died at 1:30 this morning. He was severely abused before his death.”
"Here, we found the deceased's tongue and a sulfuric acid bottle at the crime scene, in the corner where the human skin was nailed."
"The diluted sulfuric acid used by the murderer is not fatal, but it is enough to damage the vocal cords."
"The purpose of the other party's doing this should be to prevent the other party from making a sound when abusing the deceased."
"The fatal injury was on the back, reduced to penetrating the back of the heart. The deceased lost too much blood Death."
"How about the skinning technique? Do you have any professional background?"
Wang Changjiang shook his head. He knew that Qin Yong meant whether the murderer might have a professional background such as a doctor.
"Probably not. The murderer's method of skinning was very rough. The skin was not completely peeled off. There were many damages and traces of violent tearing."
"From a forensic perspective, The murderer’s purpose is to torture the other person.”
(End of this chapter)