Iowa Code § 99.24: Duty of county attorney.

In case the existence of such nuisance is established in a criminal proceeding in a court not having equitable jurisdiction, it shall be the duty of the county attorney to proceed promptly under this chapter to enforce the provisions and penalties thereof; and the finding of the defendant guilty in such criminal proceedings, unless reversed or set aside, shall be conclusive as against such defendant as to the existence of the nuisance.