State of Siege (Costa Gavras, 1972, on Tupamaros)

From http://en.wikipedia.org/wiki/State_of_Siege:

In Uruguay in the early 1970s, before the military dictatorship, an official of the US Agency for International Development (a group used as a front for training foreign police in counterinsurgency methods) played by Montand, is kidnapped by a group of urban guerrillas.

Using his interrogation as a backdrop, the film explores the often brutal consequences of the struggle between Uruguay's government and the leftist Tupamaro guerrillas and expose the American intervention in Latin America Dictatorships and her central role in the violation of human rights on those dark times.