Massachusetts man indicted on charge of cyberstalking Katie Miller

A Massachusetts man was arrested and indicted Thursday on a federal cyberstalking charge after allegedly contacting podcaster and former political adviser Katie Miller more than 40 times in less than two months and sending disturbing messages to her parents.

John Anthony Proia III, 41, of Waltham, was indicted by a federal grand jury in Boston on one count of cyberstalking, the Justice Department said. He had been arrested earlier in the day, NBC News reported.

The indictment does not name Miller. It describes the alleged victim as a former political adviser and prominent Republican married to a high-level federal government employee. People familiar with the case confirmed her identity to CBS News and NBC News. Miller is married to Stephen Miller, the White House deputy chief of staff for policy.

Prosecutors allege that Proia called and texted Katie Miller repeatedly between August and September 2026, sometimes contacting her several times in a day and calling late at night. He also left voicemails. According to the Justice Department, the calls appeared to come from a man using a menacing tone and often using expletives.

The calls and messages came from an ever-changing series of unfamiliar numbers, the department said. Court filings cited by NBC News say the numbers were generated through internet-based calling and messaging applications that can conceal a user’s identity and provide new numbers.

Proia also allegedly contacted Miller’s parents. In a message to her mother, he called Stephen Miller “evil” and Katie Miller a “creature,” according to the Justice Department. Another message included a photograph of Katie Miller. A text to her father referred to Stephen Miller as a “Jewish Nazi/white supremacist” and asked, “Did you raise her to be trash or did that just happen naturally?”

“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,” U.S. Attorney Leah Foley said in a statement.

Katie Miller wrote on X: “Thank you Todd Blanche, Leah Foley, and the Washington Field Office.” CBS News said it could not immediately reach her or Proia’s attorney for comment.

The indictment follows a dispute over the FBI’s handling of the investigation. Two senior counterterrorism agents in the bureau’s Washington Field Office were demoted after the Millers complained that the agency was not doing enough, CBS News reported. The demotions were first reported by Bloomberg Law. Darren Cox, who leads the field office, said he made the personnel decision, not FBI Director Kash Patel.

CBS News reported that Katie Miller had previously sought an investigation after an activist distributed flyers near the couple’s Arlington, Virginia, home showing Stephen Miller on a “Wanted” poster and listing his address. The incident prompted the Millers to move into military housing. A federal investigation stalled when a judge twice rejected a warrant to search the activist’s phone, and a state prosecutor later said the evidence did not support criminal charges.