Chapter 4 The Disguised Scene
The room faces north and south. It is nine o'clock in the morning. The sunlight shines into the living room and reflects on the pale face of the deceased, which is a little penetrating.
"Xiao Lu, put on three layers of gloves."
Lu Chuan nodded. Lu Chuan knew this detail. Wearing two extra layers of gloves was not to protect the scene, but to protect himself.
Any crime scene, especially a murder scene, will mostly have blood spraying out. You never know what is in the blood at the scene.
There has been a precedent for detectives on the scene being infected with highly fatal immune system diseases from bloodstains at murder scenes.
Lu Chuan put on his shoe covers, mask and gloves. He first squatted down and looked at the ground in the direction of the sun, then tiptoed to the northwest corner of the balcony.
He casually took out a red millimeter ruler from the spot survey box and placed it on the edge of the sofa. Lu Chuan picked up the camera and focused in the corner, and began to take a panoramic shot of the entire scene.
Although Liu Guodong has already started working, he has been paying attention to Lu Chuan's performance.
In Liu Guodong's eyes, although Lu Chuan came from a major, was diligent and nimble, and even caught a wanted criminal half a month ago, this was the first time Lu Chuan appeared on the scene.
He was not worried that Lu Chuan would not be able to take good photos, but he was mainly worried that Lu Chuan would accidentally damage the scene.
What the current detective needs most is not careful thinking or a shrewd brain, but caution.
We are not afraid of not finding clues to solve the crime at the scene, but we are afraid of destroying traces of the scene.
And some traces are damaged and never have the chance to be repaired.
But the three details that Lu Chuan just showed made Liu Guodong's eyes light up.
The first is Lu Chuan's action of squatting down to face the sun and looking at the ground. This is a little skill that only the old Xiankan has mastered.
Under strong light, traces on the ground, especially footprints, will be easily discovered. Such observation in advance can prevent footprints or other small traces from being destroyed by the on-site criminal police during their work.
In some dimly lit crime scenes, the investigating police officers will even shine a bright flashlight on the ground to determine the route of the on-site investigation.
Although this technique is simple, it is very practical. It is passed down by word of mouth. The police academy does not teach this kind of thing. Where did Lu Chuan learn it?
If it is possible that this small detail is where Lu Chuan learned it from, the second detail made Liu Guodong a little moved.
Position!
The position Lu Chuan chose to take pictures was the southwest corner of the balcony.
On-site survey photography can generally be divided into three levels: overview, key parts and details.
The first is an overview photo of the crime scene, which should be as panoramic as possible. This is why the camera is required to be equipped with a wide-angle lens during the on-site investigation and photography process.
To take an overview photo of the scene, you cannot just choose a random point to take it. The panoramic overview photo must take into account various factors such as the terrain of the scene, light and so on.
The position chosen by Lu Chuan was very clever. Judging from the sunlight schedule on the scene, only the balcony was backlit when shooting, and the southwest corner was facing the corpse, which could show the condition of the corpse to the maximum extent.
When taking photos of the murder scene, the corpse is of course the biggest subject.
Lu Chuan was able to choose the best spot for this panoramic shot just by looking around. This was not a skill but an ability.
The third detail is the red millimeter ruler that Lu Chuan took out from the survey box.
On-the-spot photography must have reference objects. When taking panoramic photos of the crime scene, choosing a millimeter ruler is a standard process. But the problem is that the millimeter ruler Liu Guodong prepared in the on-site inspection box comes in three colors: transparent, colored and red.
The current light intensity uses a red millimeter ruler, which can maximize the clarity of marking and strong color contrast.
Under what light and what color of millimeter ruler to choose? This is not a skill or a standardized process, but work experience.
Lu Chuan...did he get this ruler by chance?
No!
Without the first two details, Liu Guodong would definitely think it was a coincidence.
After taking a careful look at Lu Chuan who was setting up the tripod, Liu Guodong withdrew his gaze and secretly thought that he had found a treasure this time.
The work of on-site survey is tedious and meticulous, and the workload is also huge.
Liu Guodong and Lu Chuan had to number and take photos of all the physical evidence at the scene, and then took macro shots of some details.
Lu Chuan’s basic skills were very solid, and his numbering, recording, and taking photos were in order. Liu Guodong’s worries from the beginning were gradually relieved.
