Crime Scene Investigation Office.

Old Bai handed a cup of tea to Lu Chuan.

"No need to work so hard, take a break and have a smoke to relax."

Wu Kaiyue sent over a total of 56 images.

By noon, Lu Chuan had processed nearly half of them.

The clarity of most of the images, after Lu Chuan's processing, had significantly improved, almost good enough to use as standard comparison photos for a blacklist.

However, due to the extreme blurriness of some photos, even after data conversion processing, the clarity was still insufficient.

This was like trying to cook without rice; Lu Chuan didn't have a good solution for it yet.

Individually sorted into folders, Lu Chuan grouped the photos he couldn't enhance well together.

Of course, Lu Chuan didn't look into what cases these photos were related to.

Most were large fraud cases, with some old criminal cases where cameras had captured side profiles or unclear frontal shots.

Seeing the nearly thirty photos remaining, Lu Chuan accepted the tea from Old Bai.

"Hmm, taking a break, they haven't said when they need it done by."

Lu Chuan was a bit surprised by the computer configuration sent over by the Image Investigation Team; it was indeed impressive.

Far exceeded Lu Chuan's expectations for an office computer.

The work in the Crime Scene Investigation Office is mostly not busy.

As long as there's no homicide, it's generally a laid-back, work-at-your-own-pace situation.

But once there's a homicide case, working non-stop is the norm.

According to Old Bai, this isn't good for one's health.

Irregular life leads to an early death.

At noon, Lu Chuan didn't feel like eating at the cafeteria.

Honestly speaking, the Criminal Investigation Team's cafeteria food was pretty good.

Three meals a day, the lunch was the most plentiful, with five dishes and a soup, and two cold dishes.

But dinner was lacking, usually the leftovers from lunch.

Midnight snacks were never offered; the Criminal Investigation Team's midnight snack was instant noodles.

Braised, rich broth, chicken and mushroom, pepper chicken, all kinds of flavors of instant noodles.

Lu Chuan missed the right timing; according to Old Bai, at one time there were enough instant noodles to build a wall.

Not needed now, in special circumstances, like a major case, the cafeteria had someone on duty.

Though the chef on duty couldn't make a variety of dishes and soups due to limited staff, at least they could cook instant noodles instead of just soaking them.

Calling on Liu Guodong and the three of them, Lu Chuan drove his Cayenne to have hot pot.

However, April's weather was unpredictable.

The morning was sunny, but by afternoon it was overcast and rainy.

Crime Scene Investigation Office.

Lu Chuan browsed the photos on the computer, streams of data flowed continuously on the screen.

After familiarizing himself all morning, Lu Chuan was getting more adept, significantly speeding up image processing.

Lu Chuan also tried to write some plug-in software.

For example, converting low-resolution photos directly, performing image and data conversion, and automatically enhancing data.

The result was ineffective.

Because each photo's blur level and blurred areas differed.

During the data enhancement process, Lu Chuan needed to manually judge and then choose different methods for processing.

Different methods involved different mathematical transformation formulas.

It's common to use a variety of methods interchangeably.

Sometimes even less common techniques, like Laplace transform and wavelet transform, were needed for independent data processing.

The processing of each image was quite complex, solving all problems with a single plug-in was very challenging.

It seems this approach cannot be widely applied for now.

While Lu Chuan was focusing on the monotonous computer screen, browsing data, Yang Sen stood somewhat melancholically by the window.

The rain was getting heavier, soon blurring his vision.

"What are you thinking about?"

Old Bai nudged Yang Sen's arm.

"Nothing much, just seeing it's raining so hard outside, it would be troublesome if a case happened."

Hmm?

As soon as Yang Sen finished, Old Bai's face changed.

"You're a jinx, talking about cases, quick spit three times!"

Police officers should be firm materialists, but sometimes things were just that strange.

When cases weren't mentioned, nothing happened.

But as soon as it was casually brought up, a case would appear.

Yang Sen obviously realized what he just said.

Slap.

He slapped his own mouth: "Spit spit..."

Bam!

Before Yang Sen could finish the last "spit," the office door was slammed open.

It was Liu Guodong.

Old Bai and Yang Sen stiffly turned their necks, looking at Liu Guodong's anxious face, exchanged glances, and said in unison, "A case?"

Liu Guodong was slightly taken aback, he had just received the notification, who told them?

"How did you know?"

Yang Sen wished he could slap himself again.

"What the heck is this."

Old Bai shook his head helplessly, "Is it a big case?"

Liu Guodong nodded, "A body was found by the Bailan River, we have to go take a look."

"Bailan River?"

Yang Sen's face turned even more grim.

Why did he think of a case when looking at the heavy rain outside just now?

It's because if a case occurs on a rainy day, it's very difficult to preserve many pieces of evidence.

The rain could wash away most of the traces left by the perpetrator, or even bring in items not belonging to the scene.

Three years ago, in Tianzhou City, a homicide case was discovered right after heavy rain.

The body was found lying in a roadside drainage ditch.

After the storm, all traces at the scene were wiped clean, leaving only a handkerchief in the deceased's pocket.

In this era, who still uses a handkerchief?

Thus, police quickly identified a sixty-year-old man from a nearby village through the handkerchief during their investigation.

Because the crime scene was washed clean by the rain, traces left by the perpetrator were completely erased, leaving only the old man's handkerchief in the deceased's pocket.

Logically, the old man was highly likely to be the perpetrator.

Plus, the old man knew the deceased, and they were neighbors who had recently quarreled over courtyard fencing.

Consequently, the old man naturally became the prime suspect in the murder case.

The old man lived alone, so no one could verify if he was home when the deceased died.

Back then, the police took mandatory measures against the old man.

After all, how could the deceased's pocket inexplicably contain the old man's handkerchief?

But in reality, the old man's handkerchief had been lost three days prior.

The rain had swept the handkerchief initially left in the drainage ditch into the deceased's pocket.

However, when the old man mentioned the loss of his handkerchief, no one believed him.

If the murder weapon hadn't been found, the case would likely have been closed already.

Later, the Tianzhou City Criminal Investigation Team discovered a bloodstain on the deceased's rice bag at home.

Then they found the murder weapon inside the rice bag, and by collecting the fingerprints on it, confirmed the killer was the deceased's wife.

Otherwise, that old man might have been wronged back then.

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