National Forensic Doctor
Chapter 657 - 601: Fold Back (Request for Monthly Pass)

Chapter 657: Chapter 601: Fold Back (Request for Monthly Pass)

"The murderer has turned himself in!"

"The victim’s ex-boyfriend, named Han Shengyan, claimed he had a conflict with the victim over relationship issues. The time was around noon today..."

"This Han Shengyan has some mental issues, his parents came with a diagnosis report and such."

Bureau Chief Chai Tong relayed the message he received, let out a sigh, and put away his phone.

A murder with mental health implications can be logistically understood in terms of investigation, but politically it’s difficult to connect it with logical problems.

In other words, with this tide receding, Bureau Chief Chai Tong would inevitably retreat as well.

"Professor Chen, thank you for your hard work." Chai Tong took a couple of steps forward, ready to take Professor Chen back with him.

Now that the murderer had confessed, although there were still a series of case procedures to follow, for Chai Tong, this case had effectively come to an end.

Even if a forensic doctor needed to issue a report, that would be the job for Jiang Yuan or Wu Jun. Professor Chen, being an external consultant, wasn’t even qualified to sign off on it in the first place.

Professor Chen stood up, feeling somewhat regretful, and said to Jiang Yuan, "I was hoping to continue working on the front line, but it seems I didn’t get the chance."

Whether as a forensic doctor or as an anatomy professor, seeking front-line work always required cooperation from the deceased. It was quite normal that Professor Chen rarely found such opportunities. In fact, for a place like Ningtai County, a murder case coming to a close without the need for detection was also quite normal.

The perpetrator this time was a typical city murderer with mental health issues, who, after a crime of passion and fleeing, returned to turn himself in under family persuasion...

Although there were no statistics, murderers like this were all too common.

Huang Qiangmin also came over and said to Jiang Yuan, "We’re about done with the crime scene, let’s transport the body back."

The scene was, after all, only good for some external examination. The detailed autopsy report would still have to be done back at the lab.

The surrounding officers also began to stand up more relaxedly.

Jiang Yuan cleared his throat twice and said, "Hold on a moment."

"Hmm?" Huang Qiangmin turned around, puzzled.

"Who is conducting the interrogation of the murderer? It hasn’t started yet, has it?" Jiang Yuan asked.

"They’re in the middle of it," Huang Qiangmin, seeing Jiang Yuan’s question, dialed straight back.

When the call connected, Huang Qiangmin handed it to Jiang Yuan.

After exchanging pleasantries, Jiang Yuan asked, "Could you please clarify the details during the interrogation, verify the exact time of the conflict, and track the number of attacks and whether there was a return."

The first two requests sounded normal, but Jiang Yuan’s last point about a return raised more interest.

Everyone present was a police officer, except for Professor Chen, but pretty much everyone caught on to the implication.

Huang Qiangmin asked, "Is there a situation of secondary injury?"

Hearing this, Professor Chen immediately came over and took another look at the body, saying, "The back of the head sustained multiple traumas, but it’s difficult to confirm if there was secondary injury."

His own expertise in anatomy was top-notch, and naturally, he was also highly skilled in forensic science, so he spoke with confidence.

Jiang Yuan nodded, "Based on the wounds, it is indeed difficult to differentiate. However, I think there is an issue with the timing of the bloodstains. Also, from the state of the body, the criminal act was not completed in one go."

"Bloodstain..." Professor Chen, with less experience, thought about directly determining the creation time of bloodstains just by looking—while not impossible, it would most likely require some reference to documentation and calculations.

After all, this was a very serious murder, and to provide an accurate conclusion, one would definitely need to take into account the environment, including whether there was direct sunlight, the temperature inside the restaurant, etc.

Assuming the victim died at noon, it would have been at most six or seven hours by now. To say there was secondary criminal activity based on blood evidence, the time difference might be just one or two hours.

Such a short interval could be influenced by whether the restaurant had air conditioning, the intensity of the sun, and whether there was a breeze, all of which could become key factors. Moreover, different time dimensions would vary by region and season. From a scholarly perspective, there would be numerous regression equations...

Of course, Professor Chen couldn’t memorize all this; he specialized in anatomy, and the distance between him and someone skilled in Bloodstain Analysis was like the difference between a crocodile and a turtle.

