Case NOT Closed

Hiroo Tsuchio’s obese body trembled.

“Komemon-san, I don’t know what you’re talking about,” he managed to force a smile.

“You don’t need to pretend,” Kensuke stared into his eyes. “The person who wanted to kill Kotani Renzo was indeed Natsuki Koshimizu.”

“According to the records, she went there at 7:26 p.m., but at that time, she wasn’t able to kill Kotani Renzo. Because the hammer was small, she only managed to knock him unconscious.”

“After she returned to the restaurant at 7:39 p.m., at 8:06 p.m., you made an excuse to go back to your room to get cigarettes and went to check on Kotani Renzo’s room. At that time, because the time was short, the adhesive inside the door frame hadn’t dried yet, so you could take the door frame off again and sneak in.”

“Afterwards, you examined the condition of the deceased and found that Kotani Renzo had not died completely, so you used the same hammer in the room to strike him several more times.”

“After confirming Kotani Renzo’s death, you left through the window, resealed the window with adhesive, and waited outside until the adhesive completely dried. It wasn’t until 9:28 p.m. that you returned to the restaurant, pretending as if nothing had happened.”

“That’s also why you were completely soaked at the time, because you had waited in the rain for a long time.”

Kensuke calmly finished his explanation.

Throughout, he kept looking into Hiroo Tsuchio’s eyes.

As he described, Hiroo Tsuchio became increasingly nervous.

His pupils dilated, his arms pressed tightly against his legs, and his fingers were completely upright.

These micro-expressions constantly revealed his inner unease.

Kensuke smiled, “Tsuchio-san, how about it? Am I right?”

“These— These are just your wild guesses!” The fat man suddenly slammed the table and stood up abruptly.

“What evidence do you have to say that I killed him? Aren’t you a lawyer? How can you randomly accuse people like those rubbish detectives?!”

“No, no, no, don’t compare me to those ridiculous detectives.”

Kensuke raised a finger and gently shook it.

“Those detectives only rely on their eyes and old-fashioned logic at the crime scene deduction, which is full of loopholes and often leads to wrongful convictions. But me? I rely on modern investigative techniques, backed by solid evidence.”

Kensuke opened his briefcase and pulled out a document, tossing it in front of Hiroo Tsuchio.

“This is the account information from the Tokyo Mizuho Bank that you opened, including details of your income and expenditures over the past six months.”

Hiroo Tsuchio’s face turned sweaty as he grabbed the document in front of him.

He looked nervous, his fingers turning white as he clenched them.

“This data shows that you’ve been in a state of borrowing for the past six months, with almost no savings. But before the uninhabited island incident, you received two sums of money: one was a service fee from Natsuki Koshimizu, amounting to 500,000 yen, and the other was a large sum of 5 million yen.”

Kensuke smiled.

“Tsuchio-san, could you explain the source of this unaccounted amount?”

“T-That… ” Hiroo Tsuchio stuttered, sweating profusely. “That’s from winning the lottery! Isn’t that possible?”

“That’s impossible,” Kensuke said calmly, tossing another stack of documents in front of Hiroo Tsuchio.

“These are the lists of lottery winners in the entire Japanese lottery industry during the time when you received that amount. There’s no one with the surname Tsuchio.”

“T-Then, maybe it was borrowed from friends or relatives—”

“That’s also not possible. These are the account details of everyone in your social circle, and there’s no significant change in their deposit amounts.”

“…You investigated all of this?” Hiroo Tsuchio looked astonished at the dense pile of documents in front of him, subconsciously swallowing saliva, his scalp tingling.

Kensuke smiled.

“Of course, I have a diligent employee that is being paid well, it’s normal for me to make use of them to the fullest.”

Meanwhile, back at Kensuke’s office, Haibara was lying on the sofa playing with her phone when she suddenly sneezed.

Hiroo Tsuchio lowered his head, clenching his teeth.

At this moment, he suddenly remembered something and raised his head.

“What does all of this prove? Is this what you call evidence? Hahaha— This can’t prove that I killed anyone!”

He laughed wildly, as if finding a lifeline, pointing at Kensuke.

“Indeed, this isn’t direct evidence, but it’s a piece of the puzzle.”

Kensuke shrugged, once again placing a document in front of the fat man.

“These are the identification reports I obtained from the Forensic Science Division of the Metropolitan Police Department.”

“Through advanced PCR technology (Polymerase Chain Reaction), the Forensic Science Division found that the hammer used as the murder weapon at the time contained DNA from two individuals, one of whom was you. Additionally, there were traces of your DNA left at the window.”

“Now, this is physical evidence. How do you explain that?”

“T-This— This is impossible!” Hiroo Tsuchio slammed the table and stood up abruptly.

“That day, I was wearing gloves and even checked for hair and other things. How could this—”

He stopped halfway, suddenly realizing, and quickly covered his mouth.

He stared at Kensuke with a mixture of fear and anger, his face almost screaming, “You little brat, how dare you try to trick me.”

“Don’t worry, Tsuchio-san, even if you slip up here, this isn’t a courtroom. And even if it were, your slip-up wouldn’t matter,” Kensuke said calmly, maintaining his smile and gesturing for him to calm down.

Hiroo Tsuchio looked uncertain and stared at Kensuke’s face in bewilderment. His demeanor seemed different from what he had imagined…

At this moment, he suddenly felt unsure why Kensuke had called him here in the first place.

“Are you trying to say that because you wore gloves during the crime, there wouldn’t be any evidence left behind?” Kensuke raised an eyebrow.

“Tsuchio-san, have you not read any books? You may not understand how advanced modern forensic technology is. Apart from fingerprints and similar traces, anything you leave behind can be traced.”

Kensuke’s lips curled slightly.

“For example… sweat. PCR technology can extract DNA from sweat, and that’s absolute physical evidence.”

Hiroo Tsuchio felt a jolt of panic. Indeed, although he wore gloves during the crime, sweating due to nervousness was inevitable.

Perhaps, at that moment, his traces stuck to the murder weapon and the window.

And the identification report in front of him was ironclad evidence.

As he thought about it, Hiroo Tsuchio couldn’t help but grit his teeth.

Damn it, how could this happen…

Meanwhile, watching the man struggle with his head down,

Kensuke’s smile widened into a sinister grin.

The other party seemed to believe it.

But in reality, Kensuke was deceiving him.

PCR technology can extract DNA evidence from traces such as bloodstains, hair, and skin fragments at the scene.

However, this technology cannot extract DNA from sweat.

Because sweat does not contain human cells; its components are only inorganic salts and water-soluble carbohydrates.

The so-called identification report was fabricated by Kensuke to deceive the other party.

There are two types of villains in this world: the smart and evil ones, and the dumb and evil ones.

The dumb and evil ones will always be deceived by the smart and evil ones.