Everyone has a reason to hate Nelson Rood. He has threatened to prosecute his playboy nephew Rex Leland if he ever writes another forged check and he has quarreled with Laura Leland, his sister and Rex’s mother. He has kicked private investigator Nick Halstead off the land where he is camping, and in the process alienated his daughter Marian, who is in love with Nick. He is cruel to his servants, Esteban and Rosita, so when he finds a black doll, a symbol of death, on his desk, he suspects almost everyone. He sends for two men, Walling and Mallison, who were involved in a Mexican mine with him years ago. The two men deny any knowledge of the doll, but they think it has something to do with the death of the fourth partner, Barrows, who was killed by Rood years ago. That night, Rood is stabbed to death as he stands at the door of Marian’s room. Marian runs out to Nick’s trailer, and he begins to investigate the murder when bumbling local sheriff Renick fails to find the murderer. During the night, Estaban is killed protecting Marian. Nick discovers another body, that of Mallison, and he also finds out that Dr. Giddings and Mrs. Laura were to have been married, but Rood prevented them. Nick suspects that Marian is not Rood’s daughter, but Barrow’s, and when that fact is confirmed, he knows that Giddings is the murderer. More on Wikipedia or Mubi
Watch The Black Doll (1938)