No matter - my point still stands as anything in the Constitution can be changed by a future Amendment. And that means ANYTHING.RIGHT TO SILENCE:
Main article: Fifth Amendment to the United States Constitution
The Fifth Amendment to the U.S. Constitution provides that no person shall be compelled in any criminal case to be a witness against himself. At trial, the prosecution can neither call the defendant as a witness, nor comment on the defendant's failure to testify. Whether to testify or not is exclusively the privilege of the defendant. 
Outside the context of detention or arrest, a person has no duty to answer any questions of police at all; and if judicial compulsion is sought by the State, the person can still invoke his Fifth Amendment privilege against compulsory self-incrimination, and refuse to comply. Only if granted immunity by the state, in a formal proceeding, from having any testimony or evidence derived from the testimony used against him, can a person be compelled to answer over an assertion of this privilege.  If police detain (or arrest) a person, they must advise him that he has a right to remain silent, and the right to an attorney, among other rights. If the detained person invokes these rights, all interrogation must cease, and nothing said by the defendant in violation of this rule can be admitted against him at trial.