In Massachusetts, if that helps.

I was talking to my friend who goes to a mostly male school, where he met his now, ex-girlfriend. Apparently, her psycho ass friends are accusing him of sexually abusing her. His ex told him that she's told the school it didn't happen (he's not sure if he believes that)

He's now been kicked off campus, and cant return until the situation is figured out, or he'll be arrested for trespassing. What kind of rights does he have?