Hugo Black,
Chapman v. California — Opinion of the Court
“ Under these circumstances, it is completely impossible for us to say that the State has demonstrated, beyond a reasonable doubt, that the prosecutor's comments and the trial judge's instruction did not contribute to petitioners' convictions. Such a machine-gun repetition of a denial of constitutional rights, designed and calculated to make petitioners' version of the evidence worthless, can no more be considered harmless than the introduction against a defendant of a coerced confession. ”
