Overview
- A four-justice majority accepted the case as an original action, with conservative Justices Annette Ziegler and Rebecca Bradley dissenting and Justice Brian Hagedorn writing separately about process.
- The court ordered expedited briefing within two months and will set oral arguments for early next year, creating a path to a faster final ruling potentially by mid-2026.
- Filed by the ACLU on behalf of Voces de la Frontera, the petition targets sheriffs in Walworth, Brown, Kenosha, Marathon and Sauk counties for honoring ICE detainers.
- Plaintiffs argue that holding someone past release without a judicial warrant is an illegal new arrest under Wisconsin law, while sheriffs maintain their cooperation fits state authority and the federal framework.
- The filing cites more than 700 ICE detainer requests in the first seven months of 2025 and at least 247 people allegedly held unlawfully, as national immigration enforcement has intensified under President Donald Trump.