What evidence does the USADA have against Armstrong? From what I read it's just a bunch of cyclists who are willing to come forward to testify against him and a couple of inconclusive positive results for blood doping. Where is the cold hard evidence? All of it is circumstantial evidence, which admittedly is quite persuasive but nonetheless is circumstantial. Anti-doping detection tech must surely have advanced to a point where the labs should be able to detect if Amstrong's test samples are tainted. Afterall, his 7 tour de France victories took place quite some time back.