The unscrupulous detective in Conan

Chapter 1299 Our gray cat is still the cutest...

During the testing, everyone except Fujino was taken back to their respective rooms.

Since no DNA comparison is involved, the test results are displayed immediately.

None of the knives that were searched showed any fluorescent reaction to the bloodstains.

This puzzled Yamamura Misao for a moment: "There's no blood on these knives. Could it be that the murderer hid them?"

Fujino chuckled softly from the side: "Or rather, these things have already been cleaned."

"Huh? What do you mean?"

Yamamura Misao was taken aback and couldn't help but feel puzzled.

Luminol is one of their most useful tools for identification.

What if you can't find the scene?
Spraying luminol...

What if we can't identify the murder weapon?
Spray luminol.

Although I don't use it often, it really comes in handy at crucial moments.

Puzzled, he continued, "I've never heard of cleaning before. After all, luminol reagent is used to detect iron in blood; it's extremely sensitive. Even a tiny bit of blood will cause it to glow..."

"Indeed it is."

Fujino was quite satisfied with Misao's theory lessons.

Although he's a bit inexperienced, he still understands the most basic principles of criminal investigation.

Otherwise, how could he have become a policeman and passed the professional civil service exam?
So he explained, "Clothes can be cleaned by using alcohol and toothpaste with cold water, and bloodstains on items can be cleaned by using toilet cleaner and lingerie detergent."

Yamamura Misao was even more stunned, then promptly asked out of curiosity, "Why?"

"Of course, it's because blood is mainly composed of blood cells and plasma, and the main component that causes the luminol reaction is hemoglobin..." Fujino explained directly, "Cool water can prevent protein coagulation, alcohol can destroy proteins, and toothpaste can remove dirt, grease, and suspended particles from the fabric after it is abraded. Once the hemoglobin is destroyed, there will be no luminol reaction."

"The same goes for toilet cleaners. The strong acid in them can destroy the protein structure, while lingerie cleaners can dissolve the protein. For items like knives, using lingerie cleaner alone is enough to remove the above reaction."

Yamamura Misao fell silent for a moment upon hearing this: "..."

So, Teng-ge, how do you know so much?

If those criminals heard this, what would happen?
Why do I get the feeling that you know these things, and that you're a little bit frivolous?

You must be a detective, how do you know these things?
Even murderers probably don't know this much...

Well, detectives should know these things, otherwise how can they solve cases?

He truly deserves the title of a famous detective.

After a moment's thought, Yamamura Misao hesitated and said, "So, the murderer may have already cleaned up the murder weapon he used to kill people?"

"That's not necessarily true, it's just one possibility."

Fujino stared at the murder weapon that had just been examined: "In such a short time, it's almost impossible to quietly remove the bloodstains. I've also checked the bathroom; there's no underwear cleaner or anything like that, and of course, no drain cleaner either."

Shan Cao, who has an elderly grandmother at home, understands this quite well: "After all, the elderly are more conservative, so of course they wouldn't have something like this."

"But Brother Teng, since the murderer didn't clean the murder weapon, then...?"

Yamamura Misao was clearly a little confused and didn't quite understand why Fujino wanted to bring this up.

Fujino looked at an axe on the ground and squatted down: "Do you see the marks on this axe?"

"I see...it looks like it's still quite deep."

Yamamura Misao pondered for a moment, then suddenly realized and said, "Brother Teng, are you saying that the murderer is the person who used this axe shark!"

Yamamura Misao's face suddenly paled, and he swallowed hard: "The notch on this axe was actually made when chopping bones while killing people?"

Fujino immediately gave a deadpan remark and said, "The fact that the luminol reagent wasn't detected means that this isn't the murder weapon."

"That……"

"Don't you think this mark looks very new?"

Reminded by Fujino, Yamamura Misao pondered, "It does look very new, like it just cracked open..."

"But what does this have to do with the case?"

Fujino calmly explained, "Anything unusual that appears at the crime scene could be a clue pointing to the murderer."

