Witnesses are subject to cross-examination. Yes, appeals are addressed to the Vice President for Student Affairs. The appeal is limited to a review of the record of the hearing to determine if the decision is in violation of University policy or is unreasonable. If suspended, notation of that Suspension will appear on the transcript while the student is suspended. An expulsion appears on the transcript indefinitely.
Records are confidential.
Only individuals with a legitimate academic interest in the matter will be informed. Those individuals often include the Registrar, the complaining faculty member, some schools, and the Graduate School. The specifics of record keeping should be discussed with the Dean. More details can be found in the UNC Student Handbook under Disciplinary Action and Procedures through the Dean of Students Office homage or a printed copy can be obtained at the Dean of Students Office, Carter Hall 3005.