Cardinale (D) brutally murdered a woman near New Orleans, and then fled the State. He had been seen with his victim, and a warrant was issued for his arrest. D came to Tucson, Arizona, where he decided to surrender. He flagged down a police car and, after an interruption by the police to warn him that he need not speak, that his speech might be used against him, and that he had a right to contact an attorney, was taken to the station house where he poured out a confession. His confession was introduced in its entirety in the subsequent trial for murder in which petitioner was convicted and sentenced to death. D objects solely to the admission of those parts of his confession which he argues were both irrelevant and prejudicial in his trial for murder. A Louisiana statute requires that confessions must be admitted in their entirety, La. Rev. Stat. 15:450, and petitioner contends that this is unconstitutional. The Supreme Court granted certiorari.