Murder on a Sunday Morning (French: Un coupable ideal) is a documentary film by French filmmaker Jean-Xavier de Lestrade. Its subject is the Brenton Butler case, a criminal case in which a fifteen-year-old boy was wrongfully accused of murder. The film won the Academy Award for Best Documentary Feature at the 74th Academy Awards in 2002.
Brenton Butler was arrested and tried for the 2000 murder of a tourist in Jacksonville, Florida. The prosecution's case relied heavily upon a positive identification made by the victim's husband, and on Butler's confession, which the teen claimed was coerced. The film follows Butler's defense team building their case for his innocence.