BOSTON — The flow of information from hospitalized terrorism suspect Dzhokhar Tsarnaev to FBI interrogators stopped abruptly Monday after a federal magistrate, at a bedside proceeding, read him his Miranda rights, according to sources familiar with the investigation.
For 16 hours, the interrogators had questioned the wounded suspect, who was charged Sunday with using a weapon of mass destruction and malicious property damage. They were questioning him under a narrow public-safety exception to the rights that arresting authorities must read arrestees under the landmark 1966 Supreme Court Miranda ruling.
Tsarnaev, 19, stopped cooperating after the Miranda warnings from U.S. Magistrate Judge Marianne B. Bowler, one source said.
The public-safety exception was carved out by the Supreme Court two decades after Miranda in a case over police questioning of a rapist about a missing gun. It was used by authorities successfully in 2009 to interrogate underwear bomber Umar Farouk Abdulmutallab and in 2010 with failed Times Square bomber Faisal Shahzad.
The source said investigators believed they had up to 48 hours to question Tsarnaev before he would be read his Miranda rights.
Rep. Peter King, R-N.Y., assailed the magistrate’s actions. “This was such a productive interrogation, and so much information was coming out,” he said.
Among the revelations Tsarnaev made before the warning, a source said: He and his accused accomplice, his now-dead brother, Tamerlan, acted alone, planned to next attack Times Square and were inspired by online al-Qaida propaganda.
Tsarnaev spoke one word — “No”—when asked if he could afford an attorney.
The defendant, a source said, hasn’t spoken to interrogators since.