Rule 607 - Who may impeach; party not bound by testimony(a) The credibility of a witness may be attacked by any party, including the party calling the witness.(b) No party is bound by the testimony of any witness.Ad. Sup. Ct. Ord. 12729, Dec. 29, 1976, eff. July 1, 1977; amd. Sup. Ct. Ord. June 7, 1990, eff. June 7, 1990.