Postal Worker: What about the DNA evidence? You can't just ignore that. They found the victim's blood on Perry's knife?
Adrian Monk: How do we know it was Robert Perry's knife? He denied ever seeing it.
Cobb: Of course he denied it. What the hell do you expect?
Adrian Monk: Well, his prints weren't on it.
Cobb: Well, then, he wiped them off, huh? Look, it was in his knapsack! What the hell kind of a detective are you?
Adrian Monk: I'm the kind of detective who wonders why someone would take the time to wipe down the handle, but not the blade.