Show of the week: The Injustice Files

In recent years, the FBI has dug into its pre-1970 files and selected more than 100 racially motivated homicides for reinvestigation. In this documentary series, filmmaker Keith Beauchamp (The Untold Story of Emmett Louis Till) and special agent Cynthia Deitle, the bureau’s Civil Rights Unit chief, look at three such cold cases: the death by car bomb of a Mississippi father of five who was treasurer for a local chapter of the NAACP; the shooting of two police officers on patrol in Bogalusa, La.; and the murder of an activist making a freedom walk. Fridays, Feb. 18–March 4, at 9 p.m., Investigation Discovery