Chapter 245 – Low-temperature burning

Dr. Zhai kept hearing Jiang Yuan's name when he arrived in Qinghe City.

In terms of solving cases, Jiang Yuan has indeed solved quite a few cases recently.

Successively solving major cases is something that ordinary criminal investigators dream of, but it's a rare experience.

Personal third-class merit in the police system is relatively easy to obtain, but second-class merit is quite difficult. Jiang Yuan has received two second-class merits, which indicates that he has achieved what most police officers cannot.

Dr. Zhai did not achieve this.

When he was transferred to the provincial department 30 years ago, Dr. Zhai was one of the few professional forensic doctors who graduated from a regular medical university in the province, and he had extensive experience.

During Dr. Zhai's era, forensic identification was the true scientific and technological strength of the court. Dr. Zhai cooperated with the criminal police to solve many cases and also self-studied many techniques.

Unlike today's forensic doctors, many people revolve around clinical forensic medicine. In Dr. Zhai's era, forensic anthropology was part of daily life, and forensic toxicology and forensic entomology were also areas of study.

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Because there was nowhere to seek help.

In today's era, when forensic doctors encounter some unfamiliar techniques, they directly seek help from others.

This was the era of forensic medicine, with modes of operation that were unimaginable and unattainable.

However, on the other hand, Dr. Zhai's technical learning was also very difficult. Unlike today, where one can easily find learning resources for whatever they want to study.

Even senior technical personnel within the system could not easily obtain the information they wanted.

Despite this, Dr. Zhai's skills were still very strong.

In recent years, he has continued to excel.

With three years of advanced experience, it can be said that it is a blow to the novice criminals.

However, today's autopsy is extremely difficult, and there is a request for him to wait for Jiang Yuan. Now that he has seen the person, Dr. Zhai deliberately observes him.

Jiang Yuan did not think too much and operated step by step. The process of the autopsy did not show anything special.

Dr. Zhai was not surprised. After the body was sent over, he carefully examined it but could not come up with any effective conclusions.

It can only be said that an ordinary body with exceptional skill is definitely not the work of a novice.

"Do we need to start boiling the body?" Jiang Yuan looked at Dr. Zhai after examining the body.

"Do you have any thoughts?" Dr. Zhai was also worried that Jiang Yuan, being young and energetic, would put himself in a difficult position.

Jiang Yuan shook his head and said, "I don't have any direct thoughts. The perpetrator's technique is very skilled."

"Indeed, it's not the first time they've committed a crime," Dr. Zhai immediately affirmed.

This idea was very close to his own.

And people can't help but agree with viewpoints that are similar to their own.

"What about the perpetrator of the reservoir case?" Dr. Niu, who was only assisting on the side, immediately thought of Wang Guoshan.

The two cases were not combined, but because of Liu Jinghui, everyone actually knew that these two cases had similarities.

Jiang Yuan calmly said, "It's definitely not the same person. They are both very skilled."

Dr. Zhai once again agreed with a "yes" and said, "The person who kills, has limited training opportunities. There may not be much progress in killing a few people compared to killing a dozen people. It mainly depends on talent."

Dr. Niu was stunned, then shook his head and said, "Only you can say that."

"In the past, there were actually many people who killed, especially the bandits before the liberation, and those who committed crimes later," Dr. Zhai shook his head and did not continue the conversation. He then brought up the previous topic and said, "Let's start boiling."

"I'll set up the pot for you. When the bones are boiled out, it will depend on you to take a look," Dr. Niu faced Dr. Zhai and admitted his own shortcomings without any embarrassment.

His qualifications were much deeper than Jiang Yuan's. Back then, when he was still in the jurisdiction of Shumi Qingban, Jiang Yuan probably did not have this kind of ability.

However, compared to Dr. Zhai, his qualifications were not worth mentioning.

In fact, when Dr. Niu first joined the job, he even attended Dr. Zhai's training course.

The dissection room here was Dr. Niu's territory. He called two other people and actively took out a pressure cooker and a steel pot. The former was electric, and the latter used gas. The two of them worked hard to set up the stove and started boiling water.

An average person weighs about a hundred or so pounds. Although the body that was dug up this time was in a state of decay and putrefaction, the skeleton was still there. A small pot would definitely not be enough to boil it.

