When Andrus Veerpalu tested positive for recombinant human grown hormone in both his A and B samples in the winter of 2011, FIS used a peer-reviewed, reliable test to detect the abnormalities and seemed to have a slam-dunk case. In a highly unusual appeals case that surprised scientists and anti-doping administrators alike, the Court of Arbitration for Sport found that WADA had made missteps in setting detection limits. Here's how Veerpalu won a case even though CAS was sure he was guilty.