Article Photos: Oklahoma State Reformatory

Dale Cantrell, a disciplinary hearing officer, closes the door to the death chamber on H Unit at the Oklahoma State Penitentiary in McAlester, Okla., Wednesday, Dec. 7, 2011. Photo by Nate Billings, The Oklahoman

Dale Cantrell, a disciplinary hearing officer, closes the door to the death chamber on H Unit at the Oklahoma State Penitentiary in McAlester, Okla., Wednesday, Dec. 7, 2011. Photo by Nate Billings, The Oklahoman