; (2) conduct a prompt and thorough investigation of each referral from the Ombudsman, through the designees of the Ombudsman, under section 4052(e)(5)(D), and after each such investigation take appropriate disciplinary action against any United States Marshals Service employee who is found to have engaged in misconduct or to have violated United States Marshals Service policy, and notify the Ombudsman of the outcome of each such investigation