Keith Maitland’s nonfiction account of the Aug. 1, 1966, University of Texas shootings, in which 16 people were killed by a gunman perched in a clock tower, is unlike any other documentary ever made. Maitland combines archival footage, eyewitness testimony and animation to vivid and terrifying effect. But the picture is noteworthy for another reason: What does it mean to have a stranger risk his or her life to save yours? Tower brings that feeling home.
