If the panel is insufficient to provide and maintain a grand jury of seven members, the panel shall be refilled from the jury box or computer selection process by the clerk of the court under direction of the court; additional grand jurors shall be selected until a grand jury of seven grand jurors is secured, and they shall be summoned in the manner as those originally drawn.
The foreman or forewoman of the grand jury may administer the oath to all witnesses produced and examined before it.
Any clerk, assistant clerk, bailiff, or court attendant appointed by the court must be given the following oath: “Do you solemnly swear that you will faithfully and impartially perform the duties of your office, that you will not reveal to anyone its proceedings or the testimony given before it and will abstain from expressing any opinion upon any question before it, to or in the presence or hearing of the grand jury or any member thereof?”
The grand jury is entitled to free access at all reasonable times to county institutions and places of confinement, and to the examination without charge of all public records within the county.
It is made the special duty of the grand jury to inquire into:
Iowa. R. Crim. P. 2.3