The search to find Savannah Guthrie's missing mother, Nancy Guthrie, is "a race against time," according to Pima County Sheriff Chris Nanos. Nanos appeared during the Tuesday, February 3, broadcast of the Today show and said he hopes "that window hasn't closed" as the investigation into 84-year-old Nancy's disappearance continues. "We took some samples that we hope will have enough profile of a DNA profile that gives us some identification of what we're looking at," Nanos added, noting that it might be a few more days before any evidence comes from the samples being tested.