Tsarnaev's lawyers, in a brief filed in the 1st U.S. District Court of Appeals, claim their client could not have received a fair trial in Boston, where reports about the bombing saturated the news.
"This case should not have been tried in Boston," the attorneys wrote, according to The Associated Press.
The attorneys are arguing that the case should have been moved out of the city, as it was "traumatized by the bombings, ordered to shelter in place during the manhunt, saturated by prejudicial publicity and united in the Boston Strong movement," the AP reported.
Tsarnaev in 2015 was sentenced to death for his role in the Boston Marathon bombing two years earlier. He was found guilty on all 30 charges in the bombing and its aftermath by the same jury earlier in 2015.
The jury had to unanimously agree for him to receive the death sentence.
His lawyers are claiming that the Boston jury that sentenced him must have been inundated with “heart-wrenching stories about the homicide victims, the wounded and their families,” Reuters reported.