SPOKANE, Wash. -- FBI scientists revealed Friday that a letter sent from Spokane to the Central Intelligence Agency contained ricin.
Scientists tested the letter at the National Bioforensic Analysis Center. Postal workers tracked down the letter on June 8th at the U.S. Post Office on W. Riverside Avenue in Spokane.
The letter was not delivered and was returned to Spokane according to FBI agents. Postal workers found the envelope unopened. FBI employees said the letter was not leaking any materials.
The FBI and United States Postal Inspection Service (USPIS) are not aware of any injuries or illnesses caused by any of the five letters recovered during the course of this investigation. No other suspect letters associated with this investigation are known to be in the mail system.
Federal authorities arrested Matthew Ryan Buquet in May for allegedly sending the letters. Authorities also searched Buquet’s apartment in Browne’s Addition. He faces a one-count grand jury indictment for mailing threatening communications.
Investigators said Buquet allegedly sent four other letters. The letters were addressed to Fairchild Air Force Base, a judge in Spokane, the White House, and the Downtown Spokane post office. All of the letters tested positive for ricin.