Dzhokhar Tsarnaev

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In this Dec. 18, 2014, courtroom sketch, Boston Marathon bombing suspect Dzhokhar Tsarnaev sits in federal court in Boston for a final hearing before his trial begins in January. More than 30 victims of the Boston Marathon bombing and their family members are expected to describe the attack’s impact on their lives before a judge formally sentences Tsarnaev to death. Tsarnaev’s sentencing hearing is scheduled for Wednesday, June 24, 2015, in U.S. District Court. (Jane Flavell Collins via AP, File)

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National Edition News cover for May 16, 2015 - Dzhokhar Tsarnaev gets death penalty for Boston Marathon bombing: In this photo provided by the Massachusetts State Police, Boston Marathon bombing suspect Dzhokhar Tsarnaev, bloody and disheveled with the red dot of a sniper's rifle laser sight on his head, emerges from a boat at the time of his capture by law enforcement authorities in Watertown, Mass., on April 19, 2013. (Associated Press/Massachusetts State Police, Sean Murphy) **FILE**

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A relative of Dzhokhar Tsarnaev leaves federal court in Boston after testifying Monday, May 4, 2015, during the penalty phase in Tsarnaev's trial. Tsarnaev was convicted of the Boston Marathon bombings that killed three and injured more than 260 people in April 2013. (AP Photo/Steven Senne)

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In this courtroom sketch, defense attorney David Bruck addresses the jury during the penalty phase in the trial of Dzhokhar Tsarnaev, seated at right, on Monday, April 27, 2015, in federal court in Boston. Tsarnaev, 21, was convicted in the twin bombings that killed three spectators and wounded more than 260 other people near the finish line of the Boston Marathon on April 15, 2013. He was also convicted of killing an MIT police officer during the getaway attempt with his brother. (Jane Flavell Collins via AP)

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In this courtroom sketch, Dzhokhar Tsarnaev, second from left, is depicted standing with his defense attorneys William Fick, left, Judy Clarke, second from right, and David Bruck, right, as the jury presents its verdict in his federal death penalty trial Wednesday, April 8, 2015, in Boston. Tsarnaev was convicted on multiple charges in the 2013 Boston Marathon bombing. Three people were killed and more than 260 were injured when twin pressure-cooker bombs exploded near the finish line. (AP Photo/Jane Flavell Collins)

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Dzhokhar Tsarnaev "wanted to punish America," a prosecutor told the jury in closing arguments Monday. His attorneys said Mr. Tsarnaev did indeed carry out the attacks but was under the influence of his brother, Tamerlan, who the attorneys said orchestrated the plot and built the bombs. Tamerlan was killed while trying to flee from police. (Associated Press)

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In this courtroom sketch, Assistant U.S. Attorney Aloke Chakravarty is depicted pointing to defendant Dzhokhar Tsarnaev, right, during closing arguments in Tsarnaev's federal death penalty trial Monday, April 6, 2015, in Boston. Tsarnaev is charged with conspiring with his brother to place two bombs near the Boston Marathon finish line in April 2013, killing three and injuring 260 people. (AP Photo/Jane Flavell Collins) ** FILE **

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In this courtroom sketch, Dzhokhar Tsarnaev, center seated, is depicted between defense attorneys while the boat in which he was captured in sits on a trailer for observation during his federal death penalty trial, Monday, March 16, 2015, in Boston. Tsarnaev is charged with conspiring with his brother to place two bombs near the Boston Marathon finish line in April 2013, killing three and injuring more than 260 people. (AP Photo/Jane Flavell Collins)

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People leave federal court to board a bus carrying Boston Marathon bombing survivors, family and friends after attending the federal death penalty trial of Dzhokhar Tsarnaev in Boston, Thursday, March 12, 2015. Tsarnaev is charged with conspiring with his brother to place two bombs near the Boston Marathon finish line that killed three and injured more than 260 people in April 2013. (AP Photo/Elise Amendola)

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In this courtroom sketch, Dun Meng, far right, testifies with a translator at his side during the federal death penalty trial of Boston Marathon bombing suspect Dzhokhar Tsarnaev in Boston, Thursday, March 12, 2015. (AP Photo/Jane Flavell Collins)

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In this photo provided by the Massachusetts State Police, Boston Marathon bombing suspect Dzhokhar Tsarnaev, bloody and disheveled with the red dot of a sniper's rifle laser sight on his head, emerges from a boat at the time of his capture by law enforcement authorities in Watertown, Mass., on April 19, 2013. (Associated Press/Massachusetts State Police, Sean Murphy) **FILE**

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Boston Marathon bombing suspect Dzhokhar Tsarnaev, left, is depicted beside U.S. District Judge George O'Toole Jr., right, as O'Toole addresses a pool of potential jurors in a jury assembly room at the federal courthouse, in Boston, in this Jan. 5, 2015, file photo. (AP Photo/Jane Flavell Collins, File)

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Boston Marathon bombing suspect Dzhokhar Tsarnaev, above in courtroom sketch, came to the U.S. with his family in 2002. (AP Photo/Jane Flavell Collins, File)

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In this courtroom sketch, Boston Marathon bombing suspect Dzhokhar Tsarnaev is depicted sitting in federal court in Boston Thursday, Dec. 18, 2014, for a final hearing before his trial begins in January. Tsarnaev is charged with the April 2013 attack that killed three people and injured more than 260. He could face the death penalty if convicted. (AP Photo/Jane Flavell Collins) ** FILE **

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Robel Phillipos, a college friend of Boston Marathon bombing suspect Dzhokhar Tsarnaev, arrives at federal court to attend his trial in Boston on Oct. 16, 2014. Phillipos is charged with lying to the FBI about being in Tsarnaev's dorm room while two other friends removed a backpack containing fireworks and other potential evidence several days after the April 15, 2013, attack. (Associated Press) **FILE**

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FILE - In this May 15, 2014 file photo, Robel Phillipos, a college friend of Boston Marathon bombing suspect Dzhokhar Tsarnaev, arrives at federal court before a hearing in Boston. Lawyers for Phillipos, a U.S. citizen who is charged with lying to investigators after last year's fatal bombing, filed a change of venue motion Monday, Sept. 22, 2014. The motion seeks to have his federal trial, scheduled to start the following week, moved from Boston to Springfield; Providence, R.I., or Portland, Maine. (AP Photo/Steven Senne, File)

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** FILE ** This file photo released Friday, April 19, 2013 by the Federal Bureau of Investigation shows Dzhokhar Tsarnaev, suspect in the Boston Marathon bombings. Lawyers for Boston Marathon bombing suspect Dzhokhar Tsarnaev are asking a judge to dismiss indictments and put proceedings in the case on hold over concerns about the jury selection process in federal court. (AP Photo/Federal Bureau of Investigation, File)