Tsarnaev, 21, is charged with killing three people and injuring 264 with a pair of homemade bombs.
Repeated appeals by the alleged Boston Marathon bomber's defense team have been shot down.
Attorneys for Dzhokhar Tsarnaev argue an impartial jury could not be seated so close to the site of the attack.
Robel Phillipos and two friends removed a backpack containing empty fireworks shells from the suspected bomber's room.
As Dzhokhar Tsarnaev awaits trial for his alleged role in the Boston Marathon bombing, many of the women in his life are still proclaiming his innocence—and pushing for jihad
Tazhayakov's case has brought to light some new details about Tsarnaev himself, who will begin trial for 30 charges in November.
"We also know that the most vivid images from that day were not of smoke and chaos, but of compassion, kindness and strength."
Speakers recalled how people on the scene reacted immediately to help the wounded amid a chaotic scene