Pima County Sheriff Chris Nanos has said investigators are closing in on identifying whose blood was found outside missing Arizona woman Nancy Guthrie's Tucson home, telling People that fresh DNA work in the case has produced an 'unknown' profile that forensics specialists are now trying to match.
Guthrie vanished from her home in late January, setting off a frantic search that quickly spread across Tucson and beyond. Days after she was reported missing, images of detectives examining her front porch circulated widely, alongside a short clip appearing to show blood outside the door. That trail has now become the most concrete clue in a case that has othe
