Incident Summary:

03/26/1998: Kathryn Schoonover sent envelopes filled with cyanide to several police officers, city officials, and mental health workers in Marina Del Rey, California, U.S.A. No injuries were reported in the incident.



United States

North America

region/u.s. state:


Los Angeles

Attack Information
Type of Attack (more) Unarmed Assault
Successful Attack? (more) No
Target Information (more)
Target Type: Government (General)
Name of Entity Marina Del Rey
Specific Description Police officers, city officials, and mental health workers in Marina Del Rey, California
Nationality of Target United States
Additional Information
Hostages No
Ransom No
Property Damage No
Weapon Information
Type Sub-type
Chemical Poisoning
Weapon Details
Cyanide mailed to victims inside of letters.
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) Yes
Alternate Designation (more) Other Crime Type
Perpetrator Group Information
Group Name Claimed Responsibility
Unknown 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
"Woman Arrested in Post Office," The Associated Press, August 24, 1998.
Linda Deutsch, "Bald, Emaciated Woman Arraigned in Cyanide-Mailing Case," The Associated Press, August 27, 1998.
John M. Glionna and Richard Winton, "Suspect in Poisoning Try Has Troubled Life," Los Angeles Times, August 26, 1998.