I told Dave about your dilemma and he said to tell you this:
Call one of the elders who visited you, ask who is the chairman of your committee, and call him. Ask him what are the accusations against you, who are the witnesses, and will they be there. They HAVE to tell you that information. It is your right, and they can't get away with telling you it is confidential. Also, you are entitled to bring witnesses to refute the accusation.
Do it! 