Search for Nancy Guthrie enters 11th day with new leads and FBI activity

The search for 84-year-old Nancy Guthrie, missing since February 1, continues with FBI agents focusing on roadways near her Tucson home. Carlos Palazalos, a delivery driver, was detained and questioned, then released, in connection with her disappearance, though he claims innocence and uncertainty about knowing Guthrie. A former FBI special agent indicated there was probable cause for the search of Palazalos' car and home. Despite numerous leads, no arrests have been made, but the investigation, now in its 11th day, has generated significant tips.