Bulgarian dissident Georgi Markov was killed by poison dart filled with ricin and fired from an umbrella ... by the technical staff of the Soviet KGB and seems to have involved many senior members ...

(CNN)-- Ricin, a poison thought to have been found in a Las Vegas, Nevada, hotel room Thursday, can be made from the waste left after processing castor beans, according to the Centers for Disease ...

(CNN) — Police in Germany have raided the home of a teenage boy suspected of making and storing ricin, a highly toxic and deadly biological warfare agent. (CNN) — Police in Germany have raided ...

A teenager in eastern Germany is accused of producing the deadly biological warfare agent ricin in his family's attic. Police said the suspect remains at large. Police in Germany searched the home ...