Missouri -- Thanks to a drop of blood, police believe they've solved a violent crime that occurred more than eight years ago in Clayton, bnd.com reports.
And now, a 38-year-old St. Louis man faces charges for robbing and sexually assaulting a woman in 1999.
Police say the woman was talking on the phone when she was grabbed from behind. Wearing a pillowcase over his head, the assailant tried to sexually assault her.
Fighting back, she bit the suspect so hard it drew blood. That turned out to be vital to the case.
Late 2006, the blood sample was entered into a DNA index system - something which eventually led police to the suspect, who was on probation for another crime.
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