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Massachusetts State Police must disclose license plate reader locations, judge rules

Massachusetts State Police must disclose license plate reader locations, judge rules

Rule Changes Boston, MA local

Suffolk Superior Court ruling ends ACLU's five-year fight over surveillance camera transparency

4 days ago: Ruling publicized; State Police weighs appeal

Overview

Updated Yesterday

Massachusetts State Police must tell the public where its automatic license plate reader cameras sit and when troopers search the database. A Suffolk Superior Court judge ruled that the agency cannot hide those records behind public safety exemptions.

The decision caps a five-year fight by the ACLU of Massachusetts and lands as at least 25 towns cancel or suspend contracts with Flock Safety, the surveillance vendor at the center of a national backlash. Four officers face investigation for using ALPR databases to track victims and former partners.

Why it matters

If it survives appeal, Massachusetts residents will finally learn where state police track their vehicles, and other states get a transparency template.

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Key Indicators

80–100
ALPR cameras maintained by Massachusetts State Police
Statewide network using Vigilant Solutions technology, per court filings.
25
Massachusetts municipalities that cancelled or paused Flock contracts
Over the past 18 months, according to the ACLU.
5+
Years of ACLU litigation over ALPR records
Records request filed after 2020 SJC ruling; lawsuit filed November 2023.
4
Officers facing investigation for ALPR misuse
Agencies in Revere, Lynn, New Bedford, and Stow.

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People Involved

Organizations Involved

Timeline

2008 September 2026

7 events Latest: 4 days ago
Tap a bar to jump to that date
  1. ACLU files public records request

    Public records

    After the SJC ruling, ACLU requests ALPR camera locations and audit logs from State Police.

  2. ALPR technology deployed in Massachusetts

    Deployment

    Automatic license plate reader cameras enter use across the state's roadways.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

June 2011 – 2015

Stingray cell-site simulator secrecy (2011–2015)

Police departments across the U.S. used Stingray devices, which impersonate cell towers to capture phone locations and data. The FBI required agencies to sign nondisclosure agreements, keeping the technology secret even from judges and the public. ACLU affiliates filed records requests and lawsuits to uncover basic facts about the devices.

Then

Records disclosures forced several departments to release policies and admit Stingray use. Some states passed laws requiring warrants.

Now

Stingray secrecy became a template for the broader fight over police surveillance transparency, prompting courts and legislatures to demand disclosure of automated tracking tools.

Why this matters now

Like ALPR cameras today, Stingrays were a police surveillance technology whose basic parameters were hidden from the public until litigation forced disclosure.

June 2018

Carpenter v. United States (2018)

The Supreme Court ruled 5-4 that the government needs a warrant to access months of cell-site location records from a wireless carrier. Chief Justice John Roberts wrote that such records give police an all-encompassing view of a person's movements.

Then

Police must obtain a warrant for cell-site location records, a major privacy win.

Now

Courts have extended the reasoning to other location-tracking technologies, including GPS and some camera networks.

Why this matters now

The 2020 Massachusetts SJC ruling the ACLU relies on drew on Carpenter's logic about accumulated location data.

Sources

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