The Well (1951)

In a racially-mixed American town, a 5-year-old black girl falls unnoticed into a hidden, forgotten well on her way to school. With nothing better to go on, the police follow up a report that the child was seen with a white stranger, and rumors run wild. Before hapless, innocent Claude Packard is even found, popular hysteria has him tried and convicted. But Packard's troubles pale by comparison as ever more-inflated rumors uncap the well of racial tensions and mob violence. And young Carolyn Crawford, forgotten by most, is still missing.