Who Killed Who?
- Anno: 1943
- Nazione: United States of America
- Genere: Animazione, Commedia, Mistero
- Studio: MGM Cartoon Studio, Metro-Goldwyn-Mayer
- Parola chiave: whodunit, murder investigation, live action and animation, short film
- Direttore: Tex Avery
- Cast: Robert Emmett O'Connor, Tex Avery, Sara Berner, Billy Bletcher, Richard Haydn, Kent Rogers