Judge rules warrantless use of Flock ALPR systems unconstitutional in Oklahoma
U.S. District Judge Sara E. Hill suppressed evidence in a federal drug case after finding that Tulsa County Deputy Sheriff Freddie Alaniz breached the Fourth Amendment by using Flock Safety and VehicleManager automated license‑plate readers to track a woman’s movements across several states without a warrant.
The ruling highlights a new legal boundary for law‑enforcement surveillance, emphasizing motorists’ reasonable expectation of privacy and signaling that mass vehicle‑location data may require judicial oversight before being used in investigations.
According to court documents, Alaniz accessed two ALPR databases, generating about 50 sightings of a Mazda SUV with a California plate. He entered the queries “traffic violation” and “investigation” and then used the historical data to monitor the vehicle’s travel across state lines, ultimately stopping the driver and discovering 91 pounds of methamphetamine.
Judge Hill wrote that the technology can reveal intimate details about a person’s life, from visits to a fertility clinic to trips to a liquor store, a casino, a doctor’s office or a lawyer’s office, and that the government cannot conduct such surveillance without an adequate basis.
It could track and log a couple struggling to start a family at the fertility clinic. It could show how often someone visits a liquor store or casino. It could show which doctor someone goes to or what lawyer’s office someone visits.
Privacy advocates note the case adds to at least 50 documented instances of officers misusing ALPR tools for non‑investigative purposes, prompting calls for stricter regulations. Senator Josh Hawley announced a “Stop Flock Abuse Act,” while Florida has already banned Flock cameras on state highways.
Flock Safety, which operates the cameras in 49 states, argues the system helps solve crimes, citing higher clearance rates in cities that use the technology. Company spokesperson Phil Arnold described the tools as a “force multiplier” for understaffed police departments.
The decision does not prohibit the use of ALPR cameras altogether, but it requires law‑enforcement agencies to obtain warrants or demonstrate probable cause before compiling historical vehicle location data, a threshold that may shape future surveillance practices across the country.
