Zachariah would have smiled, pointed out the difference between depending on and using what favors you can get, would have laughed a lot at the thought of angels giving a damn about the police.

Instead he just nods, and whisks Kevin from the chair to neatly turned-down bed in the next room. "You're quite welcome," he answers, "But you don't really need to thank me." He's only doing his job, after all. Whatever it happens to be at the moment. "Are you going to be able to fall asleep after all that, or should I send you off?" He makes a vague gesture, wiggling his fingers slightly to denote flagrant use of angelic powers. If Kevin is exhausted Zachariah may as well let him fall asleep naturally, but if his mind would torment him with fragments of the evening, they may as well skip that part.