Hiroo Tsuchio's fat body trembled.
"Mr. Lawyer, I don't know what you're talking about," he said with a forced smile.
"You don't have to pretend."
Keisuke stared directly into his eyes.
"The person who wanted to kill Tokatsu Junya was indeed Nanatsuki Koshimizu."
Using the excuse of going back to his room to get cigarettes, you went to Room A to check the situation. Tokatsu Junya was already completely dead, and you exited through the window.
You sealed the window with adhesive and waited outside until it was completely dry.
"That's why you were completely soaked at the time—because you waited in the rain for a long time."
Keisuke finished speaking in an orderly manner.
During that time, he kept watching Hiroo Tsuchio's eyes.
As he described the situation, Hiroo Tsuchio's demeanor became increasingly nervous.
His pupils dilated, his arms rested against his legs, and his fingers were stiffly straightened.
These microexpressions constantly revealed his inner anxiety.
Keisuke smiled and said, "What do you think, Mr. Hiroo Tsuchio? Am I right?"
"T-This... This is just baseless speculation!"
The fat man suddenly slammed the table and stood up abruptly.
"What proof do you have? You can't just say I killed that person! Aren't you a lawyer? How can you be like those trash detectives, throwing random accusations at people?"
"No, no, no. Don't compare me to those ridiculous detectives."
Keisuke raised a finger and waved it gently.
"Those detectives can only observe a crime scene with their eyes and use outdated logical analysis. Their methods are full of loopholes, and wrongful convictions frequently occur. I, on the other hand, rely on modern investigative technology and have solid evidence."
Keisuke opened his briefcase, took out a document, and tossed it in front of Hiroo Tsuchio.
"This is the account information you opened at Mizuho Bank in Tokyo. It includes your income and expenses over the past six months."
Hiroo Tsuchio's face was covered in sweat as he grabbed the document in front of him.
His expression trembled, and his fingers clenched so tightly that his knuckles turned white.
"These records show that you've been in debt for the past six months and have almost no savings. However, right before the deserted island incident, you received two sums of money. One was a 500,000-yen payment from Koshimizu Nanatsuki for labor fees. The other was a massive sum of 5 million yen..."
Keisuke smiled.
"Mr. Tsuchio, can you explain the source of this unknown sum of money?"
"T-This... This..." Tsuchio Hiroo hesitated for a long time before saying, "I won it in the lottery! Isn't that possible?"
"That's impossible."
Keisuke tossed another stack of documents in front of Tsuchio Hiroo.
"These are the records of all lottery winners in Japan during the period when you received that money. There is no one named Tsuchio on the list."
"Then... it was borrowed from my relatives and friends..."
"That's also impossible. Here is the financial information of everyone in your social circle, and their account balances have remained relatively unchanged."
...
"You investigated this much?"
Hiroo Tsuchio stared in shock at the densely packed information in front of him. He swallowed hard, his scalp tingling.
Keisuke smiled.
"Of course, I have a diligent employee who works hard and doesn't ask for a salary."
Far away in Kumemon's office, Ai was lying on the couch playing on her phone when she suddenly sneezed.
Hiroo Tsuchio lowered his head and gritted his teeth.
At that moment, he suddenly remembered something and raised his head.
"What does this prove? Is this the 'evidence' you're talking about? Hahaha! This doesn't prove I killed anyone!"
He pointed at Keisuke and laughed wildly as if he had been saved from a desperate situation.
"Of course, this isn't proof, but it's a piece of the puzzle."
Keisuke shrugged and once again placed a document in front of the fat man.
"This is a forensic report I obtained from the Metropolitan Police Department's Forensic Division."
"The Forensic Division used advanced PCR technology (Polymerase Chain Reaction) to discover that the hammer used as the murder weapon contained DNA from two people. One of them was you. There were also traces of your DNA on the window."
"This is physical evidence. How do you explain it?"
"T-This... This is impossible!"
Hiroo Tsuchio slammed the table and stood up abruptly.
"That day, I clearly wore gloves, and I checked my hair and everything else. How could there possibly be..."
Halfway through his sentence, he suddenly realized something and quickly covered his mouth.
He looked at Keisuke with horror and anger.
His face was practically screaming, You little bastard, how dare you trick me?!
"Don't worry, Mr. Tsuchio. Even if you let that slip, this isn't a courtroom. And even if it were, it wouldn't matter."
Kumiko's smile remained unchanged as he raised a finger, signaling for him to quiet down.
Hiroo Tsuchio was confused and stared blankly at Keisuke Kumiko's face.
Something about the way the other party was acting seemed different from what he had imagined...
At that moment, he suddenly felt lost about why Keisuke had asked him to come here.
"Are you trying to say that you committed the crime while wearing gloves so that you wouldn't leave any evidence?"
Keisuke raised an eyebrow.
"Mr. Tsuchio, you didn't go to school, did you? You might not understand how advanced modern forensic technology is. Besides fingerprints, any other traces you leave behind can be detected."
The corners of Kumiko's mouth curled up slightly.
"For example... sweat. PCR technology can extract relevant personnel's DNA from sweat. This is absolute physical evidence."
Hiroo Tsuchio expression changed drastically.
In reality, although he had worn gloves while committing the crime, he had inevitably sweated due to nervousness.
Perhaps, at that time, his sweat had been transferred onto the murder weapon and the window.
And the forensic report in front of him was irrefutable proof.
As he thought about this, Hiroo Tsuchio couldn't help but clench his teeth.
Damn it, how did this happen...?
At that moment, watching the man bow his head in struggle,
Keisuke Kumiko's lips curled into a strange smile.
The other party seemed to believe him.
But in reality, Keisuke had lied.
PCR technology can extract DNA from tiny traces such as blood, hair, and skin fragments found at a crime scene.
However, this technology is simply incapable of extracting DNA from sweat.
Since sweat doesn't contain human cells, its composition is solely inorganic salts, water, and sugars.
This so-called forensic report had been forged by Ai at Kumiko's request as "evidence" to deceive the other party.
There are two types of bad people in this world: smart and bad, and stupid and bad.
Stupid and bad people will always be deceived by smart and bad people.
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(End of Chapter)