Those had seemed to allow the admissibility of physical evidence found as a result of statements made by defendants before they had heard theMirandawarning.
Critics painted the FBI agents as inexperienced locals, saying that reading theMirandawarning ensures non-cooperation and arguing that a more "suitable" entity than the FBI should have been in charge.
He changed his mind partly because most American police forces, which originally opposed theMirandawarning, now embrace it as a useful procedure which reduces courtroom disputes about the voluntariness of confessions.