Wis. Stat. § 26.97: Law enforcement and police power.

A state forest ranger, town chairperson, conservation warden or other duly appointed deputy may do any of the following:

(1) Arrest a person, with or without a warrant, when the person is detected actually committing a violation of this chapter, subch. VI of ch. 77, or s. 167.10 (3), 941.10 (1), 941.11, 941.12, 941.13, 943.02 (1), 943.03, 943.04, 943.05 or 943.06 (2).

(2) Arrest a person, with or without a warrant, whom the ranger, chairperson, warden or deputy has reason to believe is committing or has committed a violation of a statutory provision specified under sub. (1).

(3) Take the arrested person before the circuit court for the county where the violation occurred and make a proper complaint.

(4) Execute and serve any warrant or process in the same manner as any constable.