Ricin was used in the 1978 assassination of Bulgarian dissident Georgi Markov. The author, who had defected nine years earlier, was jabbed by the tip of an umbrella while waiting for a bus in ...

Jason Kale Clampit was sentenced to eight years in prison for making ricin, a biological weapon favored by assassins and ...

Ricin made international headlines when a communist agent killed a defector to the West using a poison-tipped umbrella on a bridge in London in 1978. Georgi Markov, a novelist and playwright ...