Chapter 111 Discovery on the Body
Haizhou City Criminal Investigation Detachment has had slightly more financial support in recent years.
Since several murders occur every year, autopsies of corpses are relatively frequent.
Five years ago, after Wang Changjiang made more than a dozen rationalization suggestions for many years, the forensic doctor finally had his own anatomy room.
Since then, Wang Changjiang’s main working place has been transferred from the funeral home to the criminal investigation detachment.
The spacious and bright anatomy room has white square tiles on the walls and white square tiles on the floor.
Compared with the eerie funeral parlor, Wang Changjiang often told Shen Yan that your generation of forensic doctors is much happier.
Telling what he did back then is no different from telling horror stories now.
Of course there is no difference. A few years ago, when conditions were not very good, Wang Changjiang basically slept in the funeral parlor when he encountered a case.
An anatomy table made of bricks and cement was used to place the body, and a camp bed was used to place Wang Changjiang.
In the cold storage next door are dozens or even dozens of neighbors who cannot speak.
In this way, you may be woken up by the leader who comes to ask for the autopsy results in the middle of the night.
I was so tired from dissecting the corpse that I fell asleep, and then I was woken up...
Wang Changjiang will never forget the experience of that year in his life.
Shen Yan is a graduate of a serious public security university and a lesbian. She is always fully armed when doing autopsies.
Three-layer rubber gloves, isolation gown, and two KN95 masks.
Because the body was frozen and had no smell, Shen Yan did not wear a gas mask today.
In fact, these things are already standard equipment for forensic doctors, but Wang Changjiang, as a senior forensic doctor, does not take them seriously.
"Xiao Lu, do you want to do the examination now, or wait for the body to thaw?"
This is not the first time Lu Chuan has come to the autopsy room. He has been here many times before to help analyze the skeleton. .
"Now, there will be water stains on the body when the body is thawed, and some small marks may be destroyed by then."
Wang Changjiang nodded: "Okay, let Xiao Shen help you, what can I do? The uncertainty is calling me.”
Wang Changjiang is also a person who knows what romance is and what the beauty of adulthood is.
“What do you need me to do?”
Wearing a mask, Shen Yan’s two big eyes blinked, and her long eyelashes could stir the heartstrings.
Lu Chuan shook his head: "I'll check the front of the body first. Just help me turn over the body later."
The collection of trace evidence is a little different from the general collection of physical evidence.
Some special equipment is required, such as magnifying glasses, strong light sources, ultraviolet inspection lamps, etc.
The first thing Lu Chuan used was an ultraviolet inspection lamp.
This is a standard tool for trace inspection and forensic medicine.
It is generally portable, and its working principle is similar to the ultraviolet light of a banknote detector, but the wavelength of the light is different.
The band of police ultraviolet inspection lights used in current investigations and forensics is generally 365 nanometers, and the ultraviolet light band on banknote detectors is 395 nanometers.
When performing dissections, Shen Yan often uses ultraviolet lamps to examine the surface of corpses, and naturally turns around to turn off the conventional light source in the dissection room - the lighting.
The examination light, glowing with purple light, illuminated the surface of the corpse from top to bottom.
Huh?
When the light checked her wrist, Shen Yan said softly: "Is this...a trace of tape?"
Lu Chuan nodded: "It should be a trace of tape binding."
Tape binding will not leave strangulation marks on the body due to the large force-bearing area, but the glue on the tape will remain.
Under the illumination of ultraviolet inspection lamp, it is undoubtedly revealed.
After further inspection, the two found similar marks on the ankles of the corpse.
"Wait a minute, I'll walk again with the lantern."
The so-called lantern by Lu Chuan is actually an LED strong light, which is an important tool for Lu Chuan to collect trace evidence this time.
The utilization of light sources is an important tool for on-site survey work. For example, last time Lu Chuan used a variable frequency laser scanner to non-destructively extract fingerprints on envelopes.
For example, the tape binding marks just discovered by the ultraviolet inspection light.
Different light sources play an important role in current investigation and forensic autopsy.
Strong light lamps can emit more intense light than the sun and have great energy characteristics.
This high-energy light source can make some subtle items invisible to the naked eye glow or brighten.
Including tiny fibers, hairs, etc.
The reason why it is called horse lantern is because this strong light source was first used in on-site surveys and originated abroad.
This kind of light source is called Luma lantern abroad. In China, it is generally simply called horse lantern.
The light beam of the lantern worn above the head was like a laser, scanning the corpse inch by inch.
"Here!"
Shen Yan pointed to a place reflecting a light yellow halo, located on the lower left rib of the corpse: "There is something here."
Lu Chuan's right hand Take the tweezers, twist up a few hairs that look a little transparent to the naked eye, and put them into a special transparent plastic tube.
For the storage of trace evidence, ordinary evidence bags cannot be used, but plastic tubes.
After sealing, Lu Chuan continued to scan: "The front is gone, let's look behind the body."
Shen Yan nodded, stepped forward to help Lu Chuan: "I haven't used it before. Where are these things? "
Although Shen Yan has dissected several corpses in the past two years, she has obviously never done such detailed work.
The frozen corpse is very heavy.
Generally speaking, the ratio of female forensic doctors is relatively small, about fifty to one.
The reason is not that women are timid. In fact, on the contrary, women may be more courageous than most men.
For example, among nurses, the proportion of women is very large.
No matter what department a nurse is in, she will always see blood, but it is rare to hear anyone say she is afraid.
The main reason why there are so few women in forensic medicine is that it is a physical job.
Unlike doctors and nurses, they work with living people.
Although it may be a living person who will not live long, he is still alive after all.
A living person can move, but a dead person is different. Once dead, he cannot move.
Opening the cavity, sawing the bones and turning the internal organs, any one of them is very physically demanding.
Shen Yan has been in the police for two years, and the autopsies she performed were all auxiliary. Wang Changjiang had to do the hard work.
The subsequent examination was relatively simple and smooth. Under the lantern light, hair similar to that of the left lower rib was found on the deceased's back and buttocks.
Then, Lu Chuan extracted residual substances from the mouth, cheeks and lower body of the deceased.
The fine substances in the nail gaps were also extracted with bamboo sticks.
It took more than two hours to complete this set.
Tired Shen Yan was panting a little, her majestic chest rising and falling one after another.
"Okay, all that's left is to send these things to the provincial department and wait for the analysis results."
Lu Chuan also did his best to obey fate.
Trace physical evidence is useful, but in real cases, it is rarely used.
This time, it was Lu Chuan who had obtained the intermediate spot investigation skills and had the ability to collect trace evidence, so he decided to give it a try.
Shen Yan took off her mask, isolation gown and gloves: "The body will be almost thawed tomorrow morning, and we will also do an autopsy."
(End of this chapter)