Don't kill anyone. Not like this, not so fast, you can't use stabbing people as a solution to being confronted. You're better now, remember? Certificate says so.

"That's a useful thing to know. Thanks for the coffee, who knows, maybe you'll get hooked by a mystery." Punning is cheap, but it amuses him nonetheless.

He stands up, straightening his jacket and tucking in his chair. "Later, 'gator."