Article continues below advertisementFormer Pima County Sheriff and U.S. Surgeon General Richard Carmona has publicly accused current Sheriff Chris Nanos of "corrupting" the crime scene at the home of Nancy Guthrie, the missing 84-year-old mother of Today show co-host Savannah Guthrie.Richard's criticisms, made during an appearance on the Friday, March 27, episode of NewsNation's Brian Entin Investigates, center on procedural lapses, including Richard stating a "fundamental error" made by Sheriff Chris by personally declaring the crime scene open, a decision that typically belongs to the lead...