»Miranda v. Arizona« (1966) und die effektive Garantie der Selbstbelastungsfreiheit-zwei Mythen des amerikanischen Verfassungsrechts?

You have the right to remain silent when questioned. Anything you say or do may be used against you in a court of law. You have the right to consult an attorney before speaking to the police and to have an attorney present during questioning now or in the future. If you cannot afford an attorney, one will be appointed for you before any questioning, if you wish. [. . .] (Möglicher Wortlaut einer polizeilichen Beschuldigtenbelehrung nach »Miranda v. Arizona«)