ricin letters
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The Georgi Markov Assassination — Cold War Umbrella Murder
Georgi Markov was a Bulgarian dissident writer assassinated in London on 7 September 1978 using a ricin-laced pellet fired from a modified umbrella. He died four days later. No one has been convicted.
The April 2013 Ricin Letters — Mississippi bioterror plot
A bioterror attack in which James Everett Dutschke mailed ricin-laced letters to President Barack Obama, Senator Roger Wicker, and a Mississippi judge in April 2013.
The Ricin Letters Case — Bioweapon Attacks on U.S. Officials
The Ricin Letters Case refers to multiple incidents of poisoned letters mailed to U.S. presidents and officials, notably in 2013 and 2020, resulting in federal convictions for bioweapon use.
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The Kings of Tupelo: A Southern Crime Saga
Netflix docuseries covering the 2013 ricin-letters case in which Paul Kevin Curtis was wrongfully accused of mailing ricin to President Obama, a U.S. Senator, and a Mississippi judge.

The Georgi Markov Assassination — Cold War Umbrella Murder
Georgi Markov was a Bulgarian dissident writer assassinated in London on 7 September 1978 using a ricin-laced pellet fired from a modified umbrella. He died four days later. No one has been convicted.

The April 2013 Ricin Letters — Mississippi bioterror plot
A bioterror attack in which James Everett Dutschke mailed ricin-laced letters to President Barack Obama, Senator Roger Wicker, and a Mississippi judge in April 2013.

The Ricin Letters Case — Bioweapon Attacks on U.S. Officials
The Ricin Letters Case refers to multiple incidents of poisoned letters mailed to U.S. presidents and officials, notably in 2013 and 2020, resulting in federal convictions for bioweapon use.