New Bedford, Massachusetts (CNN) -- The Boston bombing suspect has become less talkative since authorities read him his Miranda rights before charging him with using a weapon of mass destruction. They also moved him from a private to a prison hospital.
But the information Dzhokhar Tsarnaev, 19, gave investigators in two sessions of questioning spanning three days has produced good leads, a U.S. law enforcement official said.
Investigators have completed combing a dump in New Bedford, Massachusetts, for clues that could shed light on the suspects behind the bloody attack, said FBI spokeswoman Laura Eimiller, who wouldn't say whether they turned up anything.
They were looking for Tsarnaev's laptop, a law enforcement official with knowledge of the investigation said.
Tsarnaev led authorities to look there, the source said, and others who may have knowledge of the computer's whereabouts or may have played a role in disposing it also provided leads that prompted the search.
The FBI says it has also processed the boat on which Tsarnaev was captured. The vessel has been taken to an undisclosed location where evidence is being stored.