Investigators are looking for the explosion of the Boston marathon and whether to participate in, because they have been waiting for the opportunity to interview on Sunday to the surviving ethnic chechen criminal suspect's motives.
Dzhokhar Tsarnaev, 19, in a Boston hospital badly, speechless, on Friday evening after he was caught in a huge manhunt, closed Boston at the end of the year.
His brother, tower, 26 years old, were killed in fighting with the police, earlier on Friday.
Investigators are trying to determine whether others may have certain effect in the pressure cooker is crowded with ball bearing and nails in the Boston marathon on Monday exploded, killing three people and injured 176 bombs detonated.
On to Moscow in January 2012, and spent six months in the region, law enforcement sources said. But it is not clear that what he did, and there he is, if he can unrest in Russia's southern Caucasus region of the islamic militant groups have come into contact.
Authorities have not charge Dzhokhar, the federal public defender's office, on behalf of the criminal suspect who cannot afford lawyers.
Sources have suggested he may face criminal charges on Saturday night from the United States attorney's office in the evening and the justice department officials said it had been before the statement (on Sunday), will be issued.
Questioned the role of the federal bureau of investigation (fbi) also, the agency said that it had put after interviewed tower in 2011, the Russian security services said concerns, he follow islamic militant. The federal bureau of investigation (FBI) said, did not find any "terrorist activities" at the time.
But the criminal suspect's mother, Zubeidat Tsarnaeva, he now lives in Russia, told Russian television tower MEL straight under the FBI surveillance and seven years.
"The New York times quotes unnamed federal officials, authorities held a tower with us citizenship, because the United States federal bureau of investigation (fbi) in 2011.
Records show that the tower was arrested when the police, known as 2009 reports of domestic violence.
The federal bureau of investigation (FBI) think brother right, but investigators to check two brothers, look at the others involved in the contact who is to lead, a senior U.S. law enforcement source said.
Early signs of the brothers to act alone, city police chief Edward Deveau told CNN on Saturday. "From what I know now, the two together, separate action," he said.
Nonetheless, bombing, make contact between the us and Russia, and the kremlin, said by phone last Saturday, the two presidents agreed to strengthen cooperation against terrorism.
Ruth Tsarni, he says, his uncle's brother told CNN, last Saturday, he noticed that changes in the tower in 2009 first put religious views. He suggested that his nephew's radical, and he in the United States "streets of Cambridge (Massachusetts)."
More brother's seemingly contradictory life continues in details on Saturday.
Tower put married Catherine Russell and his family live in north Kingstown, Rhode Island in the upper middle class community. Her father is the emergency room doctor's permission. They have a young child.
Family home door to read a statement: "our daughter today has lost her husband, her children's father, we can't begin to understand how this terrible tragedy to happen."
"Is still unable to speak
Dzhokhar, a student at the university of Massachusetts Dartmouth, was shot in the throat, speechless, his tongue because of injuries, according to sources close to the investigation. It is unclear when he could speak.
"We have one million questions, these questions need to be answered," Massachusetts governor deval Patrick, told reporters on Saturday.
Dzhokhar has been hiding in a boat parked in the back yard of house in the suburbs shuicheng, captured after residents, found blood on the boat, and called the police. He was in Boston's beth Israel deaconess medical center for treatment.
Through a lot of pictures and video from the website in the Boston marathon after carding bombing minutes ago, the United States federal bureau of investigation, two men video released on Thursday and asking the public to help identify.
After several hours, event launched a police officer Sean collier, 26 years old, in the United States at the Massachusetts institute of technology campus and large-scale fighting finally in shuicheng, during this time, police said, the two brothers were throwing bombs deadly shooting. Tower put the wound, and Dzhokhar escape on foot.
The family emigrated to the United States, about ten years ago. Brother took them at an early age in central Asia, kyrgyzstan predominantly Muslim countries 5.5 million chechen people in a small community. In 2001, the family moved to dagestan, Russia's southern provinces, is located in the heart of violent islamist insurgency is now living with their parents.



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