How Did Nancy Guthrie Vanish Without a Trace?

Six months after Savannah Guthrie's mother Nancy was kidnapped from her home in Tucson, Ariz., investigators have little to show beyond a trail of tragic missteps and bad luck. WSJ’s Valerie Bauerlein reports on how early errors, attention from amateur sleuths and public feuding have complicated the case. Jessica Mendoza hosts. Further Listening: - Camp Swam…