The FBI says four similar letters were postmarked the same day , with similar ink . Comment: The FBI is looking for a letter that was directed to the CIA . All five letters are believed to have been sent from Spokane around May 13 .
The FBI says four similar letters were postmarked the same day , with similar ink . Tests show three of those letters had ricin ; tests are pending on the fourth one . The FBI is looking for a letter that was directed to the CIA . All five letters are believed to have been sent from Spokane around May 13 .