Adrian Monk: Captain, listen. His sister moved two months ago. He is the only man in the world with a motive who wouldn't have known that. Also, look. Look at the knot. It's elegant. In my life, I've only seen one other knot like that.
Captain Stottlemeyer: Yeah, the bomb.
Adrian Monk: He's the guy.
Captain Stottlemeyer: Yeah, but Monk, he's been asleep since May.
Adrian Monk: I know.
Lieutenant Disher: The bomb was mailed three days ago. There's a postmark.
Adrian Monk: I don't know how he did it. But he did it.