civil forensic

Chapter 674 One step closer

Old bones have been soaked in sewage pools or corpse water for about two years. Even young people who drank milk to supplement calcium during their lifetime should not be able to stand it anymore. Look with a horseshoe mirror to see the bumps on the surface of the bones. It is indispensable.

This is different from the bones of pigs, cattle and sheep that we see every day.Then, most of the pigs who go from the vegetable market to thousands of households are between 8 and 12 months old, and the sheep and goats are a little older, so they will take an extra summer class. Most of the cows are about three years old. , so they are slightly robust, but no matter what they are, they are still much younger than young humans in their twenties.The bones are naturally smoother and smoother.

Jiang Yuan and the others took the horseshoe mirror to look for the scratches inch by inch after confirming that there were really scratches.

At this time, Zhan Kan and other small forensic doctors can only do second-line work and accompany them all the way.

Soon, everyone discovered that Zeng Lianrong was always doing inspections at a relatively uniform speed, while Jiang Yuan's speed was getting faster and faster.

In the back, Jiang Yuan's horseshoe mirror moved on the corpse at three times the speed of Zeng Lianrong.

If it was his apprentice, Zeng Lianrong would definitely scold him. The search was so fast, if there were any omissions in the middle, the whole work would be for nothing, and he would have to go back and search again.

But Jiang Yuan operates like this... Zeng Lianrong is not good at giving opinions. Although he thinks that he is not serious enough, considering Jiang Yuan's record and ability, he has nothing to say. Anyway, Jiang Yuan just touches it with his hands. Also top at least 8 Zhan niches.

Jiang Yuan himself didn't feel it.

He is LV6 tool trace identification, this skill is also the top skill he currently possesses, at this time, he also opened the temporary skill +1, nearly 7 hours of tool trace identification LV7, that is to say, there is no household registration book Otherwise, everything produced anywhere will have to be rolled out.

In a short time, Jiang Yuan found six traces of sharp knives, all of which were shallow and corroded by the environment, so they were easily overlooked.

According to Jiang Yuan's analysis, at least a LV4 or higher crime scene investigation, or forensic anthropology, or forensic pathology, is possible to find and confirm these tiny scratches. If you want to identify them easily, It is best to have a qualified LV5 skill.

In Shannan Province, one has to be a top boss, the kind who sits upright in front of the dissecting table and watches with a horseshoe mirror all day and night.

From this point of view, Zeng Lianrong's technical level is also very high, and he deserves to be one of the masters of the city's anatomy center.

"The marks of No. [-] being dismembered are still obvious. There are eleven places in total. No. [-] also left knife marks on the joints, indicating that it was cut into large pieces." Jiang Yuan put down the horseshoe mirror and pondered. : "It was done very carefully, almost only the tip of the knife touched the bone, it should be an action like breaking the fascia."

Jiang Yuan simulated it, and felt that the murderer's movements were very neat.

"He's a veteran." Zeng Lianrong sighed and said, "He'd better be trained in a slaughterhouse."

When the old forensic doctor said this, several young forensic doctors present couldn't stand it anymore. Among them was a girl with obvious nausea symptoms on her expression.

Zeng Lianrong carefully looked at the few knife marks marked by Jiang Yuan again, and found that they seemed to be finer than the ones he found, so he couldn't help but feel relieved, and then said: "If I wanted to find this kind of person when I was young, I would find someone from the Intelligence Department. Scan the list of meat processing enterprises in the city, and then combine the lists of some people who have done private slaughter before, and you can basically determine the scope. Now... this is not a matter of our city."

"Then let Tao Zhi know that horn knives and bamboo baskets are not very commonly used things. If you are lucky, you may be able to find them." Jiang Yuan said that he didn't have high expectations.

This trick is more effective for ordinary murderers, because ordinary people plan to kill countless times, and then finally decide to implement it because of a certain opportunity, and the final realization is often the group of people who are most anxious. Those who can bear it for a while may give up later.Therefore, ordinary people's murder tools are either ready-made household items, or they are bought and used now.

But the murderer in this case probably has a weapon in his hand. Just look at the few corpses here. No. [-], No. [-] and No. [-] were all dismembered by the same knife. Obviously, the murderer did not commit a case, so he just abandoned it. Habit of the weapon.

Zeng Lianrong also called with some expectations.

In the case of a serial killer, one cannot expect a road leading to the sky to guide the police.As has been said before, becoming a serial killer is both a pervert and a social choice.No premeditated murderer wants to go to prison. If he is not arrested, these guys who benefit from killing will probably continue to commit crimes in the next life. If they have not been discovered or caught, they will It's possible to be a serial killer.

And no matter how the serial killers were formed, when they escaped through multiple rounds of screening, they had already mastered many skills that they should not have mastered, so that ordinary criminal investigation methods were no longer effective against them.Only careful investigation, or technical progress, or luck, or the murderer's own mistakes, can there be a chance to catch this guy.

Many serial killers in foreign countries failed to be arrested in the end. The famous ones such as Zodiac provoked the police frantically and still escaped. It can be said that it really shocked the society.

Jiang Yuan continued to look at the bones with the horseshoe mirror. This was a very tiring thing, and normal forensic doctors would not do this under normal circumstances.

Most of the time, forensic doctors work under a microscope, that is, they make pathological sections of corpses and then study them under a microscope. The content is a bit like that of a pathology department in a hospital.However, when the forensic doctor finds that his research subject has cancer, he only needs to smile knowingly: the loss is not much.

The magnification of the horseshoe mirror is not as good as that of the microscope, but it is more convenient than the microscope. It belongs to the more equipment used for trace inspection.Jiang Yuan is used to on-site inspections, and it doesn't hurt to look at them with a horseshoe mirror.

Zeng Lianrong made a long phone call, and when he came back, he saw Jiang Yuan staring at a bone with fascination.

When he got closer, Zeng Lianrong coughed twice, and said, "I just talked to Tao Zhi for a while, there is still a certain chance of the bull knife, even if the murderer bought the knife a long time ago, but the person who uses this kind of knife, It is likely to buy related items, such as whetstones and the like. Another one, doctors or forensic doctors, if they want to dissect corpses, they are still accustomed to using lancets and knives, indicating that the occupation is likely It's related to the slaughter industry..."

Jiang Yuan raised his head at this time and said, "Forensic Doctor Zeng, wait a moment."

After finishing speaking, Jiang Yuan took a piece of PVC static sticker from the tray beside him, covered it on the sternum lock joint just seen, and then smoothed it as much as possible.

Zeng Lianrong looked over and saw that there were tweezers, scissors, scotch tape, evidence bags, sulfuric acid paper, etc. on the tray, and there were suction devices beside it. He immediately understood that Jiang Yuan was extracting trace evidence.

Zeng Lianrong asked his disciple Zhan Kan with his eyes.

Zhan Kan was stunned for a moment, then hurriedly said: "Team Jiang is talking about a white spot on the sternoclavicular joint, it doesn't look like a bone chip."

"what is that?"

"It's more like white paint, let the lab take a look." Jiang Yuan turned the static sticker over, and a white particle that was barely visible to the naked eye stood on it.

"Isn't it something in the soil or sewage?" Zeng Lianrong picked up a magnifying glass, looked at it from a distance, and then asked himself and answered: "It really doesn't look like it, it's a bit like paint."

As he spoke, his eyes lit up.

Paint is a very special chemical product, and it is also a relatively comprehensive one among the various material libraries collected by the ministries and commissions. Most of the paints can basically be confirmed by comparison. Take it one step further.

(End of this chapter)