Murder Will Out is a 1930 American pre-Code mystery film with songs produced and released by First National Pictures and directed by Clarence G. Badger. The movie stars Jack Mulhall, Lila Lee and features Noah Beery and Malcolm McGregor. The film was based on the short story The Purple Hieroglyph by Murray Leinster writing as Will F. Jenkins, which was published in Snappy Stories on March 1, 1920.