Rega rdless of whether or not Armstrong himself doped the fact that his past teammates have come out and admitted their guilt means that he benefited from performance enhancing drugs when winning his titles. You can't win the Tour without good domestiques, and his were on EPO. Here's an article that goes into this in more detail: http://youkantbeseri ous.com/2012/06/14/i t-doesnt-matter-whet her-or-not-he-doped- armstrong-should-los e-his-titles/