A newly unsealed court filing in a high-stakes federal lawsuit has peeled back the curtain on the surveillance apparatus used by the U.S. Department of Homeland Security (DHS), revealing a disturbing pattern of alleged intimidation against citizens observing immigration enforcement. The documents suggest that federal agents have been creating dossiers on individuals exercising their First Amendment rights, utilizing sophisticated data-mining software to track, document, and potentially penalize those who monitor the activities of U.S. Immigration and Customs Enforcement (ICE).
The class-action lawsuit, filed in the U.S. District Court for the District of Maine, centers on the experiences of four plaintiffs—Elinor Hilton, Colleen Fagan, Polyxenia Pantos, and Carlyn Williams—who claim they were targeted for their role in observing ICE enforcement actions during a January operation in Maine known as "Operation Catch of the Day."
The Scope of the Surveillance Apparatus
At the heart of the controversy is the Investigative Case Management (ICM) database, a system developed by the data analytics firm Palantir. The plaintiffs allege that DHS agents used the ICM—a platform ostensibly designed for tracking legitimate criminal investigations—to aggregate sensitive personal data on civilian observers.
According to the legal filing, which draws heavily from government-produced documents and sworn depositions, the dossiers created in the ICM contained more than just names. They included high-resolution photographs, license plate numbers, home addresses, phone numbers, and information regarding the plaintiffs’ cohabitants.
The integration of this data is particularly concerning to civil liberties advocates due to the system’s interconnected nature. The ICM is not a siloed database; it is programmed to share records automatically with the Customs and Border Protection (CBP) TECS system. This means that when an agent tags an observer in the ICM, that individual may inadvertently trigger "lookout" alerts that lead to secondary inspections at border crossings, a practice that, according to the filings, could impact the plaintiffs through January 2027.
Chronology of an Escalating Conflict
The friction between ICE agents and the observers reached a breaking point during the January 2026 enforcement surge in Portland, Maine. The following timeline outlines the events as described in the legal filings:
- January 20, 2026: Polyxenia Pantos, while observing an arrest in Portland, stood a few car lengths away and captured photographs of the encounter.
- Post-Arrest Surveillance: Hours later, a DHS agent identified in the court filings only as "Agent J.C." initiated a search of the vehicle used by Pantos. Using the license plate, the agent pulled a report from "Accurint," a LexisNexis database often used by law enforcement to access public records and private contact information.
- The Identification Effort: J.C. circulated a photo of the vehicle’s owner, Carlyn Williams, to his team, asking for verification of her identity. When a colleague noted that the photo did not match the person they had interacted with at the scene, J.C. reportedly responded by stating he was "adding them in ICM now."
- Intimidation Tactics: That same afternoon, Williams received a telephone call from J.C., who identified himself only as "the Department of Homeland Security." According to Williams’ testimony, the agent warned her to discourage her spouse, Pantos, from future observation work, suggesting that such activities could lead to being added to a "domestic terrorism watchlist."
- Official Deposition: During a later deposition, J.C. admitted to calling Williams and warning her of potential arrest if she continued her activities, though he denied specifically referencing a "domestic terrorism watchlist."
Supporting Data and Technical Infrastructure
The technical backbone of this surveillance is Palantir’s "Gotham" software, which powers the ICM. Since 2014, ICE has contracted with Palantir to maintain and customize this system. The scale of the investment is significant: in 2022, ICE awarded the company a five-year support contract valued at nearly $96 million.
The expansion of this digital net has continued under the current administration. In 2025, the government added approximately $30 million to the contract to develop "ImmigrationOS," a new, more integrated platform.
The government’s own records provide a grim confirmation of how these tools are applied to non-criminal actors. One ICM record regarding Williams explicitly notes that she was the registered owner of a vehicle used to "interrupt ICE arrests." Another record, labeling two individuals as a "Threat to Law Enforcement" and "Professional Protestor," shows that agents used a mobile application called "Mobile Query" to conduct facial recognition searches against images captured in a parking lot.
Official Responses and The Government’s Position
The Department of Homeland Security has maintained a firm stance against the allegations, labeling the lawsuit as "meritless." A DHS spokesperson stated, "The underlying lawsuit is based on the lie that there is a database of ‘domestic terrorists’ run by DHS."
In a motion to dismiss, government attorneys argue that the events described in the filing were isolated, anomalous incidents that do not reflect standard department policy. They assert that Agent J.C. acted on his own initiative, believing the individuals to be potential threats, and that he did not actually attempt to nominate them to a formal terrorist watchlist.
Furthermore, Todd Lyons, the former acting director of ICE, attempted to distance the agency from the accusations in an April letter to Rep. Maxwell Frost. Lyons insisted that ICE "does not maintain any kind of database of U.S. citizens protesting ICE activities" and clarified that the agency does not keep separate, standalone databases for individuals who have not been arrested or detained.
The Chilling Effect on Civil Rights
The plaintiffs, represented by the non-profit advocacy group Protect Democracy, argue that the government’s actions have created a profound "chilling effect" on the exercise of First Amendment rights. The legal filing notes that the intimidation worked: following the phone call from Agent J.C., Pantos ceased all observation activities, and Williams, despite a brief period of continued involvement, eventually stopped altogether out of fear of government retaliation.
"The government is treating people who exercise their First Amendment rights and seek to hold it accountable as criminal suspects, and that’s what we’re asking the court to stop," says JoAnna Suriani, an attorney at Protect Democracy.
Implications for Privacy and Accountability
The implications of this case extend far beyond the four plaintiffs in Maine. At its core, the lawsuit challenges the unchecked expansion of law enforcement surveillance in the digital age. When powerful software like Palantir’s Gotham is used to catalog the activities of protesters, the line between legitimate public safety operations and the political surveillance of dissent begins to blur.
The plaintiffs are seeking specific judicial intervention, including:
- Archiving: A court order to archive the records created on Williams and the other plaintiffs to prevent their future use.
- Injunctions: A prohibition against DHS using any information collected during the surveillance against the plaintiffs.
- Policy Reform: An order preventing agents from using the threat of watchlists or physical intimidation—such as monitoring homes or tracking vehicles—against civilian observers.
As the court deliberates on the motion to dismiss, the case serves as a stark reminder of the tension between national security operations and the constitutional rights of the citizenry. Whether the courts view these actions as a "rogue" breach of policy or a systemic issue inherent in the agency’s data-gathering architecture remains to be seen. However, the exposure of these documents ensures that the debate over the intersection of immigration enforcement, private data contracting, and the First Amendment will remain a central fixture in the national conversation on privacy for the foreseeable future.
