The atmosphere in Courtroom 6 was thick enough to suffocate. This wasn't the quiet, procedural air of a standard trial; it was the heavy silence of a standoff.
Shin Nosakustood at the prosecution's podium, his red suit illuminated by the harsh overhead lights. He looked restored, his eyes cold and focused, showing no sign of the man who had stood on a rain-swept lighthouse gallery just hours before. Across from him, Arata adjusted his tie. He was exhausted, his skin pale from the night in the bay, but his hands for the first time were perfectly still.
"The prosecution has presented a 'Locked Room' murder," Arata began, his voice echoing. "A room with no hidden exits, no extra keys, and a biometric lock that only recognized two men: the victim and the defendant. To the world, this is an open-and-shut case. To the state, it is an impossibility for anyone else to have pulled that trigger."
Arata walked to the center of the floor, holding a small evidence bag containing the amber-colored shard.
"But the law of physics doesn't care about biometric locks. It only cares about cause and effect."
Judge Halloway leaned forward, his eyes narrowed. "Counselor, you are repeating yourself. We have established that the defendant's gun was the weapon. We have established he was in the room. What are you adding?"
"I'm adding the 'How,' Your Honor," Arata said. He signaled to Hana, who tapped a command into her tablet.
The large screen in the courtroom flickered to life. It wasn't the police security footage. It was a high-definition rendering of the ventilation shaft in Evidence Room 4, overlaid with a technical schematic.
"Evidence Room 4 was designed by the Hanagawa Group," Arata stated. "They marketed it as the most secure room in the country. But what they didn't mention in the brochure was that the air filtration system was modified. Not for air... but for conductivity."
Nosaku remained motionless, but his jaw tightened.
"Yesterday, we found traces of a sugar-based polymer in that vent," Arata continued. "When combined with a high voltage surge like the one that occurred during the 'routine generator test' the prosecution mentioned that polymer becomes a bridge. A bridge for a remote-controlled mechanical pulse."
Arata slammed his hand on the table. "The gun wasn't fired by a human finger. It was fired by a magnetic solenoid hidden behind the ventilation grate. The killer didn't need to be in the room. They just needed to wait for Detective Yatsurugi to place his weapon on the designated evidence tray a tray that was positioned exactly in the line of fire by the room's layout."
The gallery erupted. The reporters were leaning over the railings, their cameras clicking like a swarm of insects.
"Speculation!" Nosaku barked, finally breaking his silence. "A fascinating theory, Ōgi-kun, but you have no proof that such a device existed, let alone that it was used. Where is the trigger? Where is the footage?"
Arata looked Nosaku dead in the eye. This was the moment. The "rematch" had reached its endgame.
"The footage is right here," Arata said.
He pulled the flash drive from his pocket the one Nosaku had given him. He didn't say where it came from. He didn't need to.
"This is the internal R&D log from a Hanagawa testing facility. It shows the 'Locked Room' murder being rehearsed. It shows the remote trigger firing a service weapon into a ballistic gel dummy, timed perfectly to a simulated power flicker."
Arata hit Play.
The video was undeniable. It showed the interior of a replica room. It showed the amber-colored polymer glowing as the current passed through it. And it showed the weapon firing with no one near it.
"The Hanagawa Group didn't just provide the tech," Arata's voice rose over the noise of the courtroom. "They provided the murder weapon's shadow. And the prosecution ignored it because the '99.9% Order' was more important than a man's life."
Judge Halloway didn't wait for Nosaku's rebuttal. He looked at the screen, then at the pale, trembling Detective Yatsurugi, and then at the Star Prosecutor.
The gavel came down. It didn't just sound like wood on wood; it sounded like the cracking of a mountain.
"NOT GUILTY."
Arata walked out of the courtroom. The sun was blinding. He pulled out his black notebook and flipped to the first page. Below the circled 1, he drew a slow, deliberate circle around the number 2.
"Two," he whispered.
"You're making a habit of this," a voice said from the shadows of the courthouse portico.
Nosaku was standing there, his red suit jacket slung over his shoulder. He looked like a man who had just lost everything, yet he was smiling a small, genuine, and terrifying
smile.
"The Hanagawa Group is already filing for bankruptcy protection," Nosaku said. "The Director is in custody. You've done more damage in two days than most lawyers do in a lifetime."
"I'm just getting started," Arata said.
"I know," Nosaku replied, stepping into the light. "But remember, Arata... the higher you climb, the more people will want to see you fall. You've solved a murder. But you've also started a war."
Nosaku walked away, leaving Arata standing in the center of a cheering crowd. He looked down at the 898 blank lines remaining in his notebook.
The Zero-Percent Gambit was no longer a joke. It was a reality.
[VOLUME 1: THE ZERO-PERCENT GAMBIT — END]
Next: Volume 2 — The Paper-Trail Assassin