Five months after Nancy Guthrie vanished from her home near Tucson in Arizona, Sheriff Chris Nanos insists the investigation is anything but dormant, saying his task force is still meeting with the FBI every single day to try to find her. The Pima County sheriff said on camera that there is still 'a lot going on with this case', even as public speculation about the fate of the 84‑year‑old mother of broadcaster Savannah Guthrie grows louder. Nano…