Quote from Adrian Monk in Mr. Monk Joins a Cult
Susan Donovan: Could I have that back, please? Adrian Monk: I'm afraid not. This picture is material evidence in a homicide. In fact, I think this is the key to the whole case. This is the motive. This is why you killed her. Here's what I think happened. Amanda Clark was a sex prostitute. Susan Donovan: A what? Adrian Monk: A sex prostitute. Susan Donovan: As opposed to what? Captain Stottlemeyer: Monk, just keep going.