Frank Schleck has left the tour after a positive test for a banned dieretic. Ahhhhh won't they learn!
Its simple really...
He doesn't know how it got into his body, suspects poisoning.
Much like Contador could not explain the clenbuterol, and suspected food contamination.
The punishment should be equally applied - i.e. if the substance exists in the system, and no alternate explanation can be proven, then a punishment should apply.
Is it really such a surprise? Frank has already been found out paying thousands of euros to a doctor associated with doping, with no real excuse or investigation. A bit hard for one of the golden boys to be swept under the rug now when in the spotlight of the biggest bike race on earth.
You sceptic you. Shame. Next you'll be talking about Cancellara's little motor in the seat tube :)