Aldrich Ames
Aldrich Hazen Ames (born May 26, 1941) is a former Central Intelligence Agency counter-intelligence officer and analyst, who, in 1994, was convicted of spying for the Soviet Union and Russia. Until the revelation of the extent of Robert Hanssen's spying seven years later, Ames compromised more CIA assets than any known Soviet mole in American history.
While spending nine years working in CIA counter-intelligence, he declared an annual income of $60,000 but his credit card spending of up to $30,000 a month funded a lifestyle that included a new Jaguar and a $540,000 house (2012 value: $820,000) paid for in cash.
Read more about Aldrich Ames: Some CIA Sources Betrayed