Article continues below advertisementThe blood found at the entrance of Nancy Guthrie's home provides vital context for what may have happened the night of her disappearance, according to a forensic expert."Nancy Guthrie is bleeding from some area, either the hands or the face," forensic pathologist Dr. Michael Baden suggested, a news outlet reported on Thursday, February 12. "The nature of the blood spots with little pale centers or donut shapes is typical for drops that come from the nose or mouth, because they're mixed with air.