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 that means a woman helped the two suspects carry out
the attacks, according to U.S. officials briefed on the probe.
The officials familiar with the case cautioned that there could be
multiple explanations for why the DNA of someone other than the two
bombing suspects—Tamerlan Tsarnaev and his younger brother,
Dzhokhar—could have been found on remnants of the exploded devices. The
genetic material could have come, for example, from a store clerk who
handled materials used in the bombs or a stray hair that ended up in the
bomb.
On Monday, Federal Bureau of Investigation agents were seen leaving the
Rhode Island home of the parents of Katherine Russell, the widow of
Tamerlan Tsarnaev. The elder brother died after a shootout with police
four days after the April 15 bombings.
One official familiar with the case said agents went to the house Monday
to collect a DNA sample from Ms. Russell, the culmination of days of
negotiations. FBI officials also have been negotiating with Ms.
Russell's attorney in recent days to get fuller access to question her,
the officials familiar with the case said. The officials briefed on the
investigation said the DNA request was needed to determine whether it
matched the DNA found on the bomb remnants. (More at WSJ)
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