Authorities have new intelligence and leads to follow in the case of Savannah Guthrie's missing mother, Nancy Guthrie, signaling what could be a major step forward in the search. "I think that investigators are definitely closer," Pima County Sheriff Chris Nanos told NBC's Liz Kreutz during a Today show interview that aired on Tuesday, March 3. "Now it's time to just go to work." Nanos said they are reviewing footage of a car spotted driving by on the night of 84-year-old Nancy's disappearance. "We're aware of it and we're looking into it. Just like any other piece of evidence," he said.