I really enjoy most of the Monk episodes, but there are a few that I really don't like. This episode was unique in that Monk was so preoccupied with selling his 'art' that he didn't solve the case. I liked that. The shows were following the same formula way too much, and I was starting to get bored with them.
The few episodes I really don't like are the ones that have glaring (to me, at least) errors in Monk's otherwise logical reasoning.
In this one, Bennie, the junkyard owner, was supposedly killed by one of his own booby traps. The trap was a knife embedded in a board which lays flat on the ground, but when the intruder trips a wire or whatever, the board springs up, and the knife goes into the victim's chest. Bennie's helper discovers Bennie impaled on the knife, and calls the police. They remove Bennie's body from the trap. Monk comes in, measures up from the ground to the knife blade (48 inches), then measures up from Bennie's feet to the stab wound (54 inches). He concludes that Bennie was killed somewhere else, by something else.
Okay, so if the knife was IN Bennie's body when he was found, obviously the height would HAVE to match! Unless of course the murderer moved the stab wound...
If anyone can explain how Monk could conclude what he did from that evidence, please do so.