On the projector, eight photographs were arranged in two rows, each row containing four photos.

"These are the crime scene photographs taken during the investigation."

Each photograph was labeled with a serial number, from left to right, numbered one to eight.

Ren Qiang got up and walked to the projector, pointing to the photograph labeled as number one: "The bag containing the dismembered body, with very clear rolling marks."

The photos at the scene were all taken by Lu Chuan.

Besides the black plastic bags, the photos also had directional markings of the bags' rolling directions.

"The bags have rolling marks on the ground, direction from east to west."

"Everyone look at the second photo, same rolling marks from east to west."

"And the intervals between all the bags are quite even, roughly every 200 meters there's one."

Eight plastic bags, each one 200 meters apart, with rolling marks from east to west.

This is all the information displayed by the crime scene photos.

Everyone held their breath, waiting for Ren Qiang to continue his analysis.

"From this information, it can be determined that the suspect was moving from east to west on Folk Street."

"Moreover, the perpetrator used a vehicle to dispose of the body."

A vehicle?

Zhang Hui raised his hand: "Group Leader Ren, why a vehicle?"

"Though there are many dismemberment bags, each bag doesn't contain much body parts. An adult can easily carry one."

"Or, could it be possible that the suspect was on a motorcycle?"

Zhang Hui's question made sense, and several detectives nodded silently.

Eight dismembered plastic bags, examined by the Forensic Doctor and Crime Scene Investigation.

The weight is indeed not much, any adult could carry it.

Was there a specific reason for Ren Qiang to conclude that the murderer was using a vehicle?

It should be known that the disposal of a dismembered corpse and the means of transport used by the suspect are extremely important.

This is a crucial aspect for detectives to analyze in further investigations.

If this is misjudged, the investigation could go completely off track.

With the murderer on foot, while the investigation focuses on vehicles, any talk of cracking the case becomes meaningless.

Ren Qiang loosely clenched his right hand: "Firstly, analyzing from the rolling traces of the plastic bags, the possibility of the suspect on foot can be basically ruled out."

Magnifying one of the photos, Ren Qiang continued to explain: "This is a photo of the first plastic bag taken by Lu Chuan using the center photography method."

"Look at the rolling traces on the plastic bag, there are clear abrasion marks on the ground, the plastic bag rolled several times."

"And here," Ren Qiang pointed to a section of broken icicle on the wall above the plastic bag: "This broken icicle is right above the black plastic bag, the other icicles are intact, only here is broken, it should be from the body bag impact."

"If the murderer was disposing of the body on foot, the body bag would unlikely have rolling traces of several circles, and it would be very difficult to break the icicle on the wall."

While speaking, Ren Qiang picked up a trash bag in the corner of the conference room, packed it, and threw it out.

Sure enough, the bag quietly stopped at a distance, with no rolling marks.

Ren Qiang retrieved the bag and threw it out with great force: "The murderer disposing of the body would unlikely exert so much force."

The bag rolled out, simulating the suspect's disposal of the body.

"Why is it a vehicle then, the suspect could also use a motorcycle, right?"

Ren Qiang nodded: "Eight bags, apart from the Roujiamo shop..." he glanced at Wang Shuai, whose face was pale.

This kid...

Is somewhat unfortunate.

"Except for the bag outside the Roujiamo shop, we didn't capture first-hand photos of other bags being disposed, the rest are about 200 meters apart."

"How likely is it that this distance was deliberately arranged by the suspect?"

Every 200 meters, throw a bag, deliberately?

Most people shook their heads, this possibility seemed unlikely.

"Therefore, I think the suspect might have been inside a vehicle, intermittently discarding the body bags."

"If the suspect was on a motorcycle... it seems impractical."

Qin Yong nodded, Ren Qiang's analysis had some merit: "What about the surveillance, how's that going?"

Zhang Hui was in charge of the surveillance review.

"There are two surveillance cameras on Folk Street, one on each side. We have marked all vehicles and pedestrians entering and exiting Folk Street yesterday, and are preparing for a thorough check."

The mechanism for solving homicide cases is very comprehensive, and the process is well established.

How each team is divided is pre-planned, even if someone is on a sudden leave or unable to participate due to other cases, there are alternate arrangements for replacement.

After the crime, the crime scene investigation, forensic examination, and detective inquiry work proceeded in unison.

Actually, although the impact of this case is severe, it's not complex from an investigative standpoint.

Disposing a body on the street, with cameras on both sides, even if everyone entering and exiting Folk Street is checked, the suspect can still be found.

For now, finding the suspect seems a bit easier.

"Focus on checking all vehicles entering and exiting Folk Street last night, especially in the latter half!"

The work assignment was rapid, and relevant vehicle information was successfully locked in quickly.

A total of fifty-one vehicles, over a hundred detectives, set off immediately.

Crime Scene Investigation Office.

While front-line detectives were out in action, Lu Chuan wasn't idle in the back either.

Dismemberment cases are rather unfriendly to crime scene investigation.

Because every body fragment must be photographed for the record.

This work obviously couldn't be completed at the location of body fragment discovery, only done back at the base.

Fortunately, Shen Yan also needed to examine the body, and working with two people didn't feel tiring.

Snap!

After taking another photo of a body fragment, Lu Chuan straightened up slightly, seeing that two-thirds of the work was done, he breathed a light sigh of relief.

"The height of your dissection table isn't suitable; working hunched over is tiring."

Shen Yan was marking and examining the body fragments: "That's because you are tall, the dissection table height has regulations."

Lu Chuan smiled and continued working.

Picking up a fragment around the waist and abdomen, Lu Chuan was about to take a photo, but suddenly stopped.

"What's wrong?"

"This... trace... seems a bit off."

Lu Chuan carefully placed the body piece on the dissection table, under bright lights, revealing a speckled stain.

The mark appeared brownish, with regular edges, like a small circle.

"A stain?"

Shen Yan looked at the mark, as a forensic doctor, Shen Yan's professionalism was indisputable: "Is it... bloodstain?"

Human blood changes significantly in different environments and time frames postmortem.

Especially to professionals, the size, color, and shape of these stains hold special significance.

"Could it be rubbed off from other body fragments?"

Lu Chuan pondered for a moment, shaking his head slightly: "This is a dripping bloodstain, I haven't seen it on other body fragments."

The corpse was cold-stored in low temperatures for a short period, so the blood in the fragments was coagulated, with no blood traces after disposal.

However, over time, the body pieces thawed, with many infecting each other with friction stains.

But what Lu Chuan found now was a dripping bloodstain.

In Bloodstain Pattern Analysis, dripping bloodstains can determine many static scene indicators.

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