A federal grand jury has indicted a man accused of mailing bomb threats aimed at the Potter Stewart U.S. Courthouse in downtown Cincinnati, according to prosecutors. The indictment identifies the suspect as Robert Mayberry and alleges he sent the threats through the mail between Sept. 9 and Sept. 15, 2025. Authorities have not yet released his age, where he lives, or whether he is currently in custody.
Indictment Details
According to FOX19, the federal grand jury returned the indictment on Thursday, charging Mayberry with transmission of a bomb threat. Prosecutors say he used the mail to threaten to damage or destroy the Potter Stewart U.S. Courthouse on East Fifth Street. The station reports that officials have not released additional information about Mayberry beyond what appears in the charging document.
What the Law Says
Federal law makes it a crime to willfully make a threat by mail or another instrument of interstate commerce to damage or destroy property by fire or an explosive. The offense carries a potential prison term of up to 10 years, as outlined in 18 U.S.C. § 844.
Court Docket and Next Steps
FOX19 reports that the most recent federal court docket in the case does not yet list any scheduled hearings. The outlet notes that Mayberry could appear at any time for a detention hearing at the federal courthouse. It remains unclear whether he is currently being held, and reporters have reached out to federal authorities for clarification.
Local Context
Threats against courthouses and other government buildings are typically treated as high-priority cases in the Tri-State, and specific targets often lead to felony charges. In 2017, posts that allegedly singled out Hamilton County buildings led to a bomb-threat indictment, as reported by WCPO. The Potter Stewart U.S. Courthouse, which houses federal court operations in Cincinnati, is located at 100 East Fifth Street in the city’s downtown core.
What to Watch
Upcoming federal court filings and calendar updates will show whether prosecutors seek to detain Mayberry before trial or pursue additional charges. This story will be updated as federal officials release more information or as new details appear in the public court record.
