The disappearance of Nancy Guthrie, the 84‑year‑old mother of NBC 'Today' co‑anchor Savannah Guthrie, has shifted from a local missing‑persons case to a closely watched national mystery. As months pass without answers, Savannah Guthrie is pouring her own resources into a privately run search, even as criticism builds over how the Pima County Sheriff's Department has handled the investigation so far.