robinonadderall | Beacon Hills High School | A short time later that night

Stiles	Stiles was quiet the whole way to the school but he knew that Derek could probably smell how nervous and freaked out he was. "You're going to hate me for this," Stiles started once the car stopped. "But I need to check something in there by myself. I swear, if I'm right I'll tell you but I just...I don't want to jump to any insane conclusions until I'm sure."
Derek	Oh, bringing up the big ol' T word to Derek Hale. This'll go well for everyone involved. Derek stared at him, mouth in a tight line as any question he might have asked was shoved back down. The fight left his eyes and his shoulders dropped like he was giving up. Then he nodded.
Stiles	Stiles leaned over far enough that he could nudge his nose against Derek's jaw like he was a puppy or something. "Thank you."
Derek	Derek grabbed hold of Stiles' neck, keeping him close for a moment longer like that would really stop whatever it was that was going to happen to destroy this. Really now, Derek ought to know better than to trust any happiness in his life.
Stiles	Stiles gave Derek a brief kiss before pulling away and opening the car door. "I'll be right back." Well that was nice and foreboding, wasn't it?
Derek	This was a million horror movie cliches all rolled into one, Stiles. This right here. Derek just nodded again, not able to get rid of the pit his stomach.
Stiles	To be honest, Stiles felt like he was going to throw up the entire time he was walking down the school hallways to get to the chemistry room. His keys were back in his hand and he was gripping on to the mysterious one so hard that it was cutting into his hand. He knew that he hadn't been sleeping well since the night Barrow died, even worse than he usually did. It would be easy to think insane thoughts when you were running on that little sleep but this? This was something he felt sure of. The door to the chem room was unlocked, which was unsurprising to Stiles. The door to the supply closet had been re-locked after the police finished with it, which was even less surprising. That was good. Now he could be sure. He took a deep breath before slipping the unknown key into the supply closet lock. It felt like his heart was sinking into his stomach when it fit. The sound of the door unlocking and creaking open was deafening in the silent room. Stiles let go the doorknob, ignoring his own shaking hands as he turned his attention to the chalkboard. The numbers written by Barrow's accomplice were still on there, along with Lydia's handwriting spelling out Kira's name. Trying to keep his hands as steady as possible, Stiles picked up a piece of chalk and copied the numbers on the board. The supply closet door told him what he already knew. The matching handwriting on the atomic numbers just confirmed it even more. He was the one that set Barrow free. He set him after Kira. Stiles swayed where he stood and then everything seemed to go dark for a moment.
Derek	Derek's hands on the steering wheel caused the material beneath them to creak ominously as he glanced once again at the clock. It had been more than enough time for Stiles to get wherever he needed to go. Right? He stared at the clock again, listening carefully for a familiar heartbeat in the empty school.
Stiles	Stiles couldn't really say for sure what had been going on the last few minutes but he attributed that entirely to shock. When he was fully aware of what was happening he was moving through the hallways of the school, heart beating fast and bordering on a panic attack. "Derek!" He was freaking out, making it all the way to the car might not be happening right now.
Derek	Did you want a worried werewolf running through the school at full tilt? Because that was exactly what you were getting, Stiles. He was alone in the building, Derek could hear that and yet still with the hurrying. "Stiles?"
Stiles	Stiles immediately was running towards Derek when he caught sight of him, grabbing on to his jacket with a death grip as soon as he was within reach. He was out of breath but that didn't stop him from rambling immediately. "I was right, I was right, the key--the girl at the party, the one that kissed me she was talking about phosphors and how I had chemicals on my key." He'd make sense in a minute. Hopefully.
Derek	Please do not bring up the girl you were obviously leaving Derek for, Stiles. With all that chemistry you had. What? Well, we thought the joke was good. "Right about what," Derek ground out now that it was clear Stiles was safe.
Stiles	"That made me think of the chemistry closet and the fact that someone had to let Barrow in," Stiles said. "Derek, it was me. I did it. I don't know how I did it, but I told him how to hide in the school, I told him to kill Kira, I did all of it."
Derek	"...what?" Explain yourself, Stiles.
Stiles	"I can prove it," Stiles said. "Come to the chem room, I can show you." It sounded nuts, being so eager to show somebody he tried to kill a teenage girl, but if he was dangerous Stiles needed to have something done. He didn't want to hurt anybody.
Derek	Derek was going to just keep staring at Stiles and his more than just slightly unhinged insistence on being the mastermind behind everything. "Alright," he said, taking a breath before grabbing Stiles' elbow to go with him there.
Stiles	The classroom looked exactly the same as when Stiles had been in there just a few minutes ago. Well, except for some key differences. "It's gone," Stiles said, looking at the completely blank chalkboard. "It was--it doesn't matter, I still have the key." Stiles didn't even seem to notice he was mumbling to himself and looking frantic and disheveled. He was too busy fiddling with his key ring...which now seemed to be missing a key. "No, it was here. I just had it, I swear to god." He jerked his head up at Derek. "I showed it to you, right? Didn't I show it to you?"
Derek	"You showed me your keys," Derek admitted, reaching over to cup Stiles' hands with his own. "Stiles."
Stiles	"The message left to Barrow spelling Kira's name was right there on the board in my handwriting," Stiles said, shoulders slumping. "And I had the key to the chemistry closet. It was me, Derek."
Derek	"Okay," Derek said, listening to Stiles' heart beat again. He nodded, moving one hand over to touch Stiles' neck, thumb brushing against his jaw. "Okay. What now?"
Stiles	"Do you believe me?" he asked. "Do you honestly believe me? I need to know." Because that would help him decide whether to go to the cops or to the hospital.
Derek	"I don't want it to be you," Derek said finally. Which wasn't an answer at all.
Stiles	"I think--" Stiles stopped short, looking at the perfectly clean chalkboard. He knew he had seen the message earlier, remembered writing on the board himself and yet now it was like nothing had happened. Nobody could have gotten in or out in that time. If Stiles went to the police they'd think he was crazy. And they may have been right. "I think I need to go to the hospital."
Derek	Derek nodded, leaning forward and up onto his toes enough to kiss Stiles' forehead. "If you're right," he said, steeling himself to this. "If this is you. I'll stop you." Wow. How romantic, Derek.
Stiles	If this was any other situation Stiles would laugh, because that was such a Derek reply to have. But the fact that it could come to that kept him quiet. "Thanks," he murmured. "Can we--can we just keep this between us for now? And Scott. I'm incapable of not telling Scott."
Derek	The look Derek gave him was one of 'yeah, because I'm so chatty' but he nodded anyway. "You can call him in the car."

[Taken from TW 3x16 "Illuminated" and preplayed with the lovely

justlurkinghere. NFI, NFB but OOC is fine]

Beacon Hills High School | A short time later that night

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