Don't act dumb. A butler died, and I see nothing showing me you're not the one who's guilty!

[Therefore, he must be guilty. Okay, so he's jumping to conclusions here, and he's not even following his gut instinct this time. Still, there was a murder, and if it wasn't D, then he knows for sure that D will at least be able to help him out. Somehow.]

Can't you fly or something?