Between 1979 and 1981, at least 30 children and young people were murdered in a series of crimes that terrorized Atlanta. But these killings of black children, who often came from low-income families, never lodged themselves in the American psyche the way that near-contemporaneous murders by the likes of Ted Bundy and Richard Ramirez did. Now, as HBO airs the documentary series Atlanta’s Missing and Murdered: The Lost Children, the city is re-examining evidence in the case, and creating a permanent memorial to its children.