If LA was ahead of the game all the time there is no way he was going to get caught when he won, and if his doctor was better than the other guy's then you have another factor. I doubt they will find the truth ever and just like alcapone, he might get punish for a another thing, not for the drug use. Probably i was right time ago when i mentioned that he retired only to clean himself (in every aspect.)
Regarding doping you have low profile guys and abusers, the abusers always get caught. I remember in the panams 87 or something like that, a brazilian cyclist heard that injecting himself hormones he was going to get stronger and stuff, and that it was undetectable. So guess what, the moron went and got estrogen!!!, guess now the PAIN symptoms he started to feel 1 day before the Gran Fondo race.
He changed his name to XUXA after this! hahahahaha