There is only one U.S. government employee who has gone to jail in connection with the widespread torture program by the CIA documented in the executive summary (pdf) of the Senate report that was partially released Tuesday: the man who helped expose it six years ago.
John Kiriakou, who worked for the CIA between 1990 and 2004, stepped forward in 2007 and confirmed to press outlets some of the first details about the agency's widespread use of torture.
Among Kiriakou's revelations was an account to ABC News of the repeated water-boardings of Abu Zubaydah—a man currently imprisoned in Guantanamo Bay without charges whose 12 years of torture and abuse at the hands of the U.S. were further exposed in the Senate report.
In 2013, Kiriakou—a father of five—was prosecuted by the Obama administration under the Espionage Act for allegedly revealing classified information to a reporter. He was sentenced to 30 months in prison, which he is still serving. His incarceration came after the Obama administration refused to prosecute any of the higher-up government officials who designed, authorized, or otherwise took part in implementation of the torture program.