The presiding officer's duty is to be fair and impartial. In the situation you describe, I don't see how the president can be impartial, so she should step aside and let someone else chair that part of the meeting. If the charges are serious enough, Robert's Rules prescribes that you form a committee to investigate the misconduct. You do this by making a motion at a general meeting. If the motion passes, the committee investigates by talking to people involved, including the president, and looking at any pertinent evidence.
- Craig
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