Federal authorities arrested Oklahoma City man for mailing powder filled letters

Federal authorities charged an Oklahoma City man with sending hundreds of letters containing white powder and ominous warnings about treason to public officials ahead of the 2024 and 2026 elections. The powders turned out to be nonhazardous — yeast or flour — though not all letters have been fully tested, the FBI said in a court filing made public Tuesday. Robin Martin is charged with conveying a hoax and mailing threatening communications. The investigation stretched back to 2024 when election officials in multiple states reported mail with a white substance and a three-page letter declaring war. Investigators believe more than 700 mailings this fall appeared to be associated with the same sender. They were addressed to election officials, members of Congress, pollsters, news media and federal law enforcement.