Federal authorities unsealed charges Tuesday against an Oklahoma man accused of mailing hundreds of letters containing suspicious substances to members of Congress and other public officials during the 2024 and 2026 election cycles. Court records filed in the U.S. District Court for the Western District of Oklahoma charge Robin Martin with two distinct counts: conveying false or misleading information and hoaxes, and mailing threatening communications.
Arrest and Initial Court Appearance in Oklahoma City
Robin Martin was taken into custody by the FBI’s Oklahoma City field office on Monday. He was scheduled to make his first court appearance Tuesday afternoon in Oklahoma City. Online court records did not immediately list an attorney representing Martin to comment on his behalf.
The investigation into the mailings drew a multi-agency response. Investigators from the FBI Criminal Division, the U.S. Postal Inspection Service, the U.S. Capitol Police, and the Oklahoma City Police Department collaborated to track the source of the letters.
Innocent Baking Materials Caused Widespread Disruption
Laboratory tests revealed that the white powder found inside the envelopes was nontoxic. Authorities identified the substances as common household baking materials, specifically flour or yeast. Despite the lack of hazardous material, the mailings caused widespread disruption.
According to court documents filed in the case, Martin allegedly sent more than 700 letters to election officials across all 50 states ahead of the 2024 election. The campaign expanded to include members of Congress from both political parties. The suspicious packages triggered building evacuations at election offices in at least two states, Louisiana and Oklahoma, including the Secretary of State’s Office in Baton Rouge during early October.
Law enforcement intercepted several letters before they reached their destinations. Specific targets named in federal reporting included U.S. Senators Lisa Blunt Rochester, Alex Padilla, and Kirsten Gillibrand.
False Return Addresses Concealed Sender Origins
Investigators uncovered elaborate steps taken to conceal the origin of the mailings. The 2024 letters featured a return address tied to a business office in Maryland, while letters mailed during the 2026 cycle used a return address previously associated with a Democratic Socialists of America (DSA) office. Neither organization had any connection to the sender.
The DSA provided federal authorities with documentation showing that an individual identifying as “George Livingston” contacted their offices in October, warning staff they would face arrest for treason. Federal complaint records state that some 2024 letters bore hidden messages legible only under ultraviolet light. Investigators traced local purchases of turmeric and vinegar to Martin, materials capable of producing UV-reactive ink.
Federal officials previously issued an advisory on October 23 noting that while lab analysis of the full volume of recovered mail remained ongoing, initial examinations identified no hazardous substances. Authorities nevertheless urged recipients to treat incoming suspicious mail as potentially hazardous while the investigation remained active. The case stands separate from an investigation announced last week against an Illinois man accused of sending threatening messages to members of Congress.
