Chapter 668

"First, do the on-site investigation." Jiang Yuan waved his hand, still in a methodical working state.

Zhan Kan couldn't help but focus his attention.

He recalled the work just now. Even if he had some foreknowledge, he could only say it was plain and unremarkable—but listening to the conclusions Jiang Yuan gave, one, two, three, four, five, and then using "plain and unremarkable" to describe the investigation he had just participated in, that would be too strange.

From his perspective as a forensic pathologist, it was more like a thunderclap on flat ground.

However, even if he were given another chance, Zhan Kan still couldn't find any part that transcended the ordinary from Jiang Yuan's and his own work itself.

It really was just ordinary, plain work, and the body's manifestations were also ordinary and plain.

Zhan Kan had also been a forensic pathologist for several years and was from a department with a relatively high level of professional competence, but he still couldn't fully understand Jiang Yuan's conclusions—the content of the conclusions was naturally understood, and the conditions were also made by him following Jiang Yuan step by step. He just couldn't figure out how it changed from "known" to "deduced from this."

Jiang Yuan didn't have time to explain and just did the investigation step by step.

On-site investigation was originally a meticulous job, and the higher the level of the on-site investigation, the higher the degree of meticulousness.

When ordinary investigators do a scene, they often select targets at fixed points. It's like the famous Forensic Pathologist Niu from Qinghe City; in his early years, when he entered a scene, he wouldn't look at anything else, first collecting things like toilet paper.

Even when scanning for fingerprints, investigators couldn't look at it inch by inch. Most of the time, they would look at the position of doors and windows, door handles, drawer handles, and the area around lost items. For an ordinary small case, getting one or two hours of attention from investigators is very good.

When it really comes to scanning inch by inch, one has to distinguish the source of the fingerprints or DNA and whether there is any contamination, which is equivalent to requiring a higher level of on-site investigation ability.

Jiang Yuan finished scanning the bedroom and then scanned the living room, taking samples where necessary and taking photos where necessary, counting as having been an investigator once again. It wasn't that he didn't trust the investigators of the Zhengguang Bureau, but everyone's understanding was different, and he was now purely doing it as a homicide case. On the other hand, there were originally many investigators at the scene, so having one more person working wouldn't be wrong.

"Any discoveries?" Liu Cheng waited until Jiang Yuan started taking off his gloves again and hurriedly came over to ask.

"Can't say yet, have to go back and look at it comprehensively," Jiang Yuan said. "I'm going to the autopsy center."

"Okay, okay, okay." Liu Cheng agreed repeatedly and said, "I'll keep guarding the scene. If you have any news on your end, I can provide feedback in time."

Encountering a current homicide case, Liu Cheng was prepared to stay up all night when he took the case.

Not to mention that this case was named by several leaders, even if the suspect left the murder weapon at the scene, in a crime-of-passion homicide case, the criminal police might have to stay awake for days and nights to fix evidence, interrogate, and do paperwork...

Mu Zhiyang drove, carrying Jiang Yuan and Zhan Kan straight to the autopsy center.

The body of the victim, Zhou Xiangyang, arrived earlier and was already lying on the cold stainless steel table.

Several forensic pathologists who were free came over, specifically waiting to see Jiang Yuan's autopsy.

Jiang Yuan rarely had such an experience and couldn't help but praise, "It's really great that you have such an autopsy center, with so many colleagues working together."

"You can ask for an autopsy center," the old forensic pathologist Zeng Lianrong obviously knew a lot of information.

Jiang Yuan smiled and said, "In our Ningtai County, there are two forensic pathologists including me, and my master is about to retire..."

While speaking, the setup on the autopsy table was already completed.

The body was laid flat on the table.

The old man was over 1.7 meters tall before he died, and his body type was on the thin side. Now that he had become a corpse, he belonged to the type that was relatively welcomed by forensic pathologists. One cut down, and it wouldn't spray fat, nor would it be too hard to cut.

"Record the time, and then... now it's dark purple livor mortis, and rigor mortis is distributed in all joints of the body. The bulbar conjunctiva is pale, and there is congestion in the junction..."

