Earl Warren,
Fahy v. Connecticut — Opinion of the Court
“ It may well be that a confession is never to be considered as nonprejudicial. In any event, the standard applied here required a determination that exclusion of the unconstitutional evidence could not have changed the outcome of the trial. That is a much stricter standard than that of independently sufficient evidence, which leaves open the possibility that the trier of fact did rely on the unconstitutional evidence and, therefore, would have reached a different conclusion if the evidence had been excluded. ”
