Breaking: Boston marathon bomber found guilty.

In the US Boston marathon bomber Dzhokhar Tsarnaev has been found guilty.

A federal US jury has found Dzhokhar Tsarnaev – the surviving brother behind the Boston Marathon bombings, guilty of 30 charges in relation to the Boston bombings – all which carry the death penalty.

The bombings in April 2013 killed three people and injured more than 260.

Jurors found Dzhokhar Tsarnaev guilty of all 30 counts, including – conspiracy to use a weapon of mass destruction resulting in death, using a weapon of mass destruction resulting in death, and aiding and abetting, conspiracy to bomb a public place, and bombing a public place.

The jury determined that he was responsible for the deaths of Krystle Campbell, 8-year old Martin Richard, Lingzi Lu and Sean Collier.

CBS News reports that Tsarnaev stood with his head bowed and his hands clasped. The families of the victims who were in court were silent, some sitting on the edge of their seats.

He was found guilty on all 30 charges against him.

The jury deliberated for 11½ hours before reaching the verdict overnight, hearing from 96 witnesses.

During the trial Assistant U.S. Attorney Aloke Chakravarty said.”The defendant brought terrorism into the backyards and main streets,”

 “The defendant thought that his values were more important than the people around him. He wanted to awake the mujahedeen, the holy warriors, so he chose Patriots’ Day, Marathon Monday,”

21-year old Tsarnaev tried to convince jurors that his older brother was responsible with defense attorney Judy Clarke saying 26-year-old Tamerlan Tsarnaev, who died in a shootout with police days after the terror attack, was the instigator of the marathon plot.

The younger brother Clarke said, was only following Tamerlan Tsarnaev.

“If not for Tamerlan, it would not have happened,” Clarke argued.

Victim Jeff Bauman, who lost both legs in the explosions wrote on Facebook.

The jury will now begin hearing evidence on whether Tsarnaev should get life in prison or a death sentence.

The Boston Globe reports that defence lawyers will try to further paintTsarnaev as a victim of his brother’s radicalisation in arguing for a lesser sentence than death.

“The defense may also cite what are known as “mitigating” factors: Tsarnaev has no prior criminal record; he was a lesser participant; and they may cite his upbringing as the youngest of four children in an immigrant family facing a difficult adjustment to American life.”

For the death penalty, the jury must reach a unanimous decision.

If a jury is not unanimous in that decision, the judge will hand out a sentence of life imprisonment.