The decision was made by a three-judge panel of the 1st U.S. Circuit Court of Appeals after they concluded that the judge who oversaw the case did not properly screen jurors for biases. Mr. Tsarnaev's brother died later that night after a gunfight with police, which ended when Mr. Dzhokhar ran him over with a stolen auto. "Dzhokhar will spend his remaining days locked up in prison, with the only matter remaining being whether he will die by execution". Tsarnaev was convicted on 30 charges, which include conspiracy and the use of a weapon of mass destruction.
Haslet, 40, a dancer who lost a leg in the attack, was one of 17 people left without at least one limb as a result of blasts set off by bombs that Tsarnaev and his brother, Tamerlan Tsarnaev, planted as a crowd gathered near the finish line one of America's most famous running events.
Donohue's wife, Kim, wrote the decision doesn't change the couple's happiness or bring back their friend, MIT Police Officer Sean Collier, who was fatally shot by the Tsarnaev brothers three days after the bombings as they attempted to leave the Boston area.
Tsarnaev, who is now 27, is being held at the high-security supermax federal prison near Florence, Colo.More news: Young Kids Could Spread COVID-19 as Much as Older Children, Adults
Thompson said the pervasive news coverage of the bombings and their aftermath featured "bone-chilling" photos and videos of Tsarnaev and his brother carrying backpacks at the marathon and of those injured and killed near its finish line.
One post after Tsarnaev's capture called him a 'piece of garbage'.
On the day of Tsarnaev's sentencing, the juror changed her Facebook profile picture to an image that said "BOSTON STRONG", a rallying cry used in the wake of the bombing, the attorneys said.
Tsarnaev's lawyers pushed several times to move the trial out of the city where the bombs exploded, arguing the intense media scrutiny and number of people touched by the attack in Boston would taint the jury pool.More news: Joe Biden nears final decision on running mate
The higher court noted that the judge who presided over Tsarnaev's trial had rejected the defense team's request for a more distant trial venue where prospective jurors might be less likely to be prejudiced against the Chechen immigrant.
"But despite a diligent effort, the judge here did not meet the standard set by Patriarca and its successors".
The three judges who issued the decision were: Juan Torruella, a Reagan appointee who dissented in part; Rogeriee Thompson, an Obama appointee who wrote the opinion; and William Kayatta, who is also an Obama appointee.
US President Donald Trump weighed in on the ruling during an address to supporters on the tarmac of Tampa International Airport. "So they'll argue about that for a long time".More news: City set to sign Dutch defender
"I am sorry for the lives I have taken, for the suffering that I have caused you, for the damage I have done, irreparable damage", Mr. Tsarnaev said.