The 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 put forward more than a dozen rationalization suggestions for many years, the forensic doctor finally had his own autopsy room.
From then on, Wang Changjiang's main workplace shifted 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 gloomy funeral parlor, Wang Changjiang often told Shen Yan that your generation of forensic doctors is much happier.
What he did back then, told now, is no different than telling a horror story. 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 autopsy table made of bricks and cement was used to place the corpse, 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, in the middle of the night, you may be woken up by the leader who comes to ask for the autopsy results. He was so tired after dissecting a corpse that he fell asleep, and then was woken up... Wang Changjiang will never forget his experience.
Shen Yan graduated from a serious public security university and was a lesbian. She was always fully armed when doing autopsies.
Three layers of rubber gloves, isolation gown, and two kn95 masks. Since 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 bones.
"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, call me if you have any questions. "Wang Changjiang is also a person who has been here before and knows what romance and the beauty of adulthood are.
"What do you need me to do?" Shen Yan, wearing a mask, blinked her big eyes, 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 somewhat 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 by current investigators and forensics is generally 365 nanometers, and the ultraviolet light band of banknote detectors is 395 nanometers.
Shen Yan also often used ultraviolet lamps to examine the surface of corpses when performing dissections, and naturally turned around to turn off the conventional light source in the dissection room - the lighting.
The inspection light, glowing with gleaming 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, because the force-bearing area is large, will not There were strangulation marks on the body, but the glue on the tape would 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 a lantern." What Lu Chuan calls a lantern is actually an LED bright 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 can emit light that is more intense than the sun and has 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 on the head was like a laser, scanning the corpse inch by inch.
"Here!" Shen Yan pointed to a place that reflected a light yellow halo, located on the lower left rib of the corpse: "There is something here." Lu Chuan held tweezers in his right hand, twisted up a few hairs that looked somewhat transparent to the naked eye, and put them Enter 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 these things before." In the past two years, Shen Yan Although he had dissected several corpses, it was obvious that no such detailed work had been done.
The frozen body was 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 bolder than most men.
For example, among nurses, the proportion of women is very large. No matter what department a nurse is in, they will see a lot of blood, but it is rare to hear anyone say they are afraid.
The main reason why there are so few women in forensic medicine is that it is a physically demanding 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 cannot move.
Opening the cavity, sawing the bones and turning the internal organs, any one of them is very physically demanding. Shen Yan had 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 deceased's mouth, cheeks and lower body. There are also fine substances in the gaps between nails, which are also extracted with bamboo skewers.
This set took almost more than two hours to complete. 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 got 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."
