After spending 14 hours deliberating, jurors in the Boston Marathon bomber sentencing trial sentenced the convicted terrorist to death on Friday.

Last month, Dzhokhar Tsarnaev was found guilty of 30 charges for his role in the 2013 Boston Marathon bombings, including conspiracy to use a weapon of mass destruction and bombing a public place. Seventeen of those charges carried the possibility of the death penalty.

According to NPR, the jury sentenced Tsarnaev to die on counts 4, 5, 9, 10, 14 and 15.

Following the verdict, newly instated Attorney General Loretta Lynch released a statement supporting the jury's death sentence for the 21-year-old bomber.

"Dzhokhar Tsarnaev coldly and callously perpetrated a terrorist attack that injured hundreds of Americans and ultimately took the lives of three individuals," read the statement.

"The ultimate penalty is a fitting punishment for this horrific crime and we hope that the completion of this prosecution will bring some measure of closure to the victims and their families," it continued. "We thank the jurors for their service."

During the four-month trial, the defense team argued that Tsarnaev participated in the attack -- which killed three people and injured more than 260 others on April 15, 2013 -- because he was under the influence of his older brother, Tamerlan. The defense also portrayed Tsarnaev as a normal and impressionable teenager who was a pawn in his brother's radical scheme.

However, during their closing arguments, prosecutors countered that narrative, telling jurors that the young defendant lacks remorse for his action and deserves "a sentence of death," reports The Boston Herald.

Prosecutor Steve Mellin said it was Tsarnaev's goal to cause his victims as much physical pain as possible in order to make a political statement.

"The bombs burned their skin, shattered their bones and ripped their flesh," Mellin said. The bombing "disfigured their bodies, twisted their limbs and punched gaping holes into their legs and torsos."

Tsarnaev's case will now be automatically appealed to a higher federal court. As a result, this will begin a long appeal process that may take years to resolve, notes Boston.com.