The electric pressure cooker was a commercial 16-liter one, barely enough to boil a normal person's thigh bone. But if the person is over 1.85 meters tall, like Jiang Yuan, then the adjacent steel pot would have to be used.

The capacity of the latter was not large enough, but one end could be boiled first, and then the other end, taking it slow, it would eventually be boiled to remove the bones.

Boiling two people at once, this workload was even greater than boiling two or even four sheep.

Several forensic doctors worked together and it took a long time to sort it out.

Dr. Zhai was also actively helping.

This is how forensic doctors are, no matter how high their rank, they still have to do their work as usual.

After busily completing the preparations and watching both pots boil, Dr. Zhai turned around and saw Jiang Yuan lifting the body bag onto another dissecting table, looking like he was seriously studying something.

Dr. Zhai frowned, walked over, and asked, "Did you find something?"

"These body bags all seem to have changed color," Jiang Yuan was looking through the outermost travel bag."Pierced through, huh?" Dr. Niu put down the forceps and came over to take a look.

"There's a slight cut on the outer layer, but that's not the main issue," Jiang Yuan turned the inner side of the double-layered body bag and said, "Look, in order to transport the body, the murderer first dismembered it, placed the parts into plastic bags, then put the plastic bags into the red and blue checkered bag, and finally placed the checkered bag into the gray travel bag."

"That's how people pack meat before putting it in the fridge," Dr. Zhai explained with experience.

Jiang Yuan nodded and added, "But the discoloration of this bag is more likely caused by burning."

"Eh?" Dr. Zhai came over, surprised.

Indeed, one corner of the red and blue checkered woven bag showed signs of discoloration.

Even the outermost gray travel bag had red and blue marks.

This definitely couldn't be caused by contamination.

Dr. Zhai thought carefully, and it did indeed seem like marks caused by burning.

"If you burn a plastic bag, it should just disappear," Dr. Zhai muttered to himself.

"Indeed."

Jiang Yuan also muttered.

Dr. Niu watched the two deep in thought and suddenly felt too lazy to think.

His expertise was in things like tissues, outside of the body; plastic bags or rubber were still repulsive to him.

At that moment, Jiang Yuan suddenly remembered Strong's dislike for car rides, then the scene he had scanned in the parking lot, and he couldn't help but say, "It's a motorcycle."

"What?"

"The travel bag and the red and blue checkered bag, they can't withstand high temperatures, so it must be low-temperature burning. The motorcycle's exhaust pipe!"

Jiang Yuan had a good reason for this; the parking lot near the mine had traces of motorcycles but few cars.

The locals of Zifeng Town, although many owned cars, preferred to ride motorcycles up the mountain.

Motorcycles were also more popular than private cars.

Jiang Yuan used the autopsy table as a seat, turned the checkered bag sideways, and let the heated end dangle, "Look, if the body was transported up the mountain on a motorcycle, this end of the bag could have come into contact with the exhaust pipe."

"The temperature of the exhaust pipe wouldn't be low, right?" Dr. Zhai seemed uncertain.

"Um... perhaps a motorcycle with a lower exhaust pipe temperature?" Jiang Yuan wasn't too familiar with this aspect.

Dr. Cheng looked at the two bags used for the body, adjusted their positions himself, and said with uncertainty, "I don't understand motorcycles, does anyone here know?"

The forensic experts present shook their heads.

Forensic experts study clothes or toilet paper out of professional necessity, but what does riding a motorcycle have to do with it?

"Then let's find a few motorcycles to test it out," Jiang Yuan suggested.

"Conduct an experiment?" Dr. Zhai agreed.

Forensic experts often need to conduct experiments when analyzing things other than bodies. For instance, if they suspect the murderer transported the body in a suitcase, it's necessary to have a colleague of similar size lie in a suitcase.

However, sourcing motorcycles made Dr. Zhai think for a while before saying, "It's best to ask the local leaders, see if we can find a second-hand motorcycle dealer to coordinate and test several bikes."

Jiang Yuan was startled, then agreed, "That works. Good idea."

Dr. Zhai found it odd, "How were you planning to test?"

"Buy?" Jiang Yuan said, "Motorcycles shouldn't cost too much."

Dr. Zhai laughed, then seeing Jiang Yuan wasn't joking, he said, "Is the county bureau's budget that ample now?"

"Have the bureau buy it?" Jiang Yuan nodded, "That works. Good idea."

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