Later, when Yang Sen and Bai Wenhai arrived at the survey room, they became even more relaxed. Fingerprint extraction, footprint rubbing, and the extraction of hair, blood, dander and other tiny physical evidence are all proceeding in an orderly manner.
"Xiao Lu, when extracting blood, you cannot put the cotton swab directly into the evidence bag."
While sorting out the work at hand, Liu Guodong also took the opportunity to teach Lu Chuan some experience in spot investigation. : "Wrap the cotton swab with absorbent paper folded into a funnel shape, and then collect it into the evidence bag."
Lu Chuan, who was in charge of taking photos, nodded frequently. No one taught him these on-site details in the police academy. The system only provides a basic level of on-site survey and photography skills, and other experiences need to be learned and accumulated by Lu Chuan himself.
While the four people from Lu Chuan were conducting on-site investigation, other criminal police officers had already confirmed the identity of the deceased, and interviews and investigations with surrounding people were also in progress.
In a homicide case, the most important thing is to determine the identity of the deceased, which involves investigating the social background of the deceased, sorting out the relationship network, and identifying the suspects.
The entire murder scene was busy. Four people from Lu Chuan were doing on-site investigation, and two forensic doctors were doing preliminary superficial examination of the corpse.
Lu Chuan’s photography has also reached the final step, taking macro shots of all details.
"How is the situation?"
At 9:28, the top leader of the Haizhou Municipal Public Security Bureau and the leader in charge arrived at the scene, and Qin Yong was making a case report.
Apart from large-scale meetings, grassroots police can only come into contact with senior officials of the Haizhou Municipal Public Security Bureau at the scene of major cases.
"Song Bureau, Wang Bureau, the identity of the deceased has been initially confirmed."
"The deceased Zhang Wen, male, 63 years old, from Haizhou City, died at three o'clock in the morning today. The cause was initially determined to be piercing the heart with a sharp weapon. "
"The reporter was the son of the deceased. Judging from the situation at the scene, the deceased was holding the handle of the knife in his right hand and lying on his back on the sofa, suspected of committing suicide. "
The two chiefs did not relax after hearing about the suicide. They were both front-line police officers and experienced criminal investigators themselves. They had seen many fake scenes.
"Okay, if it is determined to be suicide, follow the procedures."
Song Jiangguo did not say what to do if it was not suicide, and Qin Yong knew it and did not ask.
Click.
After Lu Chuan took the last vertical photo of the corpse, his work was completed.
“The basic task is to carry out an excellent on-site survey and photography task and complete it.”
Let’s first look at the process of taking photos from far to near, from overview to details. When Lu Chuan pressed the shutter for the last time, the system completed the task.
Two:28 p.m.
The body has been removed for further autopsy to finally determine the cause of death.
The on-site exploration work by Lu Chuan and others has also been completed.
Haizhou City is a key city in the province, with a population of more than five million and a relatively developed economy. Therefore, the strength of the Criminal Investigation Detachment of the Haizhou City Public Security Bureau is also among the best in the province.
The relevant equipment and instruments cannot be said to be top-notch, but they are still standard.
It has its own professional investigation tool truck and four professional investigation detectives. Don’t underestimate these people. In general criminal investigation detachments, there are no full-time investigation detectives.
They are all part-time frontline investigators. Of course, once you work part-time, the work level cannot be too demanding.
"Xiao Lu, pack your things and prepare to return to the team."
Liu Guodong is nearly fifty, and his physical strength is no longer at its peak. He has been busy at the scene for more than five hours, and his old back is sore. Face tired.
The same is true for Yang Sen and Bai Wenhai. Anyone who squats in a small space for a whole morning will get tired.
Lu Chuan, on the other hand, is still very interested even now because he is on site for the first time and has the system-rewarded field survey and photography skills to practice.
On the way back to the detachment, Lu Chuan, part-time driver: "Master, can you be sure that the deceased committed suicide?"
They found very few clues at the scene, no footprints, no fingerprints, even skin flakes, The hair contained less than twenty evidence bags.
Liu Guodong's hands pressing his temples paused slightly, and he opened his eyes slightly tiredly: "The possibility of suicide is unlikely. The scene should have been carefully disguised."
(End of this chapter)