Commonly referred to as a lynching, that description of the 1955 murder of 14-year-old Emmett Till doesn't do the crime justice: Young Emmett -- whose crime was whistling at a white woman -- was castrated, shot, chopped with an ax, and had his teeth knocked out and tongue cut off before being tied to a cotton gin and thrown in the river. His killers were acquitted, though years later they confessed without penalty. Till's death was not in vain -- it helped kick the civil rights movement into high gear, as people realized that even children were not safe. Yet some of those who were accomplices to the crime still live, and go unpunished. Keith Beauchamp's documentary footage got the case reopened last year, and now we get to see it too, including (viewer beware) stark photos of Till's mutilated face. It seems all too easy nowadays to consider this stuff ancient history, and to dismiss the NAACP; Beauchamp's bracing wake-up call shows otherwise.