I Bury the Living (1958)

⁣Robert Kraft (Richard Boone) inherits a familial post as the chairman of a small-town cemetery. The centerpiece of the cemetery office is a map of all the plots: White pins signify those claimed, black pins those occupied. When Robert accidentally puts a black pin in the just-purchased plots of a friend (Glenn Vernon) and his new wife, they die in a freak accident. Robert's uncle (Howard Smith) convinces him to make another switch, to see if it's coincidence or something more sinister.