In this Friday, April 19, 2013, Massachusetts State Police file photo, 19-year-old Boston Marathon bombing suspect Dzhokhar Tsarnaev, bloody and disheveled with the red dot of a sniper's rifle laser sight on his head, emerges from a boat at the time of his capture by law enforcement authorities in Watertown, Mass. On Thursday, Jan. 30, 2014, U.S. Attorney General Eric Holder authorized the government to seek the death penalty in the case against Tsarnaev. (AP Photo/Massachusetts State Police, Sean Murphy, File)
** FILE ** In this Friday, April 19, 2013, photo provided by the Massachusetts State Police, Boston Marathon bombing suspect Dzhokhar Tsarnaev lifts his shirt while standing in a boat at the time of his capture by law enforcement authorities in Watertown, Mass. (AP Photo/Massachusetts State Police, Sean Murphy)
** FILE ** Massachusetts State Police Sgt. Sean Murphy, right, a tactical photographer, and his son Connor Patrick Murphy, arrive at State Police Headquarters for his hearing to determine his duty status after he released images of the arrest of the Boston Marathon bombing suspect, in Framingham, Mass., Tuesday, July 23, 2013. (AP Photo/The Boston Herald, Ted Fitzgerald)
Boston police Commissioner Ed Davis (at podium), accompanied by Massachusetts State Police Col. Timothy Alben (second from right) and Gov. Deval Patrick (right), speaks during a news conference after the arrest of 19-year-old Dzhokhar Tsarnaev, a suspect of the Boston Marathon bombings, in Watertown, Mass., on Friday, April 19, 2013. (AP Photo/Matt Rourke)