John R. Stockwell is a former CIA officer who became a critic of United States government policies after serving in the Agency for thirteen years serving seven tours of duty. After managing U.S. involvement in the Angolan Civil War as Chief of the Angola Task Force during its 1975 covert operations, he resigned and wrote 'In Search of Enemies'. Wikipedia*
On the C-SPAN Networks:
John Stockwell has one video in the C-SPAN Video Library; the first appearance was a 1989 Speech.