State v. Rodney G. Zivcic, 229 Wis.2d 119, 598 N.W.2d 565 (Ct. App. 1999)
For Zivcic: John J. Carter
Issue/Holding: A sheriff’s deputy has authority to arrest in a city located in the county.
Easy enough. Plus, there’s significant authority allowing a an officer to peform an out-of-jurisdiction arrest under a “citizen’s arrest” rationale: see State v. James W. Keith, 2003 WI App 47 (discussion of point, albeit without reaching it under facts).