San Jose’s sprawling network of 474 surveillance cameras capturing 360 million images annually now faces a federal lawsuit challenging the government’s ability to track every driver’s movements without warrants, probable cause, or suspicion.
Story Snapshot
- Three San Jose residents filed a class-action lawsuit claiming the city’s automatic license plate reader system violates Fourth Amendment protections against warrantless searches
- The network of 474 cameras generated 2.5 million database searches in late 2025 alone, accessible to over 1,000 city employees and nearly 300 California agencies
- Plaintiffs demand data deletion after 24 hours unless police obtain warrants, arguing the system creates searchable movement histories of innocent citizens
- Past cases nationwide show officers have abused similar systems for stalking and unauthorized tracking, raising concerns about government overreach
Mass Surveillance Without Individual Suspicion
The Institute for Justice filed the federal class-action lawsuit on April 15, 2026, on behalf of Tony Tan, Scott West, and Colin Wolfson in the U.S. District Court for the Northern District of California. The complaint challenges San Jose’s Flock Safety automatic license plate reader cameras deployed across 178 square miles, averaging 2.7 cameras per square mile. These devices use artificial intelligence to log not just license plates but vehicle make, model, color, and even details like bumper stickers. The system stores all data for 30 days and enables retrospective searches of any vehicle’s movements throughout the city.
Staggering Search Volume Raises Red Flags
The scope of surveillance has exploded in recent years. San Jose’s ALPR network recorded 360 million images in 2024 alone. More alarming to privacy advocates, police conducted approximately 15,000 searches daily during late 2025, totaling 2.5 million queries in just months. Over 1,000 San Jose Police Department employees can access this database, along with personnel from nearly 300 other California law enforcement agencies. This represents a fundamental shift from traditional policing, where officers observed specific suspicious behavior before investigating. Instead, the system catalogues everyone’s movements first, then searches retrospectively without any individualized suspicion or judicial oversight.
Constitutional Precedents Demand Warrant Protection
The lawsuit cites three key Supreme Court decisions establishing that warrantless location tracking violates the Fourth Amendment. In Katz v. United States, the Court recognized citizens have reasonable privacy expectations even in public. United States v. Jones required warrants for GPS tracking devices attached to vehicles. Most critically, Carpenter v. United States mandated warrants for accessing cell phone location records, establishing that prolonged tracking of movements constitutes a search under the Constitution. Institute for Justice attorney Michael Soyfer argues San Jose’s system goes further than any of these precedents, creating comprehensive movement histories for every driver that officials can search at will without judicial review.
City Defends Practices Amid Abuse Concerns
San Jose City Attorney Susana Alcala Wood maintains the cameras operate lawfully because they capture images only in public view and the department has policies prohibiting misuse. According to the city, guidelines prevent using ALPR data for First Amendment-protected activities, immigration enforcement, or automated citations without human review. However, the lawsuit documents that nationwide officers have exploited similar systems for stalking, personal vendettas, and unauthorized tracking unrelated to legitimate investigations. One Texas case involved tracking vehicles visiting abortion clinics. The plaintiffs argue that regardless of written policies, the system’s architecture enables abuse and fundamentally transforms government’s relationship with citizens by presuming everyone guilty enough to track constantly.
Broader Implications for Privacy and Governance
This case represents a flashpoint in the ongoing tension between public safety technology and constitutional protections. If successful, the lawsuit could establish nationwide precedent requiring law enforcement to obtain warrants before accessing ALPR data, limiting retention periods to 24 hours for non-suspect vehicles. Such a ruling would impact Flock Safety and similar vendors whose business models depend on aggregating massive databases accessible to multiple agencies. Beyond San Jose, the case reflects growing bipartisan frustration with government surveillance overreach. Both conservatives concerned about tyrannical government power and liberals worried about discriminatory enforcement find common ground opposing warrantless tracking of law-abiding citizens. The plaintiffs notably seek only one dollar in nominal damages, focusing instead on forcing systemic change through mandatory data deletion and warrant requirements.
San Jose's 'Creepy' and 'Deeply Intrusive' ALPR Camera System Is Unconstitutional, a New Lawsuit Says https://t.co/eUXAFr8POI via @reason
— Margaret (@teragramus) April 17, 2026
A parallel lawsuit filed in November 2025 by SIREN and other advocacy groups challenges similar practices, indicating mounting legal pressure on San Jose’s surveillance apparatus. The city now faces defending its practices in federal court while the nation watches to see whether Fourth Amendment protections will extend to this new era of mass automated surveillance. For millions of San Jose residents whose vehicles have been photographed and catalogued without their knowledge or consent, the case raises fundamental questions about whether citizens can move freely without creating permanent government records of their activities, associations, and daily routines.
Sources:
San Jose License Plate Readers Face Federal Class Action Lawsuit Over Warrantless Tracking
Three San Jose Residents File Federal Class-Action Lawsuit Over City’s Mass Surveillance of Drivers
