Wis. Stat. § 323.16: Powers of law enforcement officers.

During any state of emergency declared by the governor or during any training program or exercises authorized by the adjutant general, any law enforcement officer, when legally engaged in traffic control, escort duty, or protective service, may carry out the functions anywhere in the state but shall be subject to the direction of the adjutant general through the sheriff of the county in which an assigned function is performed.