Faulkner's "An Error in Chemistry," on screen.

"An Error in Chemistry" (1954) is an episode of Climax! adapted from a 1946 EQMM story by William Faulkner (one of his stories with lawyer Gavin Stevens collected in Knight's Gambit). Edmond O'Brien is a carnival huckster who readily confesses to killing his wife; also featured is Lon Chaney Jr.