| 2003 ricin letters | |
|---|---|
 This envelope was sent to the White House and contained a small vial of ricin powder | |
| Location | Greenville, South Carolina Washington, D.C. |
| Date | October 15, 2003 November 6, 2003 February 2, 2004 |
| Target | U.S. Department of Transportation, The White House |
Attack type | Bioterrorism, Chemical attack, attempted poisoning |
| Weapons | Ricin |
| Deaths | 0 |
| Injured | 0 |
| Perpetrator | Unknown |
| Motive | Retaliation for federal trucking regulations |
The 2003 ricin letters were two ricin-laden letters found on two occasions between October and November 2003. One letter was mailed to the White House and intercepted at a processing facility; another was discovered with no address in South Carolina. A February 2004 ricin incident at the Dirksen Senate Office Building was initially connected to the 2003 letters as well.
The letters were sent by an individual who referred to themselves as "Fallen Angel". The sender, who claimed to own a trucking company, expressed anger over changes in federal trucking regulations. As of 2008, no connection between the Fallen Angel letters and the Dirksen building incident has been established. A $100,000 reward was offered in 2004 by the federal law enforcement agencies investigating the case, but to date the reward remains unclaimed.