Landis' B sample came back positive for a high ratio (11:1) of testosterone to epitestosterone. It also tested positive for exogenous testosterone. Landis claims he is innocent. I believe him.
One question at hand is the definition of guilt. To be guilty, in my opinion, he would of knowingly taken exogenous testosterone. Another definition of guilt would be if the sample is positive, period. So this is where to conspiracy theories start. Let's look at some facts.
- The Tour de France has been won 8 consectitive times by American riders which irritates some French Tour organizers
- Landis held the yellow jersey for three stages prior to his stage 17 performance and tested clean for all those stages
- Landis uses a PowerTap rear hub that monitors average, peak and total power output in wattage throughout the stage
- Landis had an unusually low power output on stage 16 of the Tour when he lost over 10 minutes to the stage winner
- Landis had an average power output day (his usual wattage numbers for a stage with climbing) on stage 17 of the Tour when he finished 5 minutes ahead of all other riders
- Two of the Tour's top high profile climbers (Ulrich and Basso) were pulled from the Tour prior to the start
- Exogenous testosterone can be consumed orally, by intramuscular injection, or transdermally
- The UCI policy uses the ratio of testosterone to epitestosterone, not the absolute values
- Landis also drank a significant amount of alcohol after his stage 16 performance
- Exogenous testosterone is made from plant sterols (soy)
In my opinion, the next step would be to take both samples and test them in several independent laboratories across the globe. The UCI labs are in Paris, France. Let the US Antidoping Agency test the samples.