Positive test, negative result

British athlete Dwain Chambers, banned from ever taking part in the Olympic Games again following a positive drugs test, yesterday won the 60 metres sprint title at the European Indoor Athletics Championship in Turin. Today, it has been announced that Chambers will not be selected for the 4x100 metre British relay squad that will run in the World Championships in Berlin this August. At the same time, Chambers has just published his autobiography, which has not been well received by some people in and around sport. For an athlete who has tested positive in a drugs test, is there ever a way back to legitimacy? Will people always distrust you and your performances? Or are there proactive and tangible steps an athlete can take to mitigate the damages caused by such a misdemeanour?