Who Killed Who? is a 1943 Metro-Goldwyn-Mayer film noir animated short directed by Tex Avery. The cartoon is a parody of whodunit stories and employs many clichés of the genre for humor; for example,

William "Billy" Bletcher was an American actor. He was known for his prolific voice acting career for cartoons during the golden age of American animation, most notably Pete in Walt Disney Productions