Through his criminal defense attorneys, Boston Marathon bomber Dzhokhar Tsarnaev submitted an appeal on Friday against his murder convictions and other criminal convictions. The appeal was filed just two weeks after a judge shot down his legal team's request for a retrial. The appeal documents were submitted to the U.S. Court of Appeals for the First Circuit Court located in Boston, Massachusetts.

In the notice of appeal, Tsarnaev is asking for his death sentence to be overturned. The lawyers are also asking that the 22-year-old convict not be required to pay over $101 million in restitution to victims, which he was ordered to do in his court proceedings. Tsarnaev was convicted last year for his involvement in the 2013 Boston Marathon bombing, which he carried out with his now-deceased brother.

Legal Basis for Appeal Has Not Been Clarified

Tsarnaev's attorneys have not detailed the legal basis for their request for overturning Tsarnaev's punishments and convictions. However, they previously argued that Tsarnaev was at a disadvantage in his legal proceedings because it was impossible to find an impartial jury in the Boston area due to the widespread media coverage of the bombing.

Three people were killed and over 260 more were injured in the Boston Marathon attack. According to prosecutors, Tsarnaev completed the bombing with his brother, Tamerlan Tsarnaev, who died several days after the incident when he was fatally shot in a police shoot-out.

Could Be Decades Before Tsarnaev Is Executed

Tsarnaev is currently being held in a high-security prison facility in Florence, Colorado. Some believe that the legal battle over his murder convictions and death sentence could take decades to resolve. In fact, it is rare that death sentences are carried out for federally convicted individuals. Seventy-four people have received federal death sentences since 1998, but only three of them have been executed.