Columbus, Ohio (AP) -- A federal judge has delayed the October execution of a death row inmate who joined a lawsuit challenging lethal injection as unconstitutional cruel and unusual punishment. Romell Broom, who raped and stabbed to death a 14-year-old girl, is one of 15 Ohio inmates claiming the procedure may cause prisoners to suffer. U.S. District Judge Gregory Frost on Sept. 5 ordered Broom's Oct. 18 execution halted while the lawsuit proceeds. Another death row inmate asked Frost on Friday for permission to join the lawsuit. Michael Turner, 48, killed his estranged wife and her boyfriend at her apartment...