[Warning: Potentially Triggering Content] New video circulating online has cast a devastating shadow over the search for Nancy Guthrie, the 84-year-old mother of TODAY show anchor Savannah Guthrie, who vanished from her Arizona home over the weekend. And what investigators are now confronting is deeply unsettling. Footage shared by NewsNation senior correspondent Brian Entin on Tuesday shows what appears to be dark blood splattered across the brown tile outside Nancy's front door. The marks form a trail that leads away from the entrance, a visual that is impossible to shake once you see it.