KGB Deaths
Willi Muenzenberg died, hung from a tree, in a French forest, running for his life after release from an internment camp for Germans. The KGB was likely on his trail, he having avoided Stalin's summons to Moscow for a bullet.
Otto Katz? Hung in 1952 in Prague, after a show trial in which he confessed to "a conspiracy against the interests of the state."
Radek? Confessed to treason in a show trail in 1937. Beat to death by a KGB agent in a labor camp.
Jacob Peters was executed in 1938, after a KGB trial.
Alexander Gumberg, the master of handling Americans, lived his cover until a "heart attack" took him out at his estate in Connecticut, in 1938. His two Bolshevik brothers were arrested and sent to Siberian labor camps.
Leo Karakhan, KGB master spy in the Far East, and negotiator of the separate peace with Germany at Brest-Litovsk, bullet to the neck in 1937.