SPOKANE, Wash. (AP) — The FBI has arrested a suspect in a case involving the discovery of a pair of letters containing the deadly poison ricin and says investigators are working “around the clock” to address any remaining risks.
The U.S. attorney’s office for eastern Washington had no comment on whether additional charges might be sought.
Matthew Ryan Buquet, 37, was arrested Wednesday.
A grand jury indictment accused him of mailing a death threat to U.S. District Judge Fred Van Sickle in Spokane on May 14.
The indictment did not mention ricin, but the FBI made the link in a news release late Wednesday, saying analysis showed the letter sent to the judge contained “active ricin toxin.”