Aldrich Hazen Amesis an American CIA analyst, turned KGB mole, who was convicted of espionage against his country in 1994. He is serving a life sentence without the possibility of parole in the high-security Allenwood U.S. Penitentiary. Ames was formerly a 31-year CIA counterintelligence officer and analyst who committed espionage against his country by spying for the Soviet Union and Russia. So far as it is known, Ames compromised the second-largest number of CIA agents, second only to Robert Hanssen...
(wikipedia)