India, Feb. 7 -- The frantic search for 84-year-old Nancy Guthrie, mother of Today show host Savannah Guthrie, has entered its sixth day. She went missing early Sunday from her home just outside Tucson, Arizona.

Pima County Sheriff Chris Nanos said Thursday that authorities believe Nancy was taken against her will. DNA tests confirmed that blood found on her front porch matched hers. So far, investigators have not identified any suspects or ruled anyone out.

Sources close to the Pima County Sheriff's Department told the Daily Mail that critical missteps in the early hours of the search may have hampered the investigation. According to the insiders, the handling of the crime scene and conflicting public statements slowed the initial resp...