Death of a Champion

Oliver Quade is a pitchman who follows state fairs that feature dog shows---which limits his territory more than a little---at which he sells encyclopedias...and does it well as he possesses a photographic memory that amazes the rubes. The Champion, in the title, is a Great Dane who has won the title at the Rubeville State Fair, and it isn't long before the Champion turns up dead, which is because somebody---motive unknown at the moment---has killed the Champion. (imdb)