Drug tests and Organic copyright facts delivered scientific proof of Armstrong's doping. Retrospective Evaluation of saved urine samples through the 1999 Tour de France revealed traces of EPO. 3 times later, Armstrong, while publicly sustaining his innocence, chose to not formally challenge the USADA allegations. In an announcement, he said https://abcnews.go.com/US/lance-armstrong-doping-investigation-widens/story?id=13663557