SPOKANE, Wash. (AP) — A man was arrested Wednesday in a case involving last week's discovery of a pair of letters containing the deadly poison ricin.
A grand jury indictment accuses Matthew Ryan Buquet, 37, of mailing a death threat to U.S. District Judge Fred Van Sickle in Spokane on May 14.
A search of federal court records turned up no indication that Buquet had ever appeared before Van Sickle or had any connection to the judge.
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."
The U.S. Postal Service said last week that two letters were intercepted — one addressed to the courthouse and the other to the downtown post office — and they contained ricin in a crude form that did not immediately pose a threat to workers.
"Our coordinated team acted swiftly to resolve a potentially dangerous situation, and continues working tirelessly around-the-clock to investigate the origin of the letters and to address any remaining, potential risks," Laura Laughlin, the special agent in charge of the FBI's Seattle office, said in a statement.
Buquet appeared in federal court in Spokane after the FBI said agents arrested him Wednesday afternoon. He pleaded not guilty to mailing a threatening communication.
The short, balding Buquet wore dark-tinted glasses and was shackled in court. He gave brief "yes" and "no" answers to questions from U.S. Magistrate Judge Cynthia Imbrogno.
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