Yes, you can be arrested for auto theft unless there was an agreement that you would keep the car until the money was returned (which you should have gotten in writing.) And, since the car is in the roommate's name, I can envision the roommate saying she wants her car back & you would definitely have to return it if she says it is hers because you have no agreement with her.
Answered on Oct 12th, 2011 at 5:25 PM