The Body Snatcher.

Boris Karloff and Bela Lugosi star in a classic Robert Lewis Stevenson tale ... which was itself based on a true story of notorious grave robbers. To conduct his humanitarian research, a doctor in Edinburgh, Scotland, needs a constant supply of fresh corpses--provided by his evil henchman (Karloff), who steals bodies from the graveyard. But when the cemetery runs short, the grave robber turns to murder.