Wis. Stat. § 946.70: Impersonating peace officers, fire fighters, or other emergency personnel.

(1) Except as provided in sub. (2), whoever does any of the following is guilty of a Class I felony:

(a) Impersonates a peace officer with intent to mislead others into believing that the person is actually a peace officer.

(b) Impersonates a fire fighter with intent to mislead others into believing that the person is actually a fire fighter.

(c) Impersonates an emergency medical services practitioner, as defined in s. 256.01 (5), with intent to mislead others into believing that the person is actually an emergency medical services practitioner.

(d) Impersonates an emergency medical responder, as defined in s. 256.01 (4p), with intent to mislead others into believing that the person is actually an emergency medical responder.

(2) Any person violating sub. (1) with the intent to commit or aid or abet the commission of a crime other than a crime under this section is guilty of a Class H felony.