A post mortem showed ricin poisoning was the cause of death. The lethal dose, estimated at 450 micrograms, was delivered in a pinhead-sized hollow pellet, found during the examination.

(CNN)-- A Nevada man who reportedly poisoned himself with ricin in his Las Vegas motel room pleaded guilty Monday to possession of a biological toxin, prosecutors said. Roger Bergendorff, 57, who ...

Health officials added that there was no evidence of ricin poisoning at the dance event where the attack took place, or that any members of the public were exposed to the toxin. "Following the ...

A Winslow man was sentenced to eight years in prison as part of a plea deal over possession of ricin, according to a news ...