"For example, the marks on this axe might have been left by the murderer."

Yamamura Tsao nodded: "So, we should go and ask the old lady about the cut on the axe now?"

"correct."

Just then, a police officer walked over quickly with a box in his hand: "Officer Yamamura, we've found a knife with a red handle!"

"It seems to be the knife that the child mentioned!"

"what?"

Upon hearing this, Yamamura Misao took the box from the police officer, opened it, and saw a knife inside that had been sharpened to an exceptionally sharp point, with a shiny, translucent blade.

Yamamura Misao murmured, "The red hilt must be the knife the child was talking about, but why is the old woman pretending to be confused?"

"Just ask around and you'll find out..."

The two people went to the old lady's room.

The old lady was sitting inside the room.

Shan Cuncao took out a knife and showed it to the old woman: "What's this knife? Didn't you just say you didn't have this knife?"

"I just forgot."

The elderly woman continued to use her age as a shield: "It's normal to forget, after all, I'm already so old, how can I be as good as you young people?"

Yamamura Misao: "..."

He really didn't know how to refute the old lady's statement.

Yes, it's understandable that the old lady has poor memory at her age, right?

What can you do with that old lady?

Having lived to this age, my resistance to cataracts is definitely at its maximum...

Even if they are arrested, there's still the worry of dying in detention.

If I were to die in detention, that would be a real problem.

Compared to the young and seemingly greenhorn Yamamura Misao, Fujino was much more adept at dealing with older people.

He changed the subject and asked, "Hey old lady, why does your axe have a new chip?"

"gap?"

"Yes, when we looked at it just now, we saw a notch in the middle of the axe."

Fujino responded with a smile, lowering his voice slightly: "This axe looks very well maintained. You must use it to chop firewood, right?"

"Yes," the old woman replied, then frowned and said, "That axe is the one I use specifically for chopping firewood. It didn't have any chips when I chopped firewood yesterday..."

"I haven't used this axe to chop anything else, so how could it have a chip?"

"That's it..."

"Then you rest first, ma'am, we'll go investigate something else."

Fujino nodded in agreement and led Yamamura Misao out of the old woman's room. Yamamura Misao looked puzzled and said, "It seems the culprit made this hole, but what was that guy doing to make a hole in the axe...?"

"That's not clear..."

Fujino walked ahead, stroking his chin as his brain began to work.

It's now confirmed that the two people at the scene were the ones who killed the person.

After all, it's a classic three-choice question; excluding the elderly lady, that leaves only those two.

As for external intruders, that will absolutely not happen.

In the world of Detective Conan, there are very few escaped criminals at crime scenes where Conan is present.

They were basically subdued on the spot.

After leaving the old lady's room, I went downstairs.

The two of them then saw two small figures.

It was none other than Haibara and Ayumi.

At this moment, one of them stood helplessly with her arms crossed, while the other was holding a cup and talking about something.

Fujino could hear her saying something like, "The fish drank water... and died of thirst..."

He couldn't understand why the fish would die of thirst.

Do fish drink water?

They seem to drink water, but those are deep-sea fish. Freshwater fish don't drink water because the water seeps into their bodies while they're in the water.

By the way, soaking the fish in the marinade beforehand allows the flavors to penetrate the fish meat, just like marinating regular meat. The marinade gets absorbed into the meat cells...

Looking at the two children, Yamamura Misao asked in confusion, "What are you doing here? Didn't I tell you to wait in the room?"

Holding her water glass, Ayumi said in a dazed and innocent voice, "But the goldfish is about to die of thirst!"

Yamamura Misao, of course, knew that fish don't drink water: "So, how can fish drink water?"

Ayumi pointed to the fish tank: "But the water level is lower today. It was just as high yesterday. Look, the water level in the tank is completely different now, much lower!"

Yamamura Misao scratched the back of his head: "It probably leaked by accident, or maybe it evaporated or something. How could goldfish drink water..."

"Yes, goldfish don't drink water."