Jiang Yuan did a surface examination again before picking up the knife to cut.

Zhan Kan hurriedly put down his notebook to assist, while a forensic pathologist beside him obediently picked up the camera to start taking photos.

There was full video recording in the autopsy room, but the precision was definitely not as good as taking photos. Most importantly, the angles were different, and sometimes the content reflected was also different.

Zeng Lianrong was an old hand in the autopsy center and only needed to stretch his head to watch.

He had cooperated with Jiang Yuan on two cases before, and the process of understanding each other had been completed; he was currently in a learning state.

Watching Jiang Yuan open the three cavities, Zeng Lianrong naturally leaned over and handed a bucket to Jiang Yuan.

Forensic pathologists like to use buckets to hold organs like the stomach, heart, and lungs. Using a basin makes it easy to spill, which would make the forensic pathologist feel disgusted. Moreover, it affects accuracy. Furthermore, some people eat a lot, or have enlarged hearts and lungs, so the load will far exceed expectations.

As the saying goes, if you don't open a person's stomach, you never know how many bowls of cold noodles can be stuffed into it.

"A small amount of light red foamy liquid can be seen in the tracheal cavity..."

"There is a large amount of liquid in the stomach..."

"Patchy hemorrhage can be seen under the pancreatic capsule..."

"There is homogeneous pink edema fluid in the alveolar cavity..."

Speaking of this, Jiang Yuan looked up at the other forensic pathologists and said, "Under these circumstances, we should consider death by poisoning."

Zhan Kan was still stunned, but Zeng Lianrong had already nodded in agreement.

Whether to consider death by poisoning is related to whether to perform toxicological testing immediately and the meticulousness of the testing. Most importantly, if it is judged to be death by poisoning, heart blood must be taken immediately to prevent the poison from being metabolized in large quantities.

Although the sensitivity of toxicological testing is now very high, there are too many types of poisons, and there are always some poisons with small residual amounts.

Moreover, contrary to what many people imagine, toxicological testing does not mean putting blood containing poison into an instrument and having the instrument beep out the answer. In essence, toxicological testing is still a process of comparison. The instrument does store data on some common poison components, which can beep to some extent, but for slightly more obscure poisons, they have to be re-compared and analyzed one by one, which has its own difficulties.

Jiang Yuan also quickly took heart blood and packed stomach contents and urine, etc., and had them sent to the toxicology laboratory on the spot.

Next, several people carefully checked whether the body had external injuries, needle marks, etc., and then completed the remaining autopsy.

As it was nearing the end, a blue ball rolled from the corner of the corpse's mouth to Jiang Yuan's hand.

Zhou Xiangyang's legacy—Cryptography (LV5)—Zhou Xiangyang was a genius among the crowd since he was a child. It was the same in elementary school, middle school, and high school. Even after entering university, he was still at ease and at the top, which always made him consciously seek challenges. Cryptography is perhaps the most competitive of all disciplines, especially when he first entered this field. The world was bipolar, the demand for cryptography was endless, and the future of cryptography seemed infinitely broad... In recent years, the commercial value of cryptography has been increasingly developed. The development of new internet technologies such as blockchain has allowed Zhou Xiangyang's students to always get very high salaries, but Zhou Xiangyang himself gradually began to feel bored. Making money was not his original intention for studying cryptography.

Jiang Yuan sighed secretly. After the examination was completed, he silently stitched up Zhou Xiangyang's body, thinking to himself, even as a corpse, the death mystery left by Zhou Xiangyang was top-notch. He only hoped that he could crack his death code.

"Help me make a call to Branch Chief Tao," Jiang Yuan said, his hands occupied, turning his head to the forensic pathologist beside him.

The forensic pathologist beside him hurriedly dialed and placed the phone beside Jiang Yuan.

"Branch Chief Tao." Jiang Yuan waited for the call to connect and then said, "Zhou Xiangyang's autopsy is finished. The cause of death is not yet clear, but it is highly likely that he was poisoned. The heart blood has been sent for toxicology. I noticed that the project he is currently working on is related to cryptography. Please see if you need to notify the National Security Bureau."