Katherine Russell DNA, Fingerprints Do Not Match Fragments Of Boston Marathon Bomb: Report

Marathon Bomb DNA, Fingerprints Do Not Match Dead Suspect's Widow

DNA and fingerprints found on explosive fragments at the scene of the Boston Marathon bombing do not match those of the elder terror suspect's wife, CBS reports.

Katherine Russell, the widow of Tamerlan Tsarnaev, initially came under scrutiny when authorities discovered female DNA on a piece of pressure cooker used to construct a homemade bomb. As a result, the 24-year-old woman submitted to a DNA test.

The New York Times also reported, based on the accounts of two law enforcement officials, that Russell's DNA and fingerprints did not match the sample found on the explosive debris.

John Miller, a former assistant FBI director, told "CBS This Morning" that Russell remains integral to the ongoing investigation:

What continues to puzzle the FBI about Russell is what she knew and when, if anything, Miller said. "What they really want to know from her is, you know, here's a woman who dated Tamerlan, who converted to Islam after they were married, who ... lived in the same apartment -- not a big apartment -- where bombs were being constructed and pressure cookers were being bought two or three at a time," Miller said. "They want to know, 'Is it possible all of this was going on concealed from you or did you know it the whole time?'"

After cooperating with authorities through the early stages of the investigation, Russell now only communicates with investigators through her attorneys.

On Thursday, reports surfaced claiming that the Tamerlan and his brother, Dzhokhar Tsarnaev, 19, considered suicide attacks and striking on the Fourth of July. Dzhokar is currently in custody.

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