Peter Deriabin

Peter Sergeyevich Deriabin (Russian: Петр Сергеевич Дерябин; 1921 – 20 August 1992) was a KGB officer who defected to the United States in 1954. After his defection, he worked for the Central Intelligence Agency, and wrote several books on the KGB. He died in 1992 at the age of 71. Provided by Wikipedia