[Monk is on the phone as Sharona races his fast new car through the streets of San Francisco]
Adrian Monk: Captain, yes, it was Lester Highsmith. He's definitely the guy. Dog, dog! Yeah, right. We found his ex-wife's suicide note. The real one! That's what this whole thing has been about- Trolley, trolley, trolley! Aah! Look out! Lester and Marlene were, aah! Lester and Marlene pulled an armored car job two years ago. Right, and they were planning another one. But Marlene was racked by guilt. She couldn't go through it again. She spilled her guts out in that suicide note. You missed it! What are you... Whoa. Listen to this. "Two years ago, in Cincinnati, I helped my husband stage an armored car robbery. We killed the driver. And now he wants us to do it again Friday, 10:00 A.M., at the Mountain View Industrial Park. I'd rather die. May God forgive me." Before Marlene killed herself, she called Lester and left him a message. She must've mentioned the note she had just written. Lester knew that note could send him to death row, so he had to recover it before we found it. Listen to this. That was a red light. He got to her building, but he was too late. Some cops had already shown up. He couldn't go inside. He had to stop them from finding that note. He needed a diversion something serious enough to draw the cops away from her building. But what?
Captain Stottlemeyer: Shooting me.
Adrian Monk: Exactly! He drove a few blocks and shot the first cop he saw. He knew every officer in the city would respond, including the two cops that were outside Marlene's building, which meant he had plenty of time to go back to her place, destroy the real suicide note, and replace it with one of his own. A stop sign is not a suggestion!
Sharona: Yes, it is!