“Pima County Sheriff Chris Nanos has 'locked down' the Nancy Guthrie investigation amid escalating tensions between his team and the FBI that have reached the boiling point, the Daily Mail can reveal. Several sources say that Nanos is now insisting that only he and two of his highest-ranking inner circle will make decisions regarding the case of the missing 84-year-old. Several PCSD sources confirmed to the Daily Mail that just three decision makers are leading the department's investigation: Sheriff Nanos, Chief Jesus Lopez and Captain Juan Carlos Navarro.”