DHS Is Using Civil Discovery to Get Maine's ICE-Watch Signal Chats. Plaintiffs Say That's Unconstitutional.

In Hilton v. Noem, a federal civil rights lawsuit filed in Maine, the government is using civil discovery, the same evidence-exchange tool that runs through every ordinary federal lawsuit, to obtain Signal group chats that Maine residents used to coordinate ICE-watching in their neighborhoods. The mechanism is a civil discovery request in a civil case; it is not a criminal subpoena, a search warrant, or a surveillance program. Plaintiffs' counsel argue the request itself violates the First Amendment, and they are responding with a concrete defensive playbook that is now part of the case record.

The discovery requests, described in a declaration from Genevieve Nadeau, special counsel and program lead for Protect Democracy's Civil Society Defense and one of the attorneys representing the protesters, ask for a list of protests each named defendant attended, communications reflecting plaintiffs' beliefs or opinions about law enforcement personnel, and communications about opportunities to observe or record ICE activity in Maine from January 20, 2025 to the present. The category that worries community organizers is the third: it sweeps in the kind of neighborhood "rapid response" Signal chats that sprang up after immigration enforcement activity ramped up in Maine, where a single alert from one observer can move a group of neighbors into a street within minutes.

The case grew out of allegations that DHS agents surveilled the plaintiffs' protest and observation activity. According to the complaint, agents scanned one plaintiff's face and collected her license plate information while she was observing ICE activity, and told her they were going to put her in a "nice little database." That statement is a plaintiff allegation about what DHS agents said; DHS has not been quoted in available material confirming or denying it. The broader claim, that DHS surveilled protest and observation activity, including face scans and license-plate collection during ICE operations, is also a plaintiff characterization drawn from the filings, not an established fact in the public record.

In June, plaintiffs' attorneys sent a letter to the Department of Justice saying they were intentionally withholding all community group Signal chats that would otherwise be considered responsive to the government's requests. They turned over smaller Signal group chats but redacted the contact information of non-plaintiffs and any communications that would reveal the priorities, tactics, or strategies of a Signal community group chat. Government attorneys deposed plaintiffs and asked numerous questions about the community Signal group chats, including inquiries about who participated and what was discussed. The protective posture, withholding the broader community chats, producing smaller ones with redactions, and pushing back on deposition questions, is itself now part of the case file.

The First Amendment theory in the case is not a generic privacy claim. The argument, as Nadeau frames it, is that the request itself, by demanding the community organizing infrastructure that makes ICE-watching possible, chills protected activity regardless of what any individual chat says. That is a structural claim about the scope of civil discovery in a civil rights case, not a claim about the content of any particular message. If the court agrees, the protective letter and the redaction practice become a model other organizers can copy. If the court disagrees, the case is a precedent for how a civil discovery tool can be used to pull protest-organizing infrastructure into a court record.

The litigation is at the discovery-dispute stage, where the protective response either stands or breaks. The court can order broader production, narrow the request, or send the parties to argue the First Amendment theory on the merits. Each path is a precedent. The case caption uses "Noem," for Kristi Noem, who was DHS Secretary when the suit was filed. The court, the magistrate handling the discovery fight, and the Department of Justice have not, in available material, stated the government's theory of why a civil discovery request into community Signal chats is consistent with the First Amendment. The next filing, response, or magistrate's ruling will show whether the protective posture holds.