Originally Posted by
veganbikes
I would get the bike to the original owner and I would talk with the person who sold the stolen bike to you and see if you can get your money back. If they decide to not give you your money back then I would involve the police.
No! This could be considered extortion--generally threatening to report a crime unless you are paid is itself criminal (blackmail). You don't want to do anything that could be construed as that it's not worth the risk.