It seems clear that Dzhokhar Tsarnaev exploded bombs at the Boston Marathon. Although some wanted him tried as an enemy combatant outside of the requirements of the Constitution, the Obama Administration has brought charges in the federal courts.
U.S. officials are saying Tamerlan Tsarnaev’s name was added to a U.S. government terrorism database about 18 months before the Boston Marathon bombings.
In the fall of 2011, Russia contacted the CIA with concerns about Tamerlan Tsarnaev. Two officials say the CIA added Tsnaraev's name to a terrorism database and that the FBI conducted an investigation but did not find he had any terror connections.
On Wednesday, U.S. officials also said that the pressure-cooker bombs the Tsarnaev brothers used were triggered by a remote detonator of the kind used in remote-control toys.
Family members of Boston Marathon bombing suspect Tamerlan Tsarnaev say he had fallen under the influence of a Muslim convert, steering him toward a strict strain of Islam.
His family says that, under the tutelage of a friend known to the Tsarnaev family only as Misha, Tamerlan gave up boxing and stopped studying music. He began opposing the wars in Afghanistan and Iraq and turned to websites and literature claiming that the CIA was behind the terrorist attacks of Sept. 11, 2001, and that Jews controlled the world.