US News

Oklahoma man charged over hundreds of white powder letters sent to officials

Federal authorities unsealed charges against Robin Patrick Martin for allegedly mailing nontoxic powders ahead of elections.

Published Nov 3, 2026 · 19:46 UTC5 reports

The short version

Robin Patrick Martin of Oklahoma faces federal charges for allegedly sending over 700 letters containing white powder to public officials from both political parties.[CBS News]
Investigators reported that tested powders were harmless materials such as yeast or flour, accompanied by messages written in ultraviolet-reactive ink.[CBS News · The Guardian]
Federal court filings state Martin cited grievances regarding the 2020 presidential election, while not all mailed envelopes have completed laboratory testing.[CBS News · The Guardian]

Robin Patrick Martin was charged with conveying hoaxes and mailing threatening communications.[CBS News · The Guardian]
Unsealed court records state Martin mailed more than 700 envelopes to bipartisan officials across the nation.[CBS News]
Tested samples of the white powder were determined to be nonhazardous ingredients including flour or yeast.[CBS News · The Guardian]
Envelopes included text in UV-reactive ink and used return addresses associated with the Green Party and Democratic Socialists of America.[CBS News]
Surveillance footage and purchase records allegedly connected Martin to mailing materials and USPS drop-offs in 2024 and 2026.[CBS News]

The FBI noted in court filings that not all recovered envelopes have undergone full laboratory testing.[The Guardian]

Outlet counts describe coverage, not independent confirmation. Reports may share a wire service or original source.