Female DNA Found on Bomb in Boston

Investigators have found female DNA on at least one of the bombs used in the Boston Marathon attacks, though they haven’t determined whose DNA it is or whether its presence means a woman helped the two brothers suspected in the bombings, according to U.S. officials briefed on the probe.

In another development, Russian officials revealed details about contacts between the older brother and suspected Islamist radicals in the Caucasus, including Internet exchanges that led to concerns by investigators that he was trying to join up with jihadist fighters.

Related: Straight-Arrow Tamerlan Tsarnaev, a Mama’s Boy

Tsarnaev family received $100G in benefits

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