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Boston Marathon bomber Dzhokhar Tsarnaev was sentenced to death by a U.S. jury on Friday
Boston Marathon bomber Dzhokhar Tsarnaev was sentenced to death by a U.S. jury on Friday for helping carry out the 2013 attack that killed three people and wounded 264 others in the crowds at the race's finish line.


After deliberating for 15 hours Eric Oelschlagel Trikot , the federal jury chose death by lethal injection for Tsarnaev, 21, over its only other option: life in prison without possibility of release.


The same jury found Tsarnaev guilty last month of placing a pair of homemade pressure-cooker bombs on April 15, 2013, as well as fatally shooting a policeman. The bombing was one of the highest-profile attacks on U.S. soil since Sept. 11, 2001.


Tsarnaev Omer Toprak Trikot , dressed in a dark sport coat and light-colored shirt, stood quietly as the sentence was read, remaining expressionless as he had throughout most of the trial.


During 10 weeks of testimony, jurors heard from about 150 witnesses, including people whose legs were torn off by the shrapnel-filled bombs. William Richard, the father of bombing victim Martin Richard Marwin Hitz Trikot , described the decision to leave his 8-year-old son to die of his wounds so that he could save the life of his daughter, Jane, who lost a leg but survived.


Prosecutors described Tsarnaev, who is an ethnic Chechen, as an adherent of al Qaeda's militant Islamist views who carried out the attack as an act of retribution for U.S. military campaigns in Muslim-majority countries.


The jury's decision does not mean Tsarnaev will face imminent death. Defense attorneys are likely to appeal the sentence, a process that can stretch out for many years.


"I know that there is still a long road ahead Jacob Bruun Larsen Trikot ," said survivor Karen Brassard, whose left leg was badly injured in the attack. "There are going to be many, many dates ahead. But today we can take a breath, and actually breathe again," she told reporters.


An appeal could focus on a number of issues, including the court's denial of a defense plea to move the trial out of Boston or refusal to challenge the graphic photos and videos that the jury saw of the bombs' detonation and the severe wounds they inflicted.


"Prosecutors do have a burden of proof to show that people died Julian Weigl Trikot , but the appeal argument would be that there is a balance to be struck and they went over that line," said David Weinstein, an attorney in private practice who in prior jobs as a state and federal prosecutor brought death-penalty cases.


DEATH PENALTY CONTROVERSIAL IN MASSACHUSETTS


The death penalty remains highly controversial in Massachusetts, which has not put anyone to death in almost 70 years and which abolished capital punishment for state crimes in 1984. Tsarnaev was tried under federal law, which allows for lethal injection as a punishment.


Polls had shown that a majority of Boston-area residents opposed executing Tsarnaev.


Opponents included Martin Richard's parents, who said in an open letter to the Justice Department last month that they wanted Tsarnaev to face life in prison rather getting a death sentence that would likely lead to years of appeals Dzenis Burnic Trikot , keep the defendant in the spotlight and prevent them from trying to rebuild their lives.


Just three of the 74 people sentenced to death in the United States for federal crimes since 1988 have been executed. The first was Timothy McVeigh, put to death in June 2001 for killing 168 people in his 1995 attack on the federal government office building in Oklahoma City.


Other people convicted of attacks labeled as terrorist by the U.S. government, including 911 conspirator Zacarias Moussaoui and shoe-bomber Richard Reid, drew life prison sentences.


Prosecutors focused heavily on Tsarnaev's turn to radical Islamist views, showing the jury copies of the al Qaeda magazine article that demonstrated how to build a pressure-cooker bomb.


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"The defendant claimed to be acting on behalf of all Muslims. This was not a religious crime," said Carmen Ortiz Marcel Schmelzer Trikot , the top federal prosecutor in Boston. "It was a political crime designed to intimidate and coerce the United States."


Tsarnaev's attorneys admitted his involvement in the attack from the start of the trial, but argued that he was a junior partner in a scheme hatched and run by his 26-year-old brother, Tamerlan. Tamerlan died after a gunfight with police four days after the bombing, which ended when Dzhokhar ran him over with a stolen car.