Just reading the book “The man with the poison gun” by Serhii Plokhy. The book covers the story of an assassin, Bogdan Stashinsky, who killed Ukrainians, Lev Rebet in 1957, and Stepan Bandera in 1959. The device used produced a cloud of hydrogen cyanide. The book states that the KGB device was a development/improvement on a German World War 2-era liquid poison gun.
Does anyone know anything about German “Liquid Poison” gun?