218.31  Witnesses.
  In aid of any investigation the administrator shall have the power to summon and compel the attendance of witnesses; to examine the same under oath, which the administrator shall have power to administer; to have access to all books, papers, and property material to such investigation, and to order the production of any other books or papers material thereto. Witnesses other than those in the employ of the state shall be entitled to the same fees as in civil cases in the district court.
[S13, §2727-a10; C24, 27, 31, 35, 39, §3314; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §218.31]

Witness fees, §622.69 – 622.75