"He knew exactly what was happening to me, what happened in that house. And he just pretended there was nothing going on. Jackson is the reason Jackson became the Kanima. And it was Matt that controlled him, made him kill. All Derek did was give Jackson what he wanted." Even if it had been, as Stiles said, with the hopes that it would kill him.

"But I can hear it."

ooc: It isn't like they haven't figured it out! :D Isaac gave away clues, and logically, he'd be able to see well enough in the dark... and he'd know Stiles' scent :D