Rule 614.Calling and Interrogation of Witnesses by
(a) Calling by Court. The court may, on its own motion or
at the suggestion of a party, call witnesses, and all parties are
entitled to cross-examine witnesses thus called.
(b) Interrogation by Court. The court may interrogate
witnesses, whether called by itself or by a party.
(c) Objections. Objections to the calling of witnesses by the
court or to interrogation by it may be made at the time or at
the next available opportunity when the jury is not present.