PHILADELPHIA, PA — A 42-year-old Haverford man has been charged with federal cyberstalking after prosecutors alleged he used multiple anonymous social media accounts to send approximately 50 threatening and antisemitic messages to a victim, including threats referencing the victim’s family and minor child.
Guangtian Ha, 42, was arrested last week following a federal indictment charging him with cyberstalking, according to U.S. Attorney David Metcalf. A federal judge ordered Ha detained pending trial following a hearing.
The indictment alleges that between approximately Oct. 9, 2025, and May 20, 2026, Ha operated at least four anonymous accounts on the social media platform X to direct threatening and harassing messages toward the victim.
Federal prosecutors allege Ha frequently used virtual private networks to conceal his internet protocol address and make the messages more difficult to trace.
Between January and February 2026, Ha allegedly used an account identified as “America1stLM” to post antisemitic messages targeting the victim, including demands that Jewish residents leave Lower Merion and references to concentration camps.
The indictment also describes a May 10 message allegedly posted through an account identified as “DlGoyim” that threatened the victim’s family and invoked the Holocaust.
Prosecutors further allege that at least one message referenced the victim’s minor child by name and included a warning about the child’s safety. Other posts allegedly disclosed the victim’s residential address and information about the family.
Authorities have withheld the victim’s identity. The indictment describes the messages as conduct reasonably expected to cause substantial emotional distress to the recipient and his family.
In total, prosecutors allege Ha sent approximately 50 messages using at least four X accounts over the seven-month period.
“This online campaign of antisemitic abuse was not only repugnant, but criminal,” Metcalf said, describing the allegations against Ha.
Wayne A. Jacobs, special agent in charge of the FBI’s Philadelphia field office, emphasized the potential consequences of threatening online conduct.
“Cyberstalking and online harassment are far from harmless. These offenses can cause real harm for victims and their families,” Jacobs said.
If convicted, Ha faces a maximum possible sentence of five years in federal prison.
The FBI Philadelphia Newtown Square Resident Agency investigated the case. Assistant U.S. Attorneys Anthony Carissimi, Sima Kazmir and Mark Dubnoff are prosecuting.
All suspects, arrestees, and defendants are presumed innocent until proven guilty in a court of law.
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