Murder Most Foul

Murder Most Foul is the third of four Miss Marple films made by MetroGoldwynMayer. Loosely based on the novel Mrs McGintys Dead by Agatha Christie, it stars Margaret Rutherford as Miss Jane Marple, Bud Tingwell as Inspector Craddock, and Stringer Davis Rutherfords reallife husband as Mr Stringer. The story is ostensibly based on the original Christie story, but notably changes the action and characters. Hercule Poirot is replaced by Miss Marple and most other characters are not in the original story.

Margaret McGinty, a barmaid and former actress, is found hanged, and her lodger, Harold Taylor, caught at the scene, seems plainly guilty. Everyone believes it to be an openandshut case ... except for Miss Marple. She is the lone holdout in the jury that tries him, leading to a mistrial.Despite the disapproval of Inspector Craddock Bud Tingwell, Miss Marple decides to delve into the case. She poses as a gatherer for a church jumble sale to enter and search Mrs. McGintys home. She finds a newspaper with words cut out and several programs for a murder mystery play, Murder She Said, recently performed in the town. These clues lead her to suspect Mrs. McGinty of having blackmailed a member of the repertory company. ........

Source: Wikipedia