Documented Incident

Wisconsin legal group sues Waukesha County and 11 municipalities over warrantless Flock searches

Event: September 10, 2026 · First reported: September 10, 2026 · 23 sources

The Wisconsin Institute for Law & Liberty, a conservative law firm, said it would file suit Sept. 10, 2026 in Waukesha County Circuit Court against Waukesha County and 11 municipalities over their use of Flock automated license plate readers. Filed on behalf of Citizens Defending Liberty, NoCams Muskego and Oconomowoc resident Donavan Haidinger, the complaint alleges warrantless searches of Flock's database violate Fourth Amendment protections and asks the court to require warrants. The suit cites over 120 cameras in Waukesha County and roughly 1,500 statewide, and leans on the U.S. Supreme Court's June 2026 decision in United States v. Chatrie. The named governments did not immediately respond to a Milwaukee Journal Sentinel request for comment.

Key facts

• Defendants include Waukesha County plus Muskego, Oconomowoc, New Berlin, Mukwonago, Waukesha, Delafield, Pewaukee, Elm Grove, Menomonee Falls, Brookfield and Hartland.
• Plaintiffs are Citizens Defending Liberty, NoCams Muskego and resident Donavan Haidinger; the suit was set to be filed Sept. 10, 2026.
• The complaint alleges more than 120 Flock cameras in Waukesha County and about 1,500 across Wisconsin.
• Attorney Dan Lennington said the requested rule would still permit warrantless use in emergencies such as kidnappings or active shooter incidents, or with owner consent.
• The claims are allegations that have not been tested in court; the ACLU has separately called for warrant requirements and civilian oversight.

Timeline

• September 10, 2026Wisconsin lawsuit seeks to require warrants for Flock camera searches
• September 10, 2026NOCAMS Muskego : Sues over warrantless Flock camera searches
• September 11, 2026WILL Sues 11 Waukesha County Communities Over Flock Cameras
• September 12, 2026Lawsuit challenges warrantless Flock database searches in county
• September 10, 2026Wisconsin Institute for Law & Liberty files suit over Flock cameras in Waukesha County
• September 10, 2026WILL Sues 11 Waukesha County Communities Over Flock Cameras
• October 7, 2026Lawsuit over Waukesha County Flock cameras moves to federal court
• October 8, 2026Flock Cameras Are Constitutional, Waukesha Communities Say, as They Haul WILL's Lawsuit Into Federal Court
• October 8, 2026Defense attorneys in Wisconsin Flock lawsuit seek dismissal
• October 8, 2026Waukesha County Citizens’ Group Called 'No Cams Muskego' Sues 12 Municipalities Over Flock Camera Warrants

Sources

This summary was written from the published reporting below and links to it; BlockFlockNow does not reproduce article text.

• Wisconsin lawsuit seeks to require warrants for Flock camera searches (Minnesota Lawyer, September 10, 2026)
• Lawsuit seeks to require warrants for Waukesha County Flock searches (Milwaukee Journal Sentinel, September 10, 2026)
• NOCAMS Muskego : Sues over warrantless Flock camera searches (wisbusiness.com, September 10, 2026)
• NoCams Muskego files lawsuit against 11 municipalities that use Flock (GMToday.com, September 11, 2026)
• NoCams Muskego files lawsuit against 11 municipalities that use Flock (gmtoday.com, September 11, 2026)
• WILL Sues 11 Waukesha County Communities Over Flock Cameras (urbanmilwaukee.com, September 11, 2026)
• Local group sues Waukesha County officials over Flock camera policy (Greater Milwaukee Today, September 10, 2026)
• Lawsuit challenges warrantless Flock database searches in county (Greater Milwaukee Today, September 12, 2026)
• Lawsuit challenges police use of Flock camera data in Waukesha County (WTMJ, September 10, 2026)
• Waukesha County Flock cameras; WILL files lawsuit (FOX6 News Milwaukee, September 10, 2026)
• WILL files suit over Flock cameras in Waukesha County (wisn.com, September 10, 2026)
• Wisconsin Institute for Law & Liberty files suit over Flock cameras in Waukesha County (WISN, September 10, 2026)
• WILL Sues 11 Waukesha County Communities Over Flock Cameras (Urban Milwaukee, September 10, 2026)
• Lawsuit over Waukesha County Flock cameras moves to federal court (FOX6 News Milwaukee, October 7, 2026)
• Waukesha County Flock camera lawsuit moves to federal court (Wisconsin Law Journal, October 8, 2026)
• Waukesha County law enforcement respond to lawsuit over license plate reader cameras, case moves to federal court (WTMJ, October 7, 2026)
• Lawsuit over Waukesha County Flock cameras moves to federal court (Newsbreak, October 8, 2026)
• Flock Safety Lawsuit Moves to Federal Court (Seehafer News, October 8, 2026)
• Flock Cameras Are Constitutional, Waukesha Communities Say, as They Haul WILL's Lawsuit Into Federal Court (Wisconsin Right Now, October 8, 2026)
• Flock Cameras Are Constitutional, Waukesha Communities Say, as They Haul WILL’s Lawsuit Into Federal Court (Newsbreak, October 8, 2026)
• Defense attorneys in Wisconsin Flock lawsuit seek dismissal (Minnesota Lawyer, October 8, 2026)
• Defense attorneys in Waukesha County Flock lawsuit seek dismissal (Milwaukee Journal Sentinel, October 7, 2026)
• Waukesha County Citizens’ Group Called 'No Cams Muskego' Sues 12 Municipalities Over Flock Camera Warrants (Gadget Review, October 8, 2026)

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About this record

BlockFlockNow documents reported incidents involving Flock Safety cameras and automated license plate readers: council votes, contract decisions, misuse by authorized users, lawsuits, audits, and community response. Every record is reviewed by a person before publication. New to the topic? Start with What is Flock?, find meetings near you, or learn how to request your town's camera records.

Updated October 11, 2026. Corrections: blockflock@bytebunny.io. See all documented incidents or search the full article archive.