But to say he needed to look them up now, Professor Chen actually felt it was quite unnecessary.

He directly asked, "How long do you believe the difference in the timing of the bloodstains to be?"

"One and a half hours, at least," Jiang Yuan replied, precise and cautious, because for this particular murder case, the time difference was especially significant.

At the same time, Jiang Yuan was quite confident.

Honestly, when it came to the current case, Jiang Yuan had an abundance of techniques at his disposal.

For a freshly deceased body that had only died at noon, faced with Level 6 death time determination, Level 4 forensic pathology, and a full set of Level 5 Bloodstain Analysis, crime scene investigation, and so on, it wasn’t an exaggeration to say that Jiang Yuan knew better how the victim died than the victim knew himself.

And Jiang Yuan’s answer completely brought everyone, who had just relaxed, back to a state of high tension.

Everyone was familiar with Jiang Yuan, and their confidence in him could be said to be stronger than in their own wives.

If Jiang Yuan had mentioned a discrepancy in time, then there were two possible explanations, one killer or two.

If it were one killer, it would be simple—just interrogate the current suspect who had turned himself in. But if there were two killers, finding the second one would be no joke.

The investigation boxes that were just about to be packed away were now readjusted for brightness and continued the search for fingerprints and footprints.

Jiang Yuan changed his gloves and observed the bloodstains while waiting for the interrogation results from the station.

Since the suspect had surrendered, the interrogation shouldn’t be a problem—at least getting some basic information wouldn’t be an issue.

Sure enough, the phone call came through after not too long.

Huang Qiangmin passed it directly to Jiang Yuan.

"This Han Shengyan claims he didn’t double back. As for the specific details of the violent conflict, Han Shengyan can’t recall. The current issue is that he has had a mental breakdown due to the incident and his testimony might have flaws," the officer on the phone kept it as brief as possible, clearly aware that there were changes at the scene.

"What about Han Shengyan’s parents? When did they see Han Shengyan?" Jiang Yuan asked.

"Around 4 p.m.," the officer at the station replied.

Calculating the time, it was just enough for a round trip. But unless it was a premeditated double back, the timing was a bit tight.

At this moment, Huang Qiangmin said, "We could check the last time his cell phone connected to a base station."

That would require a request to the technical investigation team.

Jiang Yuan nodded and also activated the Crime Scene Reconstruction (temporary +1 and lasting 535 minutes) skill.

This skill was a recent acquisition, and its reconstructive effect didn’t come solely from Bloodstain Analysis but also from crime scene investigation, Image Enhancement, and other skills.

In the current scene, it was at least equivalent to Level 6 Bloodstain Analysis.

"Firstly, the victim hit a wall," Jiang Yuan observed the scene again and took a step forward, calling over a technician to take pictures and said, "This should be an absorption bloodstain."

Professor Chen also came over, nodded, and said, "Indeed, but it’s quite normal for absorption bloodstains to form over several hours."

"I’d bet there are also wipe marks in the blood here," Jiang Yuan spoke and then realizing that Professor Chen was his former professor, he quickly added, "What I mean is, based on the location of this absorption bloodstain, it appears the victim had moved."

"That’s quite a bold bet," Professor Chen didn’t know how to feel at that moment, seeing a student who had graduated only two years ago growing to such an extent that he even started to wonder about the capabilities of his own academy.

Jiang Yuan just smiled and called two people over, saying, "Let’s move the body away."

Together, they carefully lifted the body.

As the body was removed, underneath it, a distinctly obvious wiped bloodstain was revealed.

Of course, wiped bloodstains can have many explanations, such as the victim crawling with difficulty before death, which could lead to such bloodstains.

However, crawling would typically leave other traces around, such as bloody handprints, or marks from the knees or feet exerting force.

Without these, and considering the body was lying on its back, the wiped bloodstain was likely the result of passive movement.

Professor Chen slowly nodded and couldn’t help saying, "You really got it right."

Jiang Yuan acknowledged tacitly. Indeed, it was quite a difficult move.

Bureau Chief Chai Tong, who had been standing on the sidelines, suddenly felt extremely uncomfortable. Jiang Yuan’s capabilities were perhaps too strong. And such a strong subordinate managed to slip through his fingers?