Natalie: What is it?
Adrian Monk: It's the emergency exit.
Natalie: Yeah?
Adrian Monk: Well, the killer didn't use it. According to this floor plan, he would've had to go all the way around back through the kitchen. It was crowded. It was risky. Somebody could've seen him.
Natalie: Yeah, but he wouldn't use it. The alarm would sound.
Adrian Monk: Exactly. Whoever killed this woman read that sign.
Natalie: And Pablo can't read. Do you think he's innocent? You do, don't you?