BOSTON - Boston Marathon bombing suspect Dzhokhar Tsarnaev lay hospitalized in serious condition under heavy guard Saturday - apparently in no shape to be interrogated - as investigators tried to establish the motive for the deadly attack and the scope of the plot.
People across the Boston area breathed easier the morning after Tsarnaev, 19, was pulled, wounded and bloody, from a tarp-covered boat in a Watertown backyard. The capture came at the end of a tense day that began with his 26-year-old brother, Tamerlan, dying in a gunbattle with police.
There was no immediate word on when Tsarnaev might be charged and what those charges would be. The twin bombings killed three people and wounded more than 180.
The most serious charge available to federal prosecutors would be the use of a weapon of mass destruction to kill people, which carries a possible death sentence. Massachusetts does not have the death penalty.
President Barack Obama said there are many unanswered questions about the bombing, including whether the Tsarnaev brothers - ethnic Chechens from southern Russia who had been in the U.S. for about a decade and lived in the Boston area - had help from others. The president urged people not to rush judgment about their motivations.
U.S. officials said an elite interrogation team would question the Massachusetts college student without reading him his Miranda rights, something that is allowed on a limited basis when the public may be in immediate danger, such as instances in which bombs are planted and ready to go off.