Today, the Eleventh Circuit rejected the exceedingly common law enforcement practice of warrantlessly tracking suspects’ physical location using cell phone tower data. The opinion, United States v. Davis, is both welcome and overdue. Defendants who have and will be physically tracked without a warrant have new legal support to challenge that surveillance. Additionally, because the case involved stored cell site data, Davis undermines the government’s legal arguments that other warrantless “metadata” collection practices are constitutional.
Read the rest of my analysis over at Just Security blog.