After the first blast, a block away from Dzhokhar, “virtually every head turns to the east ... and stares in that direction in apparent bewilderment and alarm,” the complaint says. Dzhokhar Tsarnaev, “virtually alone of the individuals in front of the restaurant, appears calm.”
He then quickly walked away, leaving a knapsack on the ground; about 10 seconds later, a bomb blew up at the spot where he had been standing, the FBI said.
The FBI did not say whether he was using his cellphone to detonate one or both of the bombs or whether he was talking to someone.
The criminal complaint shed no light on the motive for the attack.
The Obama administration said it had no choice but to prosecute Dzhokhar Tsarnaev in the federal court system. Some politicians had suggested he be tried as an enemy combatant in front of a military tribunal, where defendants are denied some of the usual constitutional protections.
But Tsarnaev is a naturalized U.S. citizen, and under U.S. law, American citizens cannot be tried by military tribunals, White House spokesman Jay Carney said. Carney said that since 9/11, the federal court system has been used to convict and imprison hundreds of terrorists.
Shortly after the charges were unveiled, Boston-area residents and many of their well-wishers — including President Barack Obama at the White House — observed a moment of silence at 2:49 p.m. — the moment a week earlier when the bombs exploded.
Across Massachusetts, the silence was broken by the tolling of church bells.
“God bless the people of Massachusetts,” said Gov. Deval Patrick at a ceremony outside the Statehouse. “Boston Strong.”
Also yesterday, the governor and Roman Catholic Cardinal Sean O’Malley were among the mourners at St. Joseph Church at the first funeral for one of the victims, Krystle Campbell. The 29-year-old restaurant manager had gone to watch a friend finish the race.