Wait, this isn't his first foray into the doping scene, is it? I seem to recall one or two or a dozen other stories like this (Merneith, Gamine and the aptly-named Charlatan come to mind.) Each one taking place after he had already been caught before. I believe there is ample evidence that he is, in fact, stupid. Criminals aren't known for their immense ability to stop themselves from committing crimes, especially when they repeatedly get away with it.