Outside court, some bombing survivors said they doubted Tsarnaev's sincerity, given his lack of remorse during the trial.
"It really does not change anything for me," Scott Weisberg said.
But another survivor, Henry Borgard, said: "I was actually really happy that he made the statement. I have forgiven him. I have come to a place of peace and I genuinely hope that he does as well."
U.S. Attorney Carmen Ortiz said Tsarnaev left important things unsaid: "He didn't renounce terrorism, he didn't renounce violent extremism."
Tsarnaev will probably be sent to the death row unit in the state of Indiana. It could take years or even decades for appeals to work their way through the courts.
In May, the jury condemned the former college student to die for joining his older brother, Tamerlan, in setting off the two pressure-cooker bombs near the finish line and in killing an MIT police officer as they fled. Tamerlan, 26, was killed during the getaway.
A somber-looking Tsarnaev, wearing a dark sport jacket with a collared shirt and no tie, sat between his lawyers, his chair turned toward the lectern from which the victims spoke. He picked at his beard and gazed downward most of the time, only occasionally looking at the victims.
Campbell's mother, Patricia Campbell, was the first person to address the court. She looked across the room at Tsarnaev, seated about 20 feet away, and spoke directly to him.
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