Feds Arrest Massachusetts Man For Cyberstalking Stephen Miller and Wife Katie Miller

John Anthony Proia III, a 41-year-old man from Waltham, Massachusetts, has been arrested and charged with cyberstalking former Trump advisor Stephen Miller and his wife, Katie Miller. Proia allegedly sent over 40 harassing phone calls and text messages, including vulgar and disturbing content, to the Millers and Katie Miller’s parents over a period of less than two months between August and September 2026. He used Voice Over Internet Protocol (VoIP) applications to obfuscate his identity and generate new phone numbers for the communications.

• John Anthony Proia III, 41, was arrested and charged with cyberstalking.
• The victims include former Trump advisor Stephen Miller and his wife, Katie Miller.
• Proia allegedly made over 40 calls and sent text messages from August to September 2026.
• Communications included vulgar and disturbing messages directed at the Millers and Katie Miller’s parents.
• VoIP applications were used to obscure Proia’s identity.
• Proia was indicted by a federal grand jury in Boston.