Apt Pupil

Based upon the Stephen King novella of the same name, it's the story of a high school boy's fascination with the Nazi occupation of Europe and the atrocities they committed during World War II. He begins to believe his quiet neighbor is a former Nazi and when he finds out he is, he imprisons the man in his house and forces him to divulge his secrets about any atrocity he committed or had knowledge of, saying that once he has done so, he will be set free.