Just because the police didn't charge anyone doesn't mean no crime was committed. I'm not the one making assumptions, we don't know what happened, nor likely do the police, which means they CAN'T act. The university and the police don't have to have the same burden of proof standards nor should they. The school doesn't have to have proof beyond a reasonable doubt to flunk a kid for cheating on a test or to ban a guy from the women's dorms if he's suspected of stalking. I'm not assuming anything happened and legally the police cannot either but the University can. Going to school there and partaking in their activities isn't a constitutional right, it's a privilege that can be revoked upon their discretion. If they think there is reasonable enough suspicion of improper conduct they have a right to act in the best interest of the community, the other students and their brand. The university has bungled this and just about everything else, but they do not have to act with the same standards as law enforcement.