Home Seattle Press Releases 2013 Additional Threatening Letters Now Part of Spokane, Washington Ricin Investigation
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Additional Threatening Letters Now Part of Spokane, Washington Ricin Investigation
Envelopes Addressed to the President of the United States and Fairchild Air Force Base Seized; Additional Letter Known to be Addressed to the Central Intelligence Agency

FBI Seattle May 30, 2013
  • Public Affairs Specialist Ayn Dietrich-Williams (206) 622-0460

A letter containing a suspicious substance and a threat to a federal district court Judge in Spokane was intercepted on Tuesday, May 14, 2013 at the U.S. Post Office on W. Riverside Avenue in Spokane, Washington. Subsequent analysis performed by the Spokane Regional Health District, and later confirmed by the FBI at the National Bioforensic Analysis Center (NBFAC), indicated the substance in the letter contained active ricin toxin.

On May 22, 2013, the Federal Bureau of Investigation (FBI) arrested MATTHEW RYAN BUQUET, 38, for allegedly sending the letter. Earlier that day, he was charged by a one-count grand jury indictment for mailing threatening communications.

A total of five similar letters have been seized or detected:

  1. Letter sent to the federal district court judge in Spokane, intercepted on May 14, 2013;
  2. Letter sent to the W. Riverside Post Office in Spokane, intercepted on May 14, 2013;
  3. Letter sent to the president of the United States in Washington, D.C., intercepted on May 22, 2013;
  4. Letter sent to Fairchild Air Force Base near Spokane, located on May 22, 2013; and
  5. Letter sent to the Central Intelligence Agency, detected on May 22, 2013.

Subsequent analysis by the FBI at the NBFAC indicated the substance in the letters sent to the president of the United States, the federal district court judge, and the Spokane post office contained active ricin toxin. The contents of the Fairchild letter continue to undergo testing at the NBFAC.

Investigators have determined that the fifth letter, addressed in a manner consistent with the first four envelopes, was sent to the Central Intelligence Agency (CIA). This letter was addressed to a location that does not receive mail deliveries. As of May 30, 2013, this letter has not been located by law enforcement authorities. Active monitoring of the mail stream continues in an effort to locate this letter and mitigate any risk its contents might pose.

The four envelopes in the possession of law enforcement officials were postmarked in Spokane on May 13, 2013. Each addressee was handwritten in red ink. The fifth letter, with a handwritten address of “Central Intelligence Agency” in McLean, Virginia, was probably also postmarked on May 13, 2013 and penned in red ink. In the unlikely event a letter fitting this description is encountered by a member of the public, the envelope should not be opened or handled and law enforcement authorities should be notified immediately.

Ricin is a poison found naturally in castor beans. Ricin poisoning can occur when the substance enters the body through ingestion, inhalation, or injection. To date, the FBI is not aware of any illness as a result of exposure to these letters. Public health questions should be directed to public health officials. In the state of Washington, the Department of Health may be contacted at 800-525-0127.

The United States Attorney’s Office for the Eastern District of Washington is fully engaged in this matter and has made no comment on whether additional charges may be sought in connection with the continuing FBI and U.S. Postal Inspection Service (USPIS) investigation.

An individual charged with a criminal offense is presumed innocent unless and until he or she is proven guilty beyond a reasonable doubt in a court of law.


  • FBI Seattle Division: Public Affairs Specialist Ayn S. Dietrich, ayn.dietrich@ic.fbi.gov
  • United States Postal Inspection Service-Seattle Division: Assistant Inspector in Charge James F. Wilson, jfwilson@uspis.gov

Press Release - May 22, 2013: FBI Arrests Individual in Connection with Threatening Letter Containing Ricin