At least one device used in the Boston Marathon Bombing is showing traces of female DNA.

Agents removed bags of evidence from the home of suspect Tamerlan Tsarnaev's widow.

Katherine Russell has denied any involvement in the deadly attack, but DNA samples were among the evidence agents collected from her home Monday.

Her legal team has been negotiating with authorities over how much access they will have to question Russell about the attacks.

Investigators do not know if the evidence collected from the explosive can be traced back to an accomplice in the attack.

They say there could be a number of explanations as to how DNA ended up on the bombs. (Metro Networks, Inc)