Sources: Dzhokhar Tsarnaev Stopped Talking After Being Read Miranda Rights

He may have stopped talking but the anonymous sources haven't

Sixteen hours after investigators began interrogating him, the surviving suspect in the Boston Marathon bombings went silent: He'd just been read his constitutional rights.

Dzhokhar Tsarnaev immediately stopped talking after a magistrate judge and a representative from the U.S. Attorney's office entered his hospital room and gave him his Miranda warning, according to a U.S. law enforcement source and four officials of both political parties briefed on the interrogation. They insisted on anonymity because the briefing was private.