Prank
Matsuda giggled breathlessly as he watched L sit down to eat his morning confections. Between a thumb and forefinger, he carefully picked up a sugar cube.
Or what he thought was a sugar cube.
Matsuda couldn't help but let out another giggle. This was gonna be really good. He could see that L was already examining the cube suspiciously, but finding nothing to prove anything was wrong, let the sugar cube drop into his tea. Then another. And another. Until the liquid was a brownish mass of goo.
L put it to his lips, taking a great big sip. And immediately spit it out all over his computer screen. Matsuda couldn't hold it in anymore, he kept laughing and laughing. But as he saw L's eyes turn to him, he stopped. He didn't think he'd ever seen those big bulging eyes so full of hate.
"You. Replaced. My sugar. With salt?!" the detective yelled angrily. The entire team went silent, eyes darting in between the bumbling idiot and the livid mastermind.
"I-it was just a pr-prank, R-Ryuuzaki...I d-didn't mean anything by it..." Matsuda stammered, trying to summon a smile.
L turned sharply on Raito, who'd been calming ignoring the situation from the start. "You! Your chance of being Kira is now below 0.0089 percent! You on the other hand!" he turned again to Matsuda. "You chance is over 80! Arrest him!"
Souichiro sighed, talking Matsuda by the shoulder. "W-wait, you guys aren't really gonna arrest me... are you?"
"It'd be best to just come with us."
Raito glanced at L. "It's April fool's day." was all he said.
OWARI
lol. I was eating marshmallows and I thought of this.