Incident Summary:

09/19/2020: An assailant mailed a letter containing ricin addressed to President Donald Trump at the White House in Washington, District of Columbia, United States. The letter, which also contained an explicit death threat against President Trump, was intercepted by security officials. Pascale Ferrier, a Canadian citizen, was arrested for sending the letter as she attempted to illegally cross into the United States from Canada with an automatic weapon. A Twitter account linked to Ferrier included similar language to the ricin letter, including calling the President “an ugly tyrant clown.” Ferrier has also been charged with sending a second ricin letter to a police station in Mission, Texas, United States out of personal enmity after being deported in 2019 for an expired visa and weapons charges.



United States

North America

region/u.s. state:

District of Columbia


Attack Information
Type of Attack (more) Unarmed Assault
Successful Attack? (more) No
Target Information (more)
Target Type: Government (General)
Name of Entity Government of the United States
Specific Description President: Donald Trump
Nationality of Target United States
Additional Information
Hostages No
Ransom No
Property Damage No
Weapon Information
Type Sub-type
Weapon Details
A letter containing ricin was used in the attack.
Additional Information
Suicide Attack?No
Part of Multiple Incident?No
Criterion 1 (more) Yes
Criterion 2 (more) Yes
Criterion 3 (more) Yes
Doubt Terrorism Proper (more) No
Perpetrator Group Information
Group Name Claimed Responsibility
Anti-Trump extremists No
Perpetrator Statistics
Number of Perpetrators 1
Number of Captured Perpetrators 1
Casualty Information
Total Number of Casualties 0 Fatalities / 0 Injured
Total Number of Fatalities 0
Number of U.S. Fatalities 0
Number of Perpetrator Fatalities 0
Total Number of Injured 0
Number of U.S. Injured 0
Number of Perpetrators Injured 0
"Ricin Is Said to Have Been Sent to White House," The New York Times, September 19, 2020.
"Canadian woman accused of mailing ricin to Trump pleads not guilty to new charges," Border Report, April 27, 2021.
"Pascale Ferrier Arrested in Connection With Ricin Letter Sent to Trump,", September 22, 2020.