Say I go to a pawn shop (in the USA) and buy a used computer (or even iPod for that matter), and take the new-to-me machine home. When I get home, I find that it has a lot of information on it. Some of it is commercial programming (such as the OS or paid apps), some of it music, and some of it just documents, emails and pictures. Do I own those? Do I have a legal obligation to wipe that stuff out? What happens if I find evidence that the previous owner was doing something illegal? Maybe a picture of him standing in his living room amongst a large marijuana grow operation. How about emails where he's discussing his fraudulent behavior with a co-conspirator? Thanks for your advise!