(a) By Attorney for State. — The attorney for the state may move to dismiss a complaint, and if the magistrate grants the motion the prosecution shall thereupon terminate. Such a dismissal shall not be granted during the trial without the consent of the defendant.
(b) By Magistrate. — The magistrate may dismiss the complaint, with or without a motion, if there is unnecessary delay in bringing a defendant to trial or if the attorney for the state fails to appear at trial. If the magistrate grants a motion to dismiss a complaint based on a defect in the institution of the prosecution or in the complaint, the magistrate may also stay entry of the order for a specified time pending the filing of a new complaint.