Rule 8.3 - Reporting Professional Misconduct(a) A lawyer who knows that another lawyer has committed a violation of the Rules of Professional Conduct that raises a substantial question as to that lawyer's honesty, trustworthiness or fitness as a lawyer in other respects, shall inform the appropriate professional authority, except as otherwise provided in these Rules or by law.(b) A lawyer who knows that a judge has committed a violation of applicable rules of judicial conduct that raises a substantial question as to the judge's fitness for office shall inform the appropriate authority.(c) This Rule does not require disclosure of information otherwise protected by ER 1.6 or information gained by a lawyer or judge while serving as a member of an approved lawyers assistance program to the extent that such information would be confidential if it related to the representation of a client.Ariz. R. Prof'l. Cond. 8.3