I have not seen the movie but have read about the actual case the movie and book is set on. MacDonald did not kill his family. The author of the book made this story up and real facts of the case and MacDonald's life prove that the author is lying. MacDonald is in jail right now for these murders but only because the Army officials investigating the case lied, changed actual evidence to make him seem guilty, and did a poor job of gathering evidence at the crime scene. The truth as been slowly coming out since MacDonald's conviction. The real murders and a girl who was with the murders and witnessed the murders, have even confessed to the authorities and other people.