This undated forensics photograph made by the FBI, released Tuesday, March 24, 2015, by the U.S. Attorney's office and presented as evidence during the federal death penalty trial of Dzhokhar Tsarnaev in Boston, shows the scene of the April 19, 2013, gun battle in Watertown, Mass., between police and Dzhokhar and Tamerlan Tsarnaev. Dzhokhar Tsarnaev is charged with conspiring with his brother to place two bombs near the Boston Marathon finish line that killed three and injured more than 260 spectators in April 2013. Tamerlan died after he was wounded during the gun battle and run over by Dzhokhar as he escaped. (AP Photo/U.S. Attorney's Office) Photo: AP / U.S. Attorney's Office