Iowa Code § 226.9: Custody of patient.

The superintendent, upon the receipt of a duly executed order of admission of a patient into a state mental health institute, pursuant to section 229.13, shall take the patient into custody and restrain the patient as provided by law and the rules of the department, without liability on the part of such superintendent and all other officers of the mental health institute to prosecution of any kind, but no person shall be detained in the mental health institute who is found by the superintendent to be in good mental health.