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
Bulgarian umbrella Executioner". A type of this umbrella is used even in poliziottesco Italian movie The Police Can't Move in 1975. A Bulgarian umbrella was featured in the 2013 "The Americans" episode, "The Clock". A similar assassination (and attempt) were central to the plot of the 1978 "Quincy, M.E." episode, "Hot Ice". The 2010 episode "Marionette" of "Fringe" begins with an organ thief administering a paralytic with an umbrella. In the AMC series Breaking Bad, season 2, episode 2, Walter White shows his accomplice, Jessie, a small bag of castor beans which he explained, the ricin can be extracted and which was