TUCSON, Ariz. — Investigators in the Nancy Guthrie abduction case have obtained a significant DNA breakthrough that has narrowed the pool of potential suspects, Pima County Sheriff Chris Nanos announced Saturday, offering the most encouraging update yet as the search for the 84-year-old mother of NBC "Today" show co-anchor Savannah Guthrie entered its 110th day.
Nancy Guthrie Update: Genetic Genealogy Results Represent Most Tangible Advancement
