Jamie McCoskey, 49, became the 15th convicted killer executed this year in Texas, which carries out the death penalty more than any other state, the Associated Press reports. He was convicted of abducting a young couple, raping the woman and fatally stabbing the man in 1991. McCoskey was on probation when he committed the crimes. Before reaching death row, he was convicted of kidnapping and assaults in prison, including using a chisel to crack the skull of a fellow inmate. He was remembered for walking into a courtroom the day after his capital murder conviction in 1992, grabbing a heavy oak chair and heaving it 10 feet, hitting a prosecutor. At least seven other Texas prisoners are set to die in the coming months, including one next month.