Secret wars, covert actions, propaganda are major functions of CIA

John Stockwell was one of the first professionals to leave CIA to go public by writing a bestselling book, In Search of Enemies. The CIA retaliated by suing him in the 4th District Court in Washington, D.C.. Part of the suit intended to eliminate the possibility of selling the story for the purpose of making the movie and requested all future publications be submitted to the CIA for review. Unable to afford the travel necessary to contest the case, Stockwell filed for bankruptcy in Austin, Texas. After the litigation was processed through the bankruptcy, the CIA eventually dropped the suit.
A brief story in the book is about a CIA officer having Patrice Lumumba's body in the trunk of his car one night in then Elizabethville, Congo. Stockwell mentions in a footnote to the story that at the time he did not know that the CIA is documented as having repeatedly tried to arrange for Lumumba's assassination.
His concerns were that, although many of his colleagues in the CIA were men and women of the highest integrity, the organization was counterproductive of United States' national security and harming a lot of people in its "secret wars" overseas.