Ricin immunogenic in mice, rabbits, and humans. It has completed two successful clinical trials. Ricin has been involved in a number of incidents. In 1978, the Bulgarian dissident Georgi Markov was assassinated by Bulgarian secret police who surreptitiously shot him on a London street with a modified umbrella using compressed gas to fire a tiny pellet contaminated with ricin into his leg. He died in a hospital a few days later and his body was passed to a special poison branch of the British Ministry of Defence (MOD) that discovered the pellet during an autopsy. The prime suspects were the Bulgarian
Poisoned candy myths However, none of these claims were sustained upon investigation. In a 1974 case, an 8-year-old boy from Deer Park, Texas, died after eating a cyanide-laced package of Pixy Stix. A subsequent police investigation eventually determined that the poisoned candy had been planted in his trick-or-treat pile by the boy's father, Ronald Clark O'Bryan, who also gave out poisoned candy to other children in an attempt to cover up the murder, though no other children consumed the poisoned treats. The murderer, who had wanted to claim life insurance money, was executed in 1984. In this case, the distribution of poisoned candy