A lady that works for my wife had somebody break into their house last week. They kicked in the garage door and got into the kitchen through the door connecting the garage and house which they never bothered to lock. Didn't take much, about $1k in jewelery. The perp left a perfect shoe print on the garage door and a receipt from burger king on the floor of the kitchen.
The cops weren't as enthusiastic about investigating this as she would have liked, so she went to BK and got their surveillance tapes herself for the day and time from the receipt and matched up the shoes of the people in line to the Nike print. Figured out who it had to be from the tape and passed it on to the cops who were able to get an ID and then arrested the guy.
Found out he had also robbed a couple more places. Don't know if the court system will actually prosecute meaningfully or not, but at least she got some personal satisfaction and will eventually get her stuff back.