Captain Stottlemeyer: You can turn that off.
Lieutenant Disher: That's your bedroom.
Adrian Monk: It's not her bedroom. It's a replica. It's a duplicate. Here's what happened. You rented this truck under your maiden name and went to work. You duplicated everything. The furniture, the computer, the curtains, even the pictures. You must've been planning it for months. You began talking to the captain every night, from your bedroom at 6:30. Except for last Friday. Last Friday, you were talking from a parking lot a couple of blocks from that house in Novato, from a robot... uh, satellite.
Natalie: Wireless internet.
Adrian Monk: Whatever. That night, you chatted with the captain like you always did. You fooled him. You fooled me. You fooled everybody. At 7:00, you signed off and snuck into the house. You knew Sean Corcoran had an appointment there at 7:15. All you had to do was hide and wait. It worked. Except for the part about the truck getting towed. That was a tough break. When were you gonna go pick it up? The next time Leland left town?
Linda Fusco: How did you know? [Monk picks up a pen] A pen?
Adrian Monk: The night we talked, you put the pen down on the table. I remember. And it rolled a little. But yesterday in your bedroom, in your real bedroom, it didn't roll. It just stayed there. I couldn't figure it out. And then it hit me. On the night of the murder, your bedroom must've been on a slant. You parked on a hill.
Linda Fusco: I parked on a hill.