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David Henry Barnett was a CIA officer who was convicted of espionage for the Soviet Union in the 1980s. Barnett was the second CIA officer to be convicted after Edwin Moore II, a retired CIA employee who was arrested by the FBI in 1976 after attempting to sell classified documents to Soviet officials.
David Barnett was initially a Special Agent of the U.S. Army Counter Intelligence Corps (CIC), serving with the 308th CIC Detachment in Seoul, Korea in 1958 and January 1959. He served in the S2 - Counter Subversive Section. Barnett was released from the U.S. Army and hired by the CIA in January 1959, after which he stayed in Korea for approximately one year.
From the 1960s until 1970, Barnett was employed by the CIA, working in both the United States and Asia. Barnett was stationed in Indonesia from 1967 until 1970 and before that, in South Korea. He was also a teacher and wrestling coach at Kiskiminetas Springs School in Saltsburg, PA during the 1970s. After leaving his teaching position at Kiski, Barnett returned to Indonesia to administer a shrimp processing company. Within six years, he had amassed debts of over $100,000 and faced imminent financial ruin.
Over the next three years in meetings held in the Embassy of the Soviet Union in Vienna, Barnett revealed to the KGB the identities of almost 30 CIA officers. Additionally, he handed over a great deal of classified information gathered by the CIA on a clandestine operation, code-named HA/BRINK, that had focused on the acquisition of examples of Soviet military hardware sold to the Indonesians during the Sukarno era, including an SA-2 guidance system, designs for the Whiskey-class submarine, the Riga class frigate, the Sverdlov class cruiser, the P-15 Termit anti-ship missile and the Tu-16 Badger bomber. He also compromised CIA operations and informants in Indonesia and South Korea. The Soviets paid him a total of $92,000 for information received between 1976 and 1980.
On instructions from his KGB handlers, which included Oleg Kalugin, Barnett applied for staff positions on the Senate and House intelligence committees and the President's Intelligence Advisory Board but was unsuccessful in finding a job. In January 1979, he was rehired by the CIA as a contract agent and if undetected, he could have gone on to betray further CIA secrets.
Later in the year, Barnett was identified as a spy following the release of information provided by Col. Vladimir M. Piguzov, a KGB officer stationed in Jakarta who had been recruited as a double agent by the CIA. Piguzov himself was betrayed by Aldrich Ames in 1985 and subsequently executed. Barnett was questioned by the Federal Bureau of Investigation and resigned from his CIA job. In October 1980 Barnett pleaded guilty to espionage charges, admitting that he had sold CIA secrets to the Soviets. He was sentenced to 18 years imprisonment and was paroled in 1990.
David Barnett married his wife, Sarah Blount, after they met in the 1960s in Washington, DC. Blount had moved to DC in 1964 to work for the Office of Economic Opportunity, and Barnett was in between overseas tours. The married after only four weeks of dating, although at the time Blount believed Barnett worked in the Foreign Service, not the CIA.
Barnett and his wife were soon stationed in Indonesia, where he ultimately revealed his true position with the CIA to Sarah. She claims that his frequent secrecy with his job is what led to her lack of suspicion when he began working with the Soviets.
Barnett and Sarah had three children: Charles, John Henry, and Dorsey, who were between the ages of 12 and 6 at the time of their father's incarceration. 
Barnett died just three years after he was paroled, on November 19, 1993.