The Electronic Frontier Foundation and the ACLU of Wisconsin have filed a petition with the Wisconsin Supreme Court asking the court to require a warrant for retrospective searches of Automated License Plate Reader (ALPR) databases. The petition argues that the state constitution mandates a warrant for such searches, which currently allow law‑enforcement agencies in Milwaukee, Racine, Kenosha and Green Bay to track individuals' movements without individualized suspicion. The filing follows a recent federal ruling in Oklahoma that classified ALPR searches as indiscriminate mass surveillance.
Why it matters: The case could reshape privacy protections for location data by imposing warrant requirements on mass ALPR surveillance.
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