Murder!

Murder is a 1930 British drama film cowritten and directed by Alfred Hitchcock and starring Herbert Marshall, Norah Baring and Edward Chapman. Written by Hitchcock, his wife Alma Reville and Walter C. Mycroft, it is based on a novel and play called Enter Sir John by Clemence Dane and Helen Simpson. It was Hitchcocks third alltalkie film, after Blackmail and Juno and the Paycock.

Diana Baring Norah Baring, a young actress in a travelling theatre troupe, is found in a daze with blood on her clothes, standing by the murdered body of another young actress, Edna Druce. The poker used to commit the murder was at Dianas feet, but she has no memory of what happened during the minutes the crime was committed. The two young women were thought to have been rivals, and the police arrest her. Diana withholds some important information deliberately, to protect something about the identity of a man that she will not name.At her trial most of the jury are certain she is guilty. One or two feel that she may have a severe mental illness which meant that she really did have no memory of killing the other woman, but they are convinced that she should still be hanged lest she strike again. One juror, Sir John Menier Herbert Marshall, a celebrated actormanager, seems sure she must be innocent, but is browbeaten into voting guilty along with the rest of the jury. Diana is imprisoned, and awaiting hanging. ........

Source: Wikipedia