Boston Marathon Bombing Trial 2015 News: Tsarnaev Faces Death Penalty as Defense Rests Its Case

The defense panel for accused Boston Marathon bombing suspect Dzhokhar Tsarnaev rested its case on Tuesday after presenting four witnesses.

Tsarnaev is facing 30 charges with the possibility of death penalty in connection with the April 15, 2013 attack that killed three people and injured 264 people.

The prosecution, on the other hand, presented 92 witnesses in Tsarnaev's trial.

The defense and prosecution will meet on Monday for their closing statements before the jury begins deliberations.

If Tsarnaev is found guilty, the trial will go to the second phase where jurors will decide on whether Tsarnaev should face the death penalty or life imprisonment.

While Tsarnaev already admitted committing the crimes, he "left his formal 'not guilty' plea in place, meaning a jury must first convict him before taking up the question of whether to sentence him to death," Reuters reported.

His lawyers were trying to point out that his brother, 26-year-old Tamerlan Tsarnaev, was the mastermind in the bombing.

Tamerlan was the one who searched for radio transmitters and guns before the attack and that a laptop owned by Dzhokhar did not show such searches.

Questioned by prosecutors, digital forensics expert Mike Spencer revealed that Dzhokhar's laptop showed searches for "the call of jihad" four days before the attack.

He also said it was impossible to tell who between the brothers performed each Internet search and Dzhokhar sometimes logged on to Tamerlan's computer.

Tamerlan died on April 19, 2013 when Dzhokhar accidentally ran him over with a hijacked SUV after a gunfight with the police.

F.B.I. fingerprint examiner testified that she found Tamerlan's fingerprints on rolls of duct tape, caulk gun and glass jar with small nails used in making the bombs used in the Boston attack.

While Dzhokhar's fingerprints were not found, Graff explained said it is not unusual to find few fingerprints on a bomb's remains.

"Prints are usually left in the sweat or the oil that covers your fingers. They're very fragile," she said. "Due to the extreme temperatures and force in an explosion, it is not unusual to not find fingerprints on items."