Five months into Nancy Guthrie's disappearance, the Pima County Sheriff's office faces mounting criticism over its handling of the case, including accusations of delayed FBI involvement, mishandled evidence, and poor communication with the public.The United Cajun Navy, credited with thousands of rescues during Hurricane Katrina and other natural disasters, submitted a detailed plan to help search for Guthrie months ago, but the sheriff repeatedly declined.United Cajun Navy Vice President Brian T