Adrian Monk: What happened? Was she threatening to tell your wife? Did she want money? All we know for sure is that you wanted her gone. Working on this show, on this serial killer story, gave you the perfect opportunity.
Captain Stottlemeyer: It's true. You had access to everything, all the stuff we kept from the public.
Lieutenant Disher: The killer's M.O., the lipstick.
Adrian Monk: Here's what happened. You knew the police were planning to raid Thurman's studio in the morning. That night, you went to Kate Kindel's apartment. You told her you wanted to take some pictures. After the photo session, you got down to business. You took her lipstick, because that's what Douglas Thurman would have done.
Lieutenant Disher: The Lipstick Assassin.
Captain Stottlemeyer: Randy.
Adrian Monk: The next morning during the raid, you planted the roll of film. It would look like Kate was just another client, just another victim. It was a perfect plan, framing a serial killer.
Natalie: Yeah, you should have watched your own show, Mr. Novak. You can't beat the man.