Paris - The head of the US Anti-Doping Agency wants Lance Armstrong to come forward with information detailing the alleged complicity of cycling's governing body in his doping.
Travis Tygart appeared at a Senate hearing in Paris on Thursday on ways to improve the fight against doping.
USADA'S scathing report exposing systematic doping by Armstrong and his teams led to the American rider being stripped of his seven Tour de France titles and banned from elite sport for life.
Cycling body UCI has been accused of covering up suspicious samples from Armstrong, accepting financial donations from him and helping him avoid detection in doping tests.
During the Senate hearing, Tygart said he had "evidence of the UCI's involvement in this affair" and Armstrong could hold the key to revealing the extent of that.
Tygart told The Associated Press that "Armstrong led us to believe - during the course of our interaction with him - that he had evidence of their complicity in this situation."
Travis Tygart appeared at a