From petty officers to powerful police -- Mid-nineteenth century state prohibition laws introduce limits on progressive era officers -- Acceptance of the exclusionary rule -- Redefining the evil of tortured confessions -- An awakened hatred of wiretapping -- Regulating searches in an era of police harassment and brutality -- Suspects permitted to consent to coercive and deceptive interrogation practices -- Retreat from rules designed to deter misconduct -- Limited progress toward accuracy and preventing brutality