It has been 10 years since seven time Tour de France winner, Lance Armstrong, was given a lifetime ban from cycling for doping.

Journalist David Walsh dedicated 12 years of his life trying to prove that Armstrong had cheated his way to victory. The Sunday Times reporter refused to believe Lance Armstrong when he said he didn’t take performance enhancing drugs.

He has been telling his story to Matt Pintus.

(Photo: Lance Armstrong winning the 2004 Tour de France. Credit: Getty Images)