Investigators are poring over clues, seeking any overlooked information as the search for Nancy Guthrie continues. The neighborhood has seen officers going door-to-door again, even as DNA is still being processed. Savannah Guthrie has returned to New York to her husband and children, even making an appearance at her workplace. A joint task force has been established in Tucson. No one is giving up on finding Nancy Guthrie. See omnystudio.com/listener for privacy information.