7. Karl Koecher
In 1934, Karl Koecher was born in Czechoslovakia. When he was 28, Koecher joined the Czech intelligence agency. In the mid-1960s, he moved to the United States and received a doctorate in philosophy from Columbia University. Koecher then obtained a position with the CIA and became a spy for the USSR. He is one of only a few people to have penetrated the CIA for the Soviet Union. A large percentage of information on his life has never been revealed.
It is unclear what tipped the CIA off that Koecher was a double agent, but in 1984 he was arrested and accused of being a spy. The CIA attempted to make him turn against the USSR, but Koecher was eventually deemed to be unreliable. After the FBI made mistakes in his case, Koecher was set free. On February 11, 1986, he was part of a spy exchange that involved Anatoly Shcharansky. Upon his return to Czechoslovakia, Koecher was named a hero and given a job with the government.
In 1989, it was suggested that Koecher was involved with the Velvet Revolution, but he denied the claims. After the fall of communism in the USSR, little information was published on his life. However, he has been accused of being connected to the CIA. It was alleged that Koecher was involved in a defrauding scheme that provided Mohammed Al-Fayed with false documents that supported the conspiracy surrounding the deaths of Princess Diana and Dodi Fayed.