Wis. Stat. § 59.28
Suppression of evidence is not required when a law enforcement officer obtains evidence outside of his or her jurisdiction. Any jurisdictional transgression violates the appropriate jurisdiction's authority not the defendant's rights. State v. Mieritz, 193 Wis. 2d 571, 534 N.W.2d 632 (Ct. App. 1995). A state traffic patrol officer should not, except in extreme emergencies, be impressed into service as part of a posse comitatus under sub. (1). If so impressed, the officer is entitled to worker's compensation, if injured, from the county or municipality but would not be entitled to regular pay from the state and probably would not be entitled to worker's compensation from the state. 62 Atty. Gen. 38. The statutes do not permit the creation of a separate regional law enforcement agency, and neither the sheriff nor the county board has power to delegate supervisory or law enforcement powers to such an agency. 63 Atty. Gen. 596. A sheriff may not unilaterally withdraw investigative services provided to one urbanized town within the county because the town maintains its own police department. 81 Atty. Gen. 24.