Federal Judge Rules Warrantless Flock ALPR Use Violates Fourth Amendment
A federal judge ruled warrantless use of Flock ALPR by a deputy unconstitutional under the Fourth Amendment.
Why it matters: This decision restricts law enforcement's ability to use ALPR technology without warrants, raising important privacy and compliance concerns for legal teams managing surveillance data.
- On October 1, 2026, U.S. District Judge Sara E. Hill ruled that a Tulsa County deputy’s warrantless use of Flock ALPR violated the Fourth Amendment.
- The deputy tracked Melisa Kyle’s vehicle over 50 times in about a month, leading to seizure of 91 pounds of methamphetamine.
- Judge Hill characterized warrantless ALPR use as ‘indiscriminate mass surveillance’ and suppressed all evidence from the search.
- Flock Safety disputes the ruling, citing conflicting decisions nationwide and plans to appeal.
On October 1, 2026, U.S. District Judge Sara E. Hill found that a Tulsa County sheriff’s deputy violated the Fourth Amendment by using Flock Safety's automated license plate reader (ALPR) to track Melisa Kyle’s vehicle without obtaining a warrant.
The deputy accessed more than 50 records of Kyle’s vehicle movements over roughly one month. This data led to her arrest and the seizure of approximately 91 pounds of methamphetamine. However, Judge Hill determined that this warrantless tracking constituted 'indiscriminate mass surveillance' and suppressed all evidence gathered through the search.
Judge Hill emphasized, "Freedom from persistent, dragnet-style surveillance in public is a reasonable societal expectation," highlighting constitutional protections against persistent vehicle tracking.
This ruling contrasts with a February 2026 decision by a federal judge in Norfolk, Virginia, which upheld warrantless use of 176 Flock ALPR cameras but acknowledged that evolving technology and legal standards could affect future interpretations.
Flock Safety spokesperson Paris Lewbel responded, stating, "The ruling conflicts with numerous decisions across the country, including other cases in Oklahoma. We anticipate appealing this decision." Lewbel’s remarks reflect ongoing debate around ALPR legality.
The case underscores increasing legal scrutiny over law enforcement’s use of surveillance technologies like ALPRs and the need for legal teams to monitor evolving privacy and compliance landscapes. The ruling may influence policy on data collection limits and warrant requirements nationwide.
Legal experts note that this decision could shift how courts balance surveillance technology deployment and constitutional privacy rights. Official court documents and statements support these evolving interpretations.
By the numbers:
- 50+ vehicle tracking records — accessed without warrant over one month
- 91 pounds — methamphetamine seized following warrantless ALPR search
- February 2026 — prior federal ruling in Norfolk allowing warrantless ALPR use
Yes, but: While the ruling limits warrantless ALPR use in this case, other courts have upheld such practices, signaling ongoing legal uncertainty.
What's next: Flock Safety has announced plans to appeal the decision. Future rulings will likely further define warrant requirements for ALPR use.