John Anthony Proia III
Introduction
John Anthony Proia III is a 41-year-old man from Waltham, Massachusetts who was indicted by a federal grand jury in Boston on October 1, 2026 on one count of cyberstalking, and arrested by the FBI’s Joint Terrorism Task Force the same afternoon. The indictment does not name the alleged victim, describing her only as a former political adviser and prominent figure in the Republican Party who is married to a high-level federal official; an administration official familiar with the investigation confirmed to NBC News that she is Katie Miller, the conservative podcaster married to White House Deputy Chief of Staff Stephen Miller.
Background Information
Little public profile of Proia precedes the case; reporting identifies him only as a Waltham resident, and his lawyer did not immediately respond to a request for comment. The alleged victim, Katie Miller, is described in the available reporting as a former political adviser, a prominent figure in the Republican Party, a former administration official and a conservative podcaster, married to Stephen Miller, one of President Donald Trump’s closest advisers. The investigation became public after two counterterrorism officials at the FBI’s Washington Field Office were demoted and reassigned to lesser positions over issues related to the inquiry, according to sources familiar with the matter cited by the New York Post.
The Controversy or Incident That Led to Their Cancellation
Charged, not adjudicated. Proia faces a federal indictment on one count of cyberstalking returned by a grand jury in the District of Massachusetts. The account below is drawn from the Justice Department’s announcement and the indictment as described in it; the charges are allegations, Proia is presumed innocent unless and until proven guilty, no plea is recorded in the available reporting, and no public statement from him was located.
Prosecutors allege that between August 3 and September 23, 2026, Proia used multiple phone numbers to contact the victim at least 40 times — calls, text messages and voicemails that at times arrived several times a day, including late at night, with calls answered by the victim described as using expletives and a menacing tone. The numbers allegedly came from apps offering free Voice Over Internet Protocol numbers that let users shield their identity and easily generate new ones.
The indictment further alleges Proia sent messages to phone numbers associated with the victim’s parents. One, as quoted in the Justice Department announcement, read: “Hey [first name of victim’s father], how goes it? Hope your daughter marrying a Jewish Nazi/white supremacist is working out for you and [first name of victim’s mother]. Did you raise her to be trash or did that just happen naturally?” Another stated: “My god, how can you be proud of this filth?” The messages reportedly referred to her husband as “evil” and a “Jewish Nazi/white supremacist.”
US Attorney Leah B. Foley of the District of Massachusetts said: “As alleged in the Indictment, the defendant repeatedly and relentlessly targeted the victim, her husband and her family with deeply disturbing communications that profoundly disrupted their lives,” adding that “cyberstalking can inflict real fear and harm, and we take these allegations extremely seriously.” FBI Boston special agent in charge Ted Docks said the task force arrested Proia for “allegedly engaging in a sustained campaign of harassment to frighten this victim and her family, inflicting significant emotional distress.”
Public Reaction and Consequences
Attorney General Todd Blanche wrote in a social media post on X: “This behavior is criminal and will be treated as it should – with prosecution!” Katie Miller reposted Blanche’s message and thanked him; per NBC News she thanked Justice Department officials and FBI agents “for keeping me and my family safe,” adding, “Good to see a Boston grand jury indict this man.” The case drew national coverage within hours because of the target’s identity, with the FBI arrest and the demotions at the FBI’s Washington Field Office raising questions about how the inquiry had been handled inside the bureau.
Current Status
As of October 1, 2026, Proia stands charged with one count of federal cyberstalking — an unadjudicated allegation. He was arrested that afternoon by the FBI’s Joint Terrorism Task Force and was due to make his initial appearance in federal court in Boston at 5 p.m. It was not immediately clear whether he had retained an attorney; his lawyer, if any, did not respond to the New York Post’s request for comment. Assistant US Attorney Alathea E. Porter of the National Security Unit is prosecuting the case.
Impact on Their Career/Life
The indictment places Proia’s name at the center of a nationally covered case touching White House senior staff and the FBI’s own internal handling of the investigation, and a federal felony prosecution by a national-security-unit prosecutor signals a case of ordinary length and complexity ahead. The alleged conduct itself — dozens of anonymous calls and abusive messages directed at one family over seven weeks — is now a matter of public court record. Whatever the outcome, his name is permanently attached to the case in federal court filings and press coverage.
Sources
- U.S. Attorney’s Office, District of Massachusetts, “Massachusetts Man Arrested for Cyberstalking,” October 1, 2026 — source
- Reuters via New York Post, “Massachusetts man charged for cyberstalking Stephen Miller’s wife,” October 1, 2026 — source
- NBC Boston, “FBI arrest over cyberstalking of prominent Republican, feds say,” October 1, 2026 — source
- WCVB, “Waltham man accused of cyberstalking ‘prominent member’ of the Republican Party, DOJ says,” October 1, 2026 — source