"None of this will bring our beloved Martin back, or reverse the injuries these men inflicted on our family and nearly two hundred others," the Richard family said. "We continue to pray for healing and for comfort on the long road that lies ahead for every victim and their loved ones."
'Boston Stands as One'
Boston sports teams Saturday honored victims of the attacks.
The Boston Red Sox planned a special pre-game ceremony at their Saturday game against the Kansas City Royals, which was played amid heightened security at Fenway Park. Their Friday night game against the Royals was postponed because of the city lockdown and will be played Sunday, the team said.
The Boston Bruins hockey game against the Pittsburgh Penguins, originally scheduled for Friday night, was rescheduled for Saturday afternoon.
The Bruins and Penguins, along with the Red Sox, all plan to auction their Saturday jerseys to support the bombing victims.
Limited-edition T-shirts reading "Boston Stands as One" are being sold by the Boston Celtics to support the victims. Players planned to wear some of the shirts while warming up for Saturday's game, the team said.
The Tsarnaevs' uncle Ruslan Tsarni said their alleged actions were abhorrent.
"You put a shame on our entire family -- the Tsarnaev family -- and you put a shame on the entire Chechen ethnicity," Tsarni said.
Tsarni promised Saturday to help his nephew seek forgiveness from the bombing victims and advised him to tell police everything he knows.
The brothers come from a family originally from the Russian republic of Chechnya and fled the brutal wars there in the 1990s. It's unknown how their Chechen roots may have influenced their alleged actions.
Tsarni said he believes Tamerlan Tsarnaev influenced his younger brother.
FBI agents interviewed the elder Tsarnaev in 2011 at the request of a foreign government that suspected he had ties to extremist groups, the FBI said. It declined to name the government, but a senior U.S. official told CNN on Saturday that it was Russia that made the request of the United States.
The request was based on information that Tamerlan Tsarnaev was a follower of radical Islam, the FBI said, adding it found no evidence of terrorism activity.
"I think unless we see some horrible dropping of the ball, I don't think this is an intelligence failure," said former CIA operative Robert Baer. "In retrospect, it might look like one, but I don't think it is."
The suspects' father, who lives in the Russian republic of Dagestan, told CNN on Saturday that he believes his sons were "never, ever" involved in the Boston attacks. He also said he plans to go to the United States, though he didn't say when.