Missing (1982)

"Ed Horman thought that being an American would guarantee his safety. His family believed that being Americans would guarantee them the truth. They were all wrong."

Based on the real-life experiences of Ed Horman. A conservative American businessman travels to Chile to investigate the sudden disappearance of his son after a military takeover. Accompanied by his son's wife he uncovers a trail of cover-ups that implicate the US State department which supports the dictatorship.