In May of 1857, the body of Duncan Skinner was found in a strip of woods along the edge of the plantation near Natchez, Mississippi, where he worked as an overseer. Although a coroner's jury initially ruled his death to be accidental, an investigation organized by planters from the community concluded that he had been murdered by three slaves acting under instructions from John McCallin, an Irish carpenter.
Now, almost a century and a half later,...