a legal case resulting in an influential 1991 U.S. Supreme Court ruling that a confession that has been coerced cannot or not voluntarily given, can be considered a harmless error. Further, the ruling suggests that it does not violate due process rights if the resulting evidence is considered to be sufficient to convict the defendant.
ARIZONA V FULMINANTE: “Arizona vs.. Fulminante refers to a legal case that set precedent that involuntary confession to a crime may be used to convict a defendant. “