Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

Chapter 4 The Pretending Scene

The room faced north and south, and it was nine o'clock in the morning. The sun shone into the living room and reflected on the pale face of the deceased, making it a bit pervasive.

"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.

At any crime scene, especially a homicide scene, blood is sprayed out, and you never know what's in the blood at the scene.

There has been a precedent of a criminal police officer being infected with a highly fatal immune system disease by blood stains at the scene of a murder.

Lu Chuan put on his shoe covers, mask and gloves, squatted down and looked at the ground in the direction of the sun, and then tiptoed to the northwest corner of the balcony.

He casually took out a red millimeter ruler from the survey box and placed it on the edge of the sofa. Lu Chuan picked up the camera to focus in the corner, and started to take a panoramic shot of the entire scene.

Although Liu Guodong has started working, he has been paying attention to Lu Chuan's performance.

In Liu Guodong's eyes, although Lu Chuan came from a major, he was diligent and agile, and even caught a wanted criminal half a month ago, but this was the first time Lu Chuan appeared on the scene.

He was not afraid that Lu Chuan could not take good photos, but mainly because he was afraid that Lu Chuan would accidentally destroy the scene.

What the current criminal police need most is not careful thinking and a shrewd brain, but caution.

I am not afraid of not finding clues to solve the case at the scene, but I am afraid of destroying the traces of the scene.

And some traces are destroyed and never have a chance to repair.

But the three details that Lu Chuan showed just now made Liu Guodong's eyes shine.

The first is the movement of Lu Chuan squatting down to face the sun and looking at the ground. This is a little skill that Lao Xiankan only mastered.

Under strong light, traces on the ground, especially footprints, will be easily found. This way of prior observation can prevent footprints or other small traces from being destroyed by the current investigation criminal police.

In some dimly lit crime scenes, the investigating criminal police will even illuminate the ground with a strong flashlight to determine the route of on-site investigation.

Although this technique is simple, it is very practical, and it is passed on 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 Lu Chuan learned this little detail from where, the second detail moved Liu Guodong a little.

stand!

Lu Chuan chose to take pictures at the southwest corner of the balcony.

On-site survey and photography can generally be divided into three levels: overview, key parts and details.

The first is an overview photo of the crime scene. It is necessary to take the panoramic view as much as possible. This is why the camera is required to be equipped with a wide-angle lens during the process of taking photos on site.

However, it is not possible to just choose a point to take photos of the general view of the scene. The general view of the scene should take into account various factors such as the terrain and light of the scene.

The location chosen by Lu Chuan is very ingenious. Judging from the scheduling of sunlight on the scene, only the balcony is backlit, and the southwest corner is facing the corpse, which can show the corpse to the maximum extent.

The dead body is of course the biggest theme of the scene of the murder scene.

Lu Chuan was able to choose the best point for this panoramic shooting just by observing around. This is not a skill but an ability.

The third detail is the red millimeter ruler that Lu Chuan took out from the survey box.

It is a standard process to choose a millimeter ruler when taking a panoramic photo of the crime scene, but the problem is that the millimeter ruler prepared by Liu Guodong in the survey box has three colors, transparent, colored and red.

The current light intensity uses a red millimeter ruler, which can maximize the clarity of the marking and the strong color contrast.

Under what light, choose what color millimeter ruler, this is not a skill, nor a standardized process, but work experience.

Lu Chuan...did he get this ruler by chance?

Do not!
If there were no previous two details, Liu Guodong would definitely think it was a coincidence.

Taking a close look at Lu Chuan who was setting up the tripod, Liu Guodong looked away, secretly thinking that he had picked up a treasure this time.

The current survey work is cumbersome and meticulous, and the workload is also heavy.

Liu Guodong and Lu Chuan had to number and take pictures of all the physical evidence at the scene, and then took macro shots of some details.

Lu Chuan's basic skills are very solid, numbering, recording, and taking pictures are in order, and Liu Guodong's worries from the beginning are gradually relieved.

Later, when Yang Sen and Bai Wenhai, who were currently surveying the room, arrived, it became even more relaxed.

The extraction of fingerprints, footprints, hair, blood, skin flakes and other tiny physical evidence were carried out in an orderly manner.

"Xiao Lu, you can't put the cotton swab directly into the evidence bag for blood extraction."

While tidying up the work at hand, Liu Guodong took the opportunity to teach Lu Chuan some experience of the current survey: "Fold the absorbent paper into a funnel shape to wrap the cotton swabs, and then collect them into the evidence bag."

Lu Chuan, who was in charge of taking pictures, nodded frequently. No one taught him these on-site details when he was in the police academy, and the system only gave him a basic field survey and photography skills, and Lu Chuan needed to learn and accumulate other experiences.

When the four of Lu Chuan were conducting on-site investigations, other criminal police officers had already confirmed the identity of the deceased, and visits and investigations by surrounding people were also underway.

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 investigating the suspects.

The entire murder scene was busy. The four Lu Chuan were doing on-site investigation, and two forensic doctors were doing a preliminary autopsy on the corpse.

Lu Chuan's photography has also reached the final step, taking macro shots of all the details.

"How's the situation?"

At 28:[-], the head of the Haizhou Public Security Bureau and the leaders in charge arrived at the scene, and Qin Yong was reporting the case.

Except for large-scale meetings, the grassroots police can only get in touch with the senior officials of the Haizhou Public Security Bureau at the scene of a major case.

"Song Bureau, Wang Bureau, the identity of the deceased has been preliminarily confirmed."

"The deceased Zhang Wen, male, 63 years old, from Haizhou City, died at three o'clock in the morning today. The cause of death was preliminarily 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 held the handle of the knife in his right hand and lay on his back on the sofa, suspected of committing suicide."

The two directors did not relax when they heard about the suicide. Both of them came from front-line police officers, and they were veteran criminal investigators.

"Okay, if it is confirmed that it is suicide, follow the procedures."

Song Jiangguo didn't say what to do if it wasn't a suicide, and Qin Yong knew it and didn't ask.

Click.

After Lu Chuan took the last vertical photo of the corpse, his work was considered complete.

"Basic task, carry out an excellent on-site survey and photographing task and complete."

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 will sound a reminder that the task is completed.

28:[-] p.m.

The body has been removed for further autopsy to determine the cause of death.

The survey work of Lu Chuan and others has also been completed.

Haizhou City is a key city in the province, with a population of more than 500 million and a relatively developed economy. Therefore, the strength of the criminal investigation team of the Haizhou Public Security Bureau is also in the forefront of the province.

The relevant equipment and instruments cannot be said to be top-notch, but they are also standard.

They have their own professional on-the-spot investigation tool cart, and four professional on-the-spot criminal police officers. Don't underestimate these people. In the general criminal investigation detachment, there is no full-time on-the-spot criminal police establishment.

All front-line investigators work part-time. Of course, once they work part-time, the work level cannot be too strict.

"Xiao Lu, pack your things and prepare to go back to the team."

Liu Guodong is nearly fifty years old, and his physical strength has not been at its peak for a long time. After working on the scene for more than five hours, his old waist is sore and his face is 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 very interested even now because he is on the scene 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 worked as a part-time driver: "Master, can the deceased be sure that he committed suicide?"

They found very few clues at the scene, no footprints, no fingerprints, and even skin flakes and hairs were packed into less than [-] evidence bags.

Liu Guodong paused slightly with his hands pressing his temples, and opened his eyes tiredly: "The possibility of suicide is not high, the scene should have been carefully disguised."

(End of this chapter)