A:
Any two members (maker and seconder) may impeach (charge) an officer or other member with improper conduct by moving - in executive session - that he be charged with the offense and that the association determine what discipline, if any, should be imposed.
A committee sometimes is given the task of investigating the charges through interviews and hearings, then reports its findings to the assembly at a trial.
The assembly has the final decision on guilt and penalty.
This procedure is complex and is often colored with emotion.
I strongly suggest a thorough understanding of RONR Section 60.