I recently purchased a moped off craigslist and found out the next day that it had been stolen three times. The guy I bought it from gave me a piece of paper with his name and phone number on it as well as his signature but he said he didnt have the original bill of sale. I've never bought a moped before and didnt think anything of it. I got pulled over on it and the police officer (luckily i knew him) told me that I could be in a lot of trouble for not having a bill of sale. If he hadn't known me that well I could have gone down for theft. Can I press charges on the guy I bought it from for not telling me that it had been stolen? And what should I do?