the letter of the law by having immigrants answer those questions. but they say that's not enough. one specific set of rights migrants often aren't afforded miranda rights. >> you have the right to remain silent. anything you say can and will be used against you in a court of law. >> reporter: the iconic warnings given to u.s. citizens in criminal proceedings. >> illegal immigrants have miranda rights when their charged with a criminal offense but they do not have them when they're charged with an immigration offense. the reason is, among other things, because they don't have the right to counsel. >> reporter: why not mirandize them when they're immediately taken into custody? >> if they say something incriminating or i believe they were involved in criminal activity, i'll read them their rights right there. the other time someone will be