Former Pima County sheriff Richard Carmona said on Friday that the Nancy Guthrie crime scene outside Tucson, Arizona, was compromised after a Domino's delivery driver approached the house during the investigation, intensifying scrutiny of Sheriff Chris Nanos amid a no-confidence revolt and mounting political pressure.
Nancy, 84, was last seen on 31 January and reported missing on 1 February. Authorities said she was believed to have been forcibly taken from her home, where drops of blood were found on the front porch.
