Former FBI agents raise a chilling elder abuse theory as investigators search for Savannah Guthrie's missing mother, Nancy.

Nancy Guthrie disappearance case crucial update from former FBI agent suggests investigators may be closer to solving the mystery. Former FBI officials, forensic experts, and legal analysts have raised questions about DNA evidence,

Former FBI agent Maureen O'Connell believes missing Arizona pensioner Nancy Guthrie was 'wrapped up' and carried out of her home, based on blood spatter found on her porch and driveway.

Officials confirm crime in disappearance of Savannah Guthrie's 84-year-old mother Nancy, who went missing on Feb. 1 from her Tucson home, according to authorities.