My friend was just served to go to small claims court. The info that he has is from a lady that bought a bike from him. She took it to a bike shop that told her that the bike is not rideable (only after the shop charged her $500 for parts). They said it looks like it was hit by a car. I know that the bike has never been hit (we ride to work together and I would have heard about this). What type of proof can he get to show he has never been hit.