By Evan Garcia and Steve Gorman TUCSON, Arizona, Feb 5 (Reuters) – Investigators in Arizona presume the kidnapped elderly mother of popular ‌U.S. ​television news host Savannah Guthrie is “still out there” and alive four ‌days after she was abducted from her home, though no suspect has been identified, authorities said on Thursday. Police and FBI officials said they had intensified their ​search for Nancy Guthrie, 84, calling in extra personnel and special forensic analysts, even as the first of two deadlines set in a ransom note came and went early Thursday evening. Nancy Guthrie was last seen on January 31 when she ‍was dropped off at her residence near Tucson by family members ​after having dinner with them, and relatives reported her missing around noon the following day, according to authorities. Because her mobility is extremely limited, she could not have left her home unassisted, leading investigators to conclude early on that she ​was the victim of a ⁠kidnapping. Revealing new details from the investigation at a press conference on Thursday, Pima County Sheriff …