Key points
- Electronic Frontier Foundation and ACLU of Wisconsin filed a petition with the state supreme court regarding automated license plate reader searches.
- The legal challenge affects retrospective data queries in Milwaukee, Racine, Kenosha and Green Bay under the state constitution.
- Plaintiffs include the Wisconsin Council of Churches and a Green Bay pastor, citing privacy rights for sensitive activities.
The short version
- Drivers in four Wisconsin cities are subject to retrospective searches of automated license plate reader databases without warrants.
- Civil liberties groups argue this practice violates the state constitution and demands judicial intervention to stop mass surveillance.
- The case represents a second legal challenge by these organisations against warrantless plate tracking, following a previous suit in San Jose.
The details
The Electronic Frontier Foundation joined the ACLU of Wisconsin in filing a petition to the Wisconsin Supreme Court, according to a report by the Electronic Frontier Foundation. The legal teams are asking the high court to rule that the state constitution requires law enforcement to obtain a warrant before conducting retrospective searches of automated license plate reader databases. This request specifically targets data usage in four cities: Milwaukee, Racine, Kenosha and Green Bay. The petition represents the Wisconsin Council of Churches and an individual pastor based in Green Bay. These clients argue that their work involves expressive associations, including religious worship and confidential counselling, which heighten the need for location privacy. The Electronic Frontier Foundation states that drivers are recorded while seeking medical care, attending recovery meetings, participating in protests and engaging in other private activities.
Law enforcement entities across Wisconsin collect, store and aggregate this data, then search it to track movements retrospectively. The legal groups contend this capability allows tracking that would have been prohibitively costly or impossible before automated license plate reader technology. They argue that surveillance vendors should not help police upend the system of individualized suspicion. The petition highlights that visitors to houses of worship have a strong right to privacy against monitoring of when they pray or attend domestic violence survivor meetings. The Electronic Frontier Foundation notes this is their second lawsuit challenging warrantless searches, following a case in San Jose. Earlier this month, a federal court in Oklahoma became the first to rule that automated license plate readers constitute indiscriminate mass surveillance and suppressed evidence from a warrantless search. The legal teams hope the Wisconsin Supreme Court will agree with this assessment.
The context
Automated license plate readers record the movements of vast numbers of drivers as they engage in sensitive activities, according to the Electronic Frontier Foundation. Law enforcement agencies collect and share this data, enabling retrospective tracking of individuals and communities. The technology allows for surveillance that was previously impossible due to cost and logistical barriers. The legal challenge asserts that all citizens deserve freedom from warrantless mass surveillance.
The organisations argue that the current system allows police to bypass individualized suspicion requirements. The petition draws parallels to other sensitive locations where privacy is expected, such as medical facilities and political meeting venues. The recent Oklahoma ruling provides a precedent for viewing automated license plate readers as a form of indiscriminate mass surveillance. This Wisconsin case tests whether the state constitution offers similar protections against warrantless searches of this aggregated data.
Defender's checklist
- Monitor legal developments regarding automated license plate reader regulations in your jurisdiction.
- Review local law enforcement policies on data retention and sharing for surveillance technologies.
- Understand the constitutional arguments being used to challenge warrantless searches in your state.
- Track court rulings on mass surveillance tools that affect driver privacy and location data.
If your data is involved
Teams usually advise affected individuals to review their legal rights regarding location privacy and surveillance. Check whether your state has specific laws governing automated license plate reader data retention and access. Recognise that follow-up scams often exploit anxiety about data exposure by sending fake legal notices or phishing emails. Do not click links in unsolicited messages claiming to offer legal protection or data removal services. Verify any official communication through independent channels before providing personal information. Maintain awareness of how your movements are being recorded and shared by law enforcement agencies.
Background: Phishing
Phishing is a broad, automated attack sent to thousands of recipients using generic templates. Spear phishing targets specific individuals or organisations using researched personal details. The core difference lies in the level of personalisation. You defend against phishing with technical filters and against spear phishing with verification protocols and human awareness.
Read the full guide: Phishing vs Spear Phishing: Targeting Mechanics and Defence
What to do and how to stay safe: Electronic Frontier Foundation
- Review your state's laws on automated license plate reader data retention and access rights.
- Monitor official court filings for updates on the Wisconsin Supreme Court petition.
- Verify any unsolicited communications about legal actions or data breaches through independent channels.
- Consult legal resources if you believe your privacy rights have been violated by warrantless surveillance.
Step-by-step guide: What is online tracking: how data follows you and how to stop it
General security guidance from the Cipher Insider newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
Which cities are affected by this legal challenge?
The petition targets retrospective searches of automated license plate reader databases in Milwaukee, Racine, Kenosha and Green Bay.
Who filed the petition with the Wisconsin Supreme Court?
The Electronic Frontier Foundation and the ACLU of Wisconsin filed the petition on behalf of the Wisconsin Council of Churches and a Green Bay pastor.
What is the main argument of the legal challenge?
The groups argue that the state constitution requires a warrant for retrospective searches of automated license plate reader data to prevent warrantless mass surveillance.
