"Ding!"

"Advanced Task: Based on the fingerprint information matched on the corpse, identify the suspect in the Qinghe Amusement Park body dumping case and assist the special task force in solving the case."

As the fingerprint matching succeeded on the computer, Lu Chuan simultaneously received a prompt from the system in his mind.

Meeting Room No. 1, Criminal Investigation Team.

"Fingerprints found on the body?"

Qin Yong was overjoyed with the information reported by Liu Guodong.

Leaving fingerprints on the body, particularly on the adhesive tape marks around the ankles, is highly likely to belong to the perpetrator.

Indeed, reliable work comes from crime scene investigation.

"Discovered by Lu Chuan?"

Liu Guodong nodded: "Just now, when Lu Chuan was collecting trace evidence from the second body, he discovered this fingerprint."

The projector displayed the photo of the fingerprint discovered by Lu Chuan.

"It's quite a coincidence that when solving the Song Kun case, Lu Chuan conducted a fingerprint identification analysis—cases delivered from below."

"At that time, three sets of fingerprints were not successfully identified; there was no target in the fingerprint database."

"But Lu Chuan had an impression of those fingerprints and felt a sense of familiarity when he saw the fingerprints on the corpse."

Qin Yong nodded in acknowledgment. The analysis of fingerprints by crime scene detectives is just like frontline detectives capturing fugitives.

Throughout the Haizhou City Public Security Bureau, it's common every year for suspects to be captured due to various coincidences.

For example, last month, two police officers from the Friendship Road Police Station, after their shift, felt a diner at the restaurant looked familiar while eating beef noodles.

They secretly took a photo and asked colleagues at the station to check. As expected, he was a fugitive theft suspect.

The two officers had only glanced at the photo on a co-assistance notice two weeks earlier, leaving some familiarity.

By chance, they encountered him and captured him after a confirmation.

Liu Guodong switched the projection to a dossier: "The matched fingerprint, although lacking identity information, had related case data."

The fingerprint was connected to an arson case.

"Three weeks ago, an arson case occurred in the jurisdiction of the Huaguang Street Police Station."

The projector showed the case specifics.

"The fire broke out in the archive of a water company."

"The archive of the water company?"

Qin Yong carefully examined the dossier in his hand, puzzled.

This case wasn't seen as a major one.

The materials in the archive were just settlement documents of the water company's projects.

In terms of importance, it held some value to the water company, but economically, it was worth the money of a pile of waste paper.

When the report came in, the Huaguang Street Police Station investigated and found gasoline residues.

It was confirmed that it was arson.

Arson cases, regardless of the value involved, receive some attention.

"After the case was filed, Huaguang Street Police Station spent two weeks investigating but found no leads."

The deliberate arson of the engineering data archive was unlikely for monetary purposes.

Of course, the Criminal Investigation Team had encountered such situations before.

The arsonist might not be an outsider; there was a significant possibility it was someone on the inside.

Engineering data is a fundamental aspect of engineering audits. If someone in the water company tampered with the projects and then burned the data to cover it up, it wasn't impossible.

However, this case occurred as the entire bureau focused on solving the murder case of Song Kun.

It received minimal attention and barely any police input.

Just two officers went to collect a blurry fingerprint; even Huang Qiangmin, the director of Huaguang Street Police Station, didn't make an appearance.

Since its low value didn't result in harm, the case was shelved.

But now, the fingerprint from the case linked to the naked corpse found at the Qinghe Amusement Park site made it different.

"Let's make a trip to the arson scene."

Investigating an arson case is much easier than a serial murder case.

Now, if they solve the arson case, the fingerprint related to the naked corpse case will also have a resolution.

At 4:28 PM.

No. 28 Huaguang Street, where the water company had a standalone two-story building.

The arson targeted the first floor of this building.

Huang Qiangmin was reporting: "At the time, the fire wasn't severe. Once the smoke alarm activated, the sprinkler system started up."

The small building's fire safety features were quite complete, with the archive having an automatic sprinkler system.

"But because the arsonist poured gasoline, almost all the archives were destroyed."

At the arson scene, Lu Chuan had already begun the crime scene investigation.

The scene was chaotic.

On one side, the sprinkler system had destroyed the arsonist's traces.

On the other, someone presumably cleaned the scene post-fire.

Now, the entire site was pitch black, with floor water stains dried up, making significant discoveries challenging.

"Yang, where were the fingerprints collected back then?"

The officer who collected fingerprints then, and Lu Chuan's college roommate, Yang Lin: "On the gasoline can."

Yang Lin opened his phone: "We discovered a gasoline can at the scene, finding a fingerprint on the bottom."

This was something Yang Lin casually discussed with Lu Chuan over a meal, where Lu Chuan shared some fingerprint collection tips.

"I used the post-burn fingerprint collection method you mentioned last time. How about it, buddy?"

Recently, Yang Lin had been doing well at the Huaguang Street Police Station.

He seemed to be specializing in crime scene investigation at the station now.

Since Yang Lin and Lu Chuan often communicated by phone and WeChat, they occasionally talked about fingerprint collection.

Lu Chuan frequently shared tips and tricks with Yang Lin.

While not systematic knowledge, it was enough for general crime scenes.

Yang Lin's fingerprint collection at the arson scene was such an example, though not very clear, was not adhesive tape stuck.

It allowed for subsequent fingerprint identification and analysis.

"Is that gasoline can still around?"

Yang Lin nodded: "It's at the station. I took it back that day."

This academic background provided a rigorous approach to the case, almost subconsciously.

The site offered little more to see, with footsteps scattered post-arson, unknown how many people had entered and exited.

The whole site was damaged beyond value.

Twenty minutes later, Lu Chuan saw the gasoline can with Yang Lin's collected fingerprints at the Huaguang Street Police Station.

Though called a gasoline can, it was actually a blue paint bucket.

It had just been temporarily filled with gasoline.

"Was the source of this can investigated?"

This was the only surviving piece of evidence from the arson case and the only item where the suspect might have left traces.

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