Ohio is shielding interviews with 20 prison employees involved in the January execution of an inmate who repeatedly gasped and snorted as he was put to death with a never-before-tried drug method.The Department of Rehabilitation and Corrections says state attorneys interviewed the employees after the January 16th execution of Dennis McGuire. The agency denied a request by The Associated Press for the interviews, saying they are protected by attorney-client privilege and constitute trial preparation records. The agency also says McGuire's family threatened a civil rights lawsuit immediately after the execution. The state's actions shed more light on Ohio's response to the execution, which included boosting lethal dosages for future procedures.