I actually have a whole book of these stories--I love hearing how a crook's stupidity got him/her nailed. Here's a couple:
A guy robbing a bank used a great disguise, good enough to have done the deed clean, but his note to the teller was written on his own stationery, with his name and address right on it!
A guy tried to commit insurance fraud by driving his NY-based vehicle to FL, abandoning it at an apartment complex, and filing a stolen vehicle report when he got home. His story blew up when the apartment mgr. in FL noticed the car, and upon examinng it, found the hand-written directions the crook had made for the trip down there lying on the seat.
Some perv set up a camera in a women's restroom at a theater he worked at. When the camera was found, the police found all they needed--the guy had turned the camera on while checking the alignment, and taped himself setting it up!
Plenty more where these came from... Enjoy!