The ban is backdated to last June , which means Simpson would be able to return to competition this December . Olympic sprint gold medalist Asafa Powell is to appeal her doping suspension . Simpson 's agent Asafa Powell calls the 18-month ban `` incredibly unjust '' Simpson tested positive for banned stimulant oxilofrine at Thursday Jamaican trials . A ruling in the case of fellow Jamaican sprinter Simpson is expected on Thursday .
Olympic sprint gold medalist Asafa Powell is to appeal her doping suspension . Simpson 's agent Asafa Powell calls the 18-month ban `` incredibly unjust '' Simpson tested positive for banned stimulant oxilofrine at Thursday Jamaican trials . A ruling in the case of fellow Jamaican sprinter Simpson is expected on Thursday .