We remember the generalized imagery of the pre-integration South, but as a person pretty well educated in such matters (or so I like to think) it was still horrifying to be confronted not only by the viciousness of the lynching and murder of Emmett Till but of the Mississippi attitudes that resulted in the acquittal of his killers. Truly, my jaw was open.
Some details received short shrift. Perhaps that is because the film was about the emotional impact of the murder, and the political outcome from it. But if Beauchamp wanted to also cover the "whodunnit" details as he suggested, there were some interesting omissions. Gone was any discussion of the forensic evidence, and although a mention was made that a "confession" was published a year later, why did Beauchamp not tell us what it said? It would have also been interesting to know what the assailants (and the accuser, the woman in the store/wife of a killer) had to say, if anything, before they passed away.
But setting aside what was "missing," what was there is really worth seeing, even if you think you know the story.