“Killer Ape” by L. Ron Hubbard
Publication date: June 1938
Original publication: Detective Yarns
Genre: Mystery & Suspense
Story description: An orangutan escapes into the woods where he is accused of killing a man. But an animal loving reporter locates the ape before the police find and kill him—and solves the murder.
Currently available as part of the Stories from the Golden Age series, in the title The Slickers.