Murder, He Says

When a public opinion surveyor working in the mountain district town of Plainville goes missing, fellow surveyor Pete Marshall (Fred MacMurray) is sent as his replacement. Visiting the hillbilly family of Mamie Fleagle (Marjorie Main), Pete begins to suspect with horror that she and her two sons have murdered the surveyor. Pete then comes to believe that Mamie is slowly poisoning wealthy Grandma Fleagle, who has put a vital clue to her fortune in a nonsensical embroidered sampler.