Thomas Hauser, in his 1978 book _The Execution of Charles Horman_(from which the Costa-Gavras film was adpated, I believe), points out that US never held post-coup Chilean gov't responsible for Horman's death. Hauser, whose account points to US foreknowledge of and likely ordering of the execution even as he goes to great lengths to avoid stating that as a conclusion, nonetheless quotes Horman's father Ed in the penultimate chapter:
'I have spent four years of my life investigating the death of my son. Reluctantly, I have reached the conclusion that the government that the government of Chile is being shielded from blame for a very simple reason. If the finger of guilt is pointed at them, they will point it right back at Washington. Our own Embassy was responsible for Charles's death. His life was sacrificed to cover up American actions in Chile.'
...'unfortunate part' my ass, about as unfortunate as US role in destablizing Popular Unity government, planning for and assisting in coup, murdering Allende and thousands of other Chileans, detaining and torturing people in National Stadium in Santiago, supporting Pinochet and military dictatorship... Michael Hoover