I've heard about this, on my interview, Capt... oh wait, this isn't an interview question?
Damn.
Well, you got his i.d., call in sick for him. The problem is when its border line. You hardly know the guy, you might not have been with him wherever he was the night before, you're sitting there wondering, is he? I know when a buddy is plowed, I don't know as quickly when it's someone I hardly know.