KINGSTON, Jamaica—Jamaica’s Olympic and world championship medallist Nesta Carter, whose positive doping test caused Usain Bolt to be stripped of his Beijing 2008 Olympic 4×100 metres relay gold, has tested positive again and faces an anti-doping hearing next week. Confirmation of the now-retired Carter’s positive test came from the Chairman of the Jamaica Anti-Doping Disciplinary Panel and the sprinter’s lawyer Stuart Stimpson. “We have a matter with Nesta Carter … We do have a disciplinary hearing that was referred to me by JADCO (Jamaica Anti-Doping Commission),” Kent Gammon told Reuters by telephone on Tuesday. Gammon, who declined to name the banned substance, said the disciplinary hearing will start on Oct. 14. Stimpson declined to provide any details on the substance or the circumstances surrounding Carter’s positive test. The latest anti-doping violation comes three years after Carter lost his appeal at the Court of Arbitration for Sport (CAS) against the International …