A former Bureau of Prisons supervisor, Kevin X. Pearce, 39, was sentenced yesterday to 66 months in prison followed by one year of supervised release for leading two cover-ups of assaults of inmates held at U.S. Penitentiary Big Sandy. Pearce was convicted after a six-day trial. His co-defendants, former corrections officers Samuel Patrick and Clinton Pauley, previously pleaded guilty and were respectively sentenced to 36 and 40 months in prison. “As a supervisor, this defendant was responsible for safeguarding the rights of thousands of inmates, but he abused his authority by leading cover-ups of two violent assaults of inmates in his custody,” said Assistant Attorney General Kristen Clarke of the Justice Department’s Civil Rights Division. “The Justice Department will continue to hold accountable law enforcement officials who violate federal civil rights laws or who cover up violations. We will protect the rights of all people, including those held inside our jails an