William O. Douglas,
Coppola v. United States — Dissent
“ The fact that the interrogation took place in the cell of a state police station rather than in the cell of a federal jail or prison only accentuates the evasion of the Rule. In this case the federal agents used an illegal detention as the occasion to carry on a secret interrogation. What the federal agents cannot do in federal precincts they cannot do in a state jail. What we do today is to permit federal agents to flout the federal law so long as they let the accused stay in a state jail and interrogate him there to their hearts' content. ”
