An hour later, a professional salvage team arrived at the scene.
For water salvage, the criminal investigation detachment has a dedicated cooperation team.
Judging from the experience of criminal investigation and handling of cases, the proportion of underwater cases is not high, but it is not low either.
Especially among homicide cases, the proportion of corpses dumped in water can reach 30%.
In addition to murder cases, items involved in many other cases, especially murder weapons, are often thrown into the water.
Therefore, the criminal investigation detachment often has the need to salvage from the water.
Wu Jingzhong used to be a professional swimmer and founded a salvage company after retiring.
It is the salvage team that the Criminal Investigation Detachment has been cooperating with.
"Old Wu, I'm not sure about the situation down there. It might be a corpse or something else. Be careful when salvaging it and try not to damage it."
Wu Jingzhong, who was in his forties and had a rough appearance, patted his chest with Ren Qiang and said, "Don't worry, I will go and salvage it myself this time."
The body has been taken away, and we must seize the time to conduct an autopsy.
Lu Chuan also went back.
Because no identification documents were found on the body.
Lu Chuan wanted to go back and collect the fingerprints and DNA samples of the corpse to see if he could compare the identity of the deceased in the system.
Compared with collecting fingerprints at a fire scene, collecting fingerprints on a corpse is simpler.
Of course, this so-called simplicity depends on the degree of decay of the corpse.
According to forensic estimates, the body sunk in the water died about three days ago.
Moreover, due to being soaked in water, the degree of decay of the corpse was not high, but the edema was severe.
But for fingerprint collection, the impact is not small.
The most difficult thing to collect fingerprints from corpses is corpses with a high degree of decay. They ooze corpse water when touched, and the whole corpse looks like a big jelly. That is very difficult.
Anatomy room.
The body lay flat on the autopsy table, and two forensic doctors were ready to operate.
"Ding!"
"Basic mission: Complete fingerprint extraction from the soaked corpse and complete identification of the deceased."
After receiving the task, Lu Chuan was also ready to print his fingerprints.
Judging from the shape of the corpse, the figure was well-proportioned, the legs were slender, and the skin was fair.
Although the face has been eaten by fish and the original appearance cannot be seen clearly, the oval face shape can still be distinguished.
She has long hair that reaches her waist. She must be less than thirty years old. She must have been a very beautiful woman during her lifetime.
Lu Chuan did not directly use mimeograph to rub his fingerprints. The body would be swollen after being soaked.
If left untreated, the gaps between the imprinted fingerprint lines will become enlarged.
It's like enlarging the entire fingerprint by a certain factor, which will cause considerable difficulties in later comparison.
Opening the discovery box, Lu Chuan began to process the corpse's fingers.
But before that, Lu Chuan needed to communicate with the forensic doctor.
After all, the current investigation only has the responsibility and right to inspect the corpse surface. If you want to directly touch the corpse, you must obtain the consent of the forensic doctor.
"Forensic Doctor Wang, the corpse has been soaked and the fingers are swollen. I need to do some treatment on the fingers, but it will not affect the completion of the autopsy. You see..."
Wang Changjiang is a senior forensic doctor of the Criminal Investigation Detachment. In terms of strength, his technical level is equivalent to that of Liu Guodong.
However, in terms of status, he is not as high as Liu Guodong.
Action teams and criminal police squadrons generally cannot find forensic doctors.
In the entire criminal investigation detachment, forensic medicine can be said to be one of the most idle positions.
I can compete with the lady who delivers newspapers at the newsstand at the door.
"It's okay," Wang Changjiang waved his hand: "There are no other injuries on the surface of the body. The cause of death should be mechanical asphyxia."
"Xiao Shen, please help Xiao Lu. First take photos of the corpse and fix the shape of the corpse before the autopsy. Then Xiao Lu will collect fingerprints."
"Okay, teacher."
The voice is sweet and crisp, and the other person's smile is also very attractive.
One of the police beauties of the Criminal Investigation Detachment, Shen Yan.
Lu Chuan's senior sister joined the police two years ago.
The two knew each other when they were in school. After all, a well-known school beauty and a well-known school idol must have crossed paths.
"Excuse me, Senior Sister. Please treat Senior Sister to dinner another day."
"Okay, I'll be waiting for you someday."
Shen Yan smiled sweetly, bringing a bit of vitality to the gloomy autopsy room.
"Just tomorrow. Our two majors probably won't be too busy tomorrow."
The condition of the corpse is simple, the autopsy can be completed today, and the current investigation is almost done today.
Just in time for dinner tomorrow.
Shen Yan's photo taking ended quickly, and Lu Chuan came on stage next.
Opening the discovery box, Lu Chuan took out a five-centimeter-long steel needle.
Then he prepared a paper cup and slowly inserted the steel needle into the corpse's fingernails.
The depth is shallow, only about one centimeter.
Shen Yan and Wang Changjiang had seen Liu Guodong and others collect fingerprints from corpses before, but they just washed the fingers and then directly rubbed them.
It's not as complicated as Lu Chuan.
"Lu Chuan, what are you..."
Wang Changjiang was at ease. Although he was curious, he did not speak. The sensible Shen Yan stared curiously with her big eyes.
"This steel needle is hollow, which can remove body fluids from the nails to a certain extent, eliminate swelling, and make the collected fingerprints easier to compare."
As he spoke, light yellow liquid dripped from the end of the steel needle, and the pads of his fingers gradually shriveled up.
Shen Yan watched Lu Chuan's operation with a surprised look on her face, occasionally tutting her tongue in praise.
Lu Chuan was also in a happy mood, just like a peacock spreading its wings.
The feather screen is used to collect fingerprints.
Lu Chuan completed the operation quickly, and then intercepted the hair and nails to use as DNA testing materials.
Next, Shen Yan and Wang Changjiang were busy dissecting and issuing an autopsy report.
Lu Chuan returned to the laboratory and first extracted DNA information through instruments.
The extraction of DNA information is not like what ordinary people imagine. The test materials are directly sent into a certain instrument, and then the DNA information can be obtained.
All DNA test materials must be pre-processed before information can be extracted.
The technical term for trace inspection is purification.
In the past, criminal investigation detachments used many methods to extract DNA.
It can be mainly divided into two categories, liquid extraction and solid extraction.
But ten years ago, the authorities invented a reagent for extracting and purifying DNA, which unified the methods of extracting DNA in criminal investigations.
It also greatly reduces the difficulty of DNA information extraction.
Lu Chuan studied it when he was in college, and he has watched Liu Guodong and others operating instruments for more than a month.
Although some difficult and complicated diseases cannot be solved, general DNA extraction is still no problem.
After processing the inspection materials, Lu Chuan began to prepare for fingerprint comparison.
The fingerprint database of the Haizhou Municipal Public Security Bureau and the entire province are connected to the Internet.
This is also a project that the provincial government has vigorously promoted in the past few years.
With the advancement of technology and the improvement of resident information, more and more people are being fingerprinted.
In some police stations, there are even indicators in this regard, how many fingerprints must be collected in a year.
Therefore, many people who go to the police station to do business often encounter situations where fingerprints are collected first and then the business is done.
Although Lu Chuan did not have excellent fingerprint comparison and analysis capabilities, his fingerprint collection was very standard.
The system can perform comparisons on its own.
While Lu Chuan was busy, the salvage team at the Xingfu Reservoir site also made results.
