[Warning: Potentially Triggering Content] The disappearance of Nancy Guthrie, the 84-year-old mother of TODAY show host Savannah Guthrie, has taken another somber turn as investigators continue to retrace her final known movements in Tucson, Arizona. At a press conference on Thursday, Pima County Sheriff Chris Nanos confirmed detectives have interviewed the Uber driver who transported Nancy to a family dinner the night before she vanished.