Sergei Tretyakov (intelligence Officer)
Colonel Sergei Tretyakov (5 October 1956, Moscow, Soviet Union – 13 June 2010, Sarasota County, Florida, United States) was a Russian SVR (foreign intelligence) officer who defected to the United States in October 2000.
Read more about Sergei Tretyakov (intelligence Officer): Biography, Book Release, Death and Allegations of Foul Play