The Thin Blue Line is a 1988 American documentary film by Errol Morris, depicting the story of Randall Dale Adams, a man convicted and sentenced to life in prison for a murder he did not commit. Adams' case was reviewed and he was released from prison approximately a year after the film's release

A controversial and true story of the arrest and conviction of Randall Dale Adams for the murder of a Dallas policeman in 1976. This documentary, with its use of expressionistic re-enactments and interview material, is credited with overturning the conviction of Adams for the murder of Dallas police officer Robert Wood, a crime for which Adams was sentenced to death.