Wis. Stat. § 822.45: Role of prosecutor.

(1) A prosecutor, in a case arising under this chapter or involving the Hague Convention on the Civil Aspects of International Child Abduction, may take any lawful action, including resort to a proceeding under this subchapter or any other available civil proceeding to locate a child, obtain the return of a child, or enforce a child custody determination if any of the following exists:

(a) A child custody determination.

(b) A request to do so from a court in a pending child custody proceeding.

(c) A reasonable belief that a criminal statute has been violated.

(d) A reasonable belief that the child has been wrongfully removed or retained in violation of the Hague Convention on the Civil Aspects of International Child Abduction.

(2) A prosecutor acting under this section acts on behalf of the court and may not represent any party.