United States v. Brignoni-Ponce (1975)
Border Patrol agents stopped a car near the U.S.-Mexico border "solely because" the occupants appeared to be of Mexican ancestry. The Supreme Court ruled that apparent Mexican ancestry alone is not reasonable suspicion to justify a stop.
The stop was ruled unlawful, and courts applied the "reasonable suspicion" standard to immigration enforcement.
Established that demographic appearance cannot justify immigration stops without additional facts.
The same logic underpins Venegas's challenge to ICE preemptive detention of workers based on a generalized Latino demographic profile.
