"Enough is enough." For me, that time is now. I have been dealing with claims that I cheated and had an unfair advantage in winning my seven Tours since 1999. Over the past three years, I have been subjected to a two-year federal criminal investigation followed by Travis Tygart's unconstitutional witch hunt. The toll this has taken on my family, and my work for our foundation and on me leads me to where I am today – finished with this nonsense.
That is Armstrong saying that he is fed up with having to prove his innocence, despite the fact that he has never failed a drugs test according to the official laws of cycling. It's supposed to be innocent until proven guilty, not the other way round.