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

Chapter 24 Collecting Corpse Fingerprints
An hour later, a professional salvage team arrived at the scene.

For salvage in waters, the criminal investigation detachment has a special cooperation team.

From the experience of criminal investigation and case handling, the proportion of underwater cases is not high, but it is not low.

Especially in homicide cases, cases of throwing corpses in water can account for 30.00%.

In addition to murder cases, the items involved in many other cases, especially the murder weapon, are often thrown into the water.

Therefore, the criminal investigation detachment often has the need for salvage in 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, the situation below is not very clear. It may be a corpse, or it may be other things. Be careful when salvaging and try not to damage it."

Wu Jingzhong was in his 40s, with a rough appearance, and patted Ren Qiang on the chest: "Don't worry, I will go down to salvage this time myself."

The corpse has been transported away, and it is time to dissect it.

Lu Chuan followed suit.

Because no identification documents were found on the body.

Lu Chuan wanted to go back and collect fingerprints and DNA samples from the corpse to see if he could compare the identity of the deceased in the system.

Compared with collecting fingerprints at the scene of a fire, it is simpler to collect fingerprints on corpses.

Of course, the so-called simplicity depends on the degree of corruption of the corpse.

According to forensic estimates, the time of death of the body sunk in the water was about three days ago.

Moreover, due to soaking in water, the degree of corruption of the corpse is not high, but the edema is severe.

But for collecting fingerprints, the impact is not small.

The most difficult thing to collect fingerprints of corpses is the corpse with a high degree of corruption, which oozes when touched, and the whole corpse is like a big jelly, that is the most difficult thing to do.

Anatomy room.

The corpse was lying flat on the dissection table, and two forensic doctors were ready to cut.

"Ding!"

"Basic task: Complete the fingerprint extraction of soaked corpses and complete the identification of the deceased."

After receiving the task, Lu Chuan also prepared to have his fingerprints rubbed.

Judging from the shape of the corpse, the figure was well-proportioned, with slender legs and fair skin.

Although the face has been eaten by fish, the original face can no longer be seen clearly, but the face shape of the oval face can still be distinguished.

Waist-length hair, age should be less than 30 years old, she should have been a very beautiful woman during her lifetime

Lu Chuan did not directly use mimeograph to rub his fingerprints, as the soaked corpse would be swollen.

If it is not processed, the gaps between the rubbed fingerprint lines will be enlarged.

It is like enlarging the entire fingerprint by a certain multiple, which will cause considerable difficulties in the later comparison.

Opening the inspection box, Lu Chuan began to process the fingers of the corpse.

But before that, Lu Chuan needs to communicate with the forensic doctor.

After all, the current survey only has the responsibility and right to investigate the surface of the corpse. If you want to directly move 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. Look..."

Wang Changjiang is a senior forensic doctor of the Criminal Investigation Detachment. In terms of strength, he is on the same level as 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, the forensic doctor can be said to be one of the most leisurely positions.

It competes with the eldest sister 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, and the cause of death should be mechanical asphyxiation."

"Xiao Shen, help Xiao Lu, first take pictures of the corpse, fix the shape of the corpse before the autopsy, and then Xiao Lu will collect fingerprints."

"Okay, teacher."

The voice is sweet and crisp, and the other party's smile is also very attractive.

One of the police officers of the Criminal Investigation Detachment, Shen Yan.

Lu Chuan's senior sister, joined the police two years ago.

The two had known each other since they were in school. After all, a well-known school belle and a well-known school grass must have crossed paths.

"Trouble senior sister, treat senior sister to dinner another day."

"Okay, someday, I will wait for you."

Shen Yan had a sweet smile, bringing a bit of vitality to the gloomy dissecting room.

"Just tomorrow. Our two majors probably won't be too busy tomorrow."

The condition of the corpse is simple, the autopsy work can be completed today, and the current survey work is almost done today.

It's time for dinner tomorrow.

Shen Yan's photoshoot ended soon, and then Lu Chuan came on stage.

Opening the survey box, Lu Chuan took out a five-centimeter-long steel needle.

Then a paper cup was prepared, and the steel needle was slowly inserted into the nail crevice of the corpse.

The depth is shallow, only about one centimeter.

Shen Yan and Wang Changjiang had seen Liu Guodong collect fingerprints from corpses before, but after cleaning their fingers, the rubbing was done.

It's not as complicated as Lu Chuan.

"Lu Chuan, you are..."

Old Wang Changjiang was at ease, although he was curious, he didn't open his mouth, and the sensible Shen Yan asked curiously with wide eyes.

"This steel needle is hollow, which can remove the body fluid in the nail to a certain extent, eliminate swelling, and make the collected fingerprints easier to compare."

While speaking, light yellow liquid dripped from the tail of the steel needle, and the belly of the finger gradually shriveled.

Shen Yan looked at Lu Chuan's operation in surprise, and occasionally praised him.

Lu Chuan's mood is also very happy, which is the same as the peacock spreading its tail.

Collecting fingerprints is the feather screen.

Lu Chuan's operation was completed quickly, and then the hair and nails were intercepted for DNA testing.

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 the instrument.

The extraction of DNA information is not as imagined by ordinary people. The test material is directly sent to some kind of instrument, and then the DNA information can be obtained.

All DNA samples are preprocessed before information can be extracted.

The technical term for trace detection is purification.

In the past, there were many ways for the criminal investigation team to extract DNA.

It can be mainly divided into two categories, liquid extraction and solid state extraction.

But ten years ago, the higher authorities invented reagents for extracting and purifying DNA, which unified the means of extracting DNA in criminal investigations.

It also greatly reduces the difficulty of extracting DNA information.

Lu Chuan had studied it when he was in college, and he had watched Liu Guodong and the others operate the equipment for more than a month.

Although some intractable 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 Haizhou Public Security Bureau is connected to the whole province.

This is also a project that the Ministry of Finance has vigorously promoted in the past few years.

With the advancement of technology and the improvement of residents' 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 will often encounter the situation of collecting fingerprints first and then doing business after finishing.

Although Lu Chuan did not have strong fingerprint comparison and analysis skills, his fingerprint collection was very standard.

The system can perform the comparison by itself.

While Lu Chuan was busy, the salvage team at the Xingfu Reservoir also produced results.

(End of this chapter)