tl;dr: A crime analyst and expert witness argues that historical searches of automated license plate reader (ALPR) data should require a warrant, since dense camera networks now enable tracking comparable to the cell-site data protected under Carpenter v. US. He contends that short data-retention policies (like New Hampshire's 3 minutes) don't actually prevent abuse—stalkers just re-query every cycle—while hampering legitimate long-term investigations. Instead, states should mandate warrants for historical searches, allow reasonable retention, and delegate audits and enforcement (including firing and banning abusers) to a third party rather than the police departments themselves.