The room faced north and south. It was nine o'clock in the morning. The sunlight filtered into the living room and reflected on the pale face of the deceased, which was a little penetrating.
"Xiao Lu, please wear 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.
In any crime scene, especially a murder scene, there is usually blood spray, and 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 squatted down and looked at the ground in the direction of the sun, then tiptoed to the northwest corner of the balcony.
Lu Chuan casually took out a red millimeter ruler from the survey box and placed it on the edge of the sofa. He picked up the camera and focused in the corner, and began to take a panoramic shot of the entire scene.
Although Liu Guodong had already started working, he had been paying attention to Lu Chuan's performance.
In Liu Guodong's eyes, although Lu Chuan had a professional background, was diligent and nimble, and had caught a wanted criminal half a month ago, this was Lu Chuan's first appearance on the scene after all.
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.
They are not afraid of not finding clues to solve the crime at the scene, but they 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 detectives 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 there is a possibility that Lu Chuan learned this small detail from somewhere, 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.
When taking an overview photo of the scene, you cannot just choose a random spot to take it. The panoramic overview photo must comprehensively consider various factors such as the site terrain, light, etc.
The position chosen by Lu Chuan was very clever. Judging from the lighting schedule of the scene, only the balcony was backlit when shooting, and the southwest corner was facing the corpse, which could show the corpse to the maximum extent.
When taking photos of a 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.
There must be reference objects for spot survey photography. When taking panoramic photos of crime scenes, choosing a millimeter ruler is a standard process. But the problem is that the millimeter ruler Liu Guodong prepared in the spot survey 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 this was a coincidence.
After taking a careful look at Lu Chuan who was setting up the tripod, Liu Guodong looked back and secretly thought that he had found a treasure this time.
The current survey work is tedious and meticulous, and the workload is also heavy.
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 the numbering, recording, and taking photos were in order. Liu Guodong's worries from the beginning gradually relaxed.
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 tiny physical evidence such as hair, blood, dander, etc. 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 took the opportunity to teach Lu Chuan some experience in on-the-spot investigation: "Use absorbent paper folded into a funnel shape to wrap the cotton swab, 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 when he was in the police academy, and the system only gave him basic on-site survey photography skills. Lu Chuan needed to learn and accumulate other experiences on his own.
While the four people from Lu and 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 conducting 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's the situation?"
At 9:28, the top leader and leaders in charge of the Haizhou City Public Security Bureau arrived at the scene, and Qin Yong was reporting on the case.
Apart from large-scale meetings, grassroots police can only have access to 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, was from Haizhou City. The time of death was at 3 o'clock this morning. The cause of death was initially determined to be piercing the heart with a sharp instrument."
"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. He was 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. They had seen many fake scenes.
"Okay, if it is determined to be suicide, follow the procedures."
Song Jiangguo didn't say what to do if it wasn't suicide, and Qin Yong knew enough not to ask.
Click.
After Lu Chuan took the last vertical photo of the body, 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.
2:28 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 all work part-time as front-line investigators. Of course, once they work part-time, the work level cannot be too demanding.
"Xiao Lu, pack your things and get ready to return to the team."
Liu Guodong is nearly 50 years old, and his physical strength is no longer at its peak. He has been busy at the scene for more than five hours, and his back is sore and he looks 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, was still very interested even now because he was on site for the first time and had the system-rewarded on-site 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, and even skin scraps and hair contained in 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."
