Can Police Search License Plate Reader Data Without a Warrant?

Our Take

Attorney Jed Silverman is asking the question that should keep every American up at night: can cops paw through your movements captured by license plate readers without ever getting a warrant? Spoiler, in most jurisdictions, yes. Courts have been slow to extend Fourth Amendment protections to this kind of data, treating your car's location history as fair game because you're technically driving in "public." That legal fiction ignores the reality that networks like Flock Safety stitch together thousands of cameras into a rolling, searchable map of where you've been, when, and how often.

What makes this worse is scale. A single traffic stop doesn't reveal a pattern, but a database of plate scans going back weeks or months absolutely does. Police departments can query this data on a hunch, no judge required, no probable cause needed. Silverman's breakdown is a useful primer for anyone who assumed "the police need a warrant for that" is still a reliable rule in 2024. It isn't, and that gap is exactly what's letting ALPR networks metastasize with almost zero judicial oversight.

This is why documenting the hardware matters as much as fighting the legal battles. If you don't know a camera exists, you can't challenge how its data gets used. Check our camera map to see what's watching your commute, and hit up take action if you want to push back on warrantless access in your city.