The Penguin Pool Murder (1932)
The Penguin Pool Murder (1932) is a comedy/mystery film starring Edna May Oliver as Hildegarde Withers, a witness in a murder case at the New York Aquarium, with James Gleason as the police inspector in charge of the case, who investigates with her unwanted help, and Robert Armstrong as an attorney representing Mae Clarke, the wife of the victim. Oliver's appearance was the first of three as Hildegarde Withers, the schoolteacher/sleuth based on the character from the 1931 novel The Penguin Pool Murder by Stuart Palmer. Three other films were made in the series, with other actresses playing the part.
More at Wikipedia.