OKLAHOMA CITY — Oklahoma plans to execute a man Thursday who was convicted of kidnapping, raping and killing a 7-year-old girl in 1984.

Richard Rojem, 66, has exhausted his appeals and is scheduled to receive a three-drug lethal injection at the Oklahoma State Penitentiary in McAlester.

During a clemency hearing earlier this month, Rojem denied responsibility for killing his former stepdaughter, Layla Cummings. The child’s mutilated and partially clothed body was discovered in a field in…