The trial of a third friend of Boston Marathon bombing suspect Dzhokhar Tsarnaev (joh-HAHR' tsahr-NEYE'-ehv) has ended in another conviction.

But some legal observers say the amount of time the jury spent deliberating and its somewhat mixed verdict could help federal prosecutors argue against any new defense bid to move Tsarnaev's trial outside of Boston.

Robel Phillipos was convicted Tuesday of lying to the FBI about being present in Tsarnaev's dorm room when two other friends removed a backpack containing fireworks and other potentially incriminating evidence.

The jury deliberated for more than 35 hours over six days before finding Phillipos not guilty of telling four of the nine lies he was accused of by prosecutors.