Ai Haibara stood to the side with her arms crossed. "But why is there less water in the fish tank? What could be the reason? Could it be due to evaporation or a leak?"

"But I don't see any leaks in this fish tank..."

"Speaking of which, when you lie in the bathtub while taking a bath, the water level increases, and when you get out, the water level decreases."

As she spoke, a slight smile played on her lips, and with a cute, girlish tone and a bewildered curiosity, she continued, "It's really strange..."

"Could it be that something is missing from the fish tank?"

Yamamura Misao still looked puzzled: "Something's missing..."

"It's probably a rock."

Fujino glanced at the fish tank and immediately understood what Ai Haibara meant.

It must be one of the stones inside.

When the gray cat turns into a cute cat, it definitely means there's something it needs to remind itself of.

This is strikingly similar to Conan's "Are you there?"

But compared to that little brat Conan...

Our gray cat is still the cutest.

Fujino couldn't help but reach out and stroke her brown wavy hair a couple of times; it felt as smooth and soft as ever.

Ai Haibara felt a slight chill run down her spine, sensing a strange and unsettling feeling.

She coughed softly, reminding him, "Speaking of which, there are quite a few kinds of stones in this fish tank..."

"I heard about it from that Uncle Andarai before."

"The stones here include quartz, mica, and obsidian!"

Ai Haibara's tone shifted slightly as she chuckled, "I heard from Uncle Adachi that obsidian was used quite often in the past..."

"It seems to have been used as a weapon?"

"After all, obsidian is very sharp and hard..."

Fujino looked at Ai, who was pretending to be silly and cute, and felt a little helpless.

This little helper really went to a bit too far to remind herself...

Hmm, I'll treat her to a good meal when we get home.

Fujino thought to himself, then looked at the fish tank again: "If that's the case, the murderer might also have used obsidian to kill him."

Yamamura Misao, standing nearby, exclaimed "Huh?" again, not understanding how Obsidian could kill people.

Fujino also didn't quite understand the idea of ​​using obsidian to kill someone.

If Ai Haibara hadn't brought it up, he really wouldn't have thought of this through reasoning alone.

After all, who would have thought that the other party would take a liking to the obsidian as soon as they arrived, find out the location of the axe, and then secretly smash the obsidian to kill someone with it?

Is this an operation that a human could even conceive of?

Okay, in the world of Detective Conan, nothing is surprising...

Not understanding is one thing, but that doesn't mean it's unacceptable.

Having accepted the outcome of the crime, Fujino, along with the murder weapon, explained: "Obsidian was once used as a weapon in Japan. After all, obsidian is very hard, and once it is slightly broken, the fragments can be used as spearheads, arrowheads, or even knives."

"Although it is too hard and therefore lacks flexibility, making it easy to break, it is perfectly fine to use it as a disposable killing tool."

"The axe was probably used to smash the obsidian, but because obsidian is harder than the axe, it left a dent."

"After smashing down the obsidian fragment, he hid it, then killed someone, and finally threw the fragment back into the fish tank."

Upon hearing this, Yamamura Misao suddenly realized: "So, the reason the water level dropped is because the obsidian's volume and mass changed after it was smashed?"

"That's it."

Fujino nodded, then continued to pat the gray cat's head: "But it's all thanks to Ai's reminder, otherwise I wouldn't have thought of this."

Ai Haibara simply nodded obediently.

Then she turned to Ayumi next to her and, seemingly unintentionally, shook her head slightly and rubbed her hair against her like a real kitten.

Then I saw Ayumi's eyes filled with anticipation, as if she was a little envious of Ai-chan.

So, concerned about her child's feelings, Gray's mother continued in a calm yet gentle tone, "If Ayumi hadn't brought it up, I wouldn't have thought of this either."

"Ayumi is amazing too..."

Fujino chuckled, bent down, and placed his other hand on Ayumi's head, giving it a good rub.

"Ok!"

Ayumi's face was full of a cheerful smile, like that of a little girl.

(End of this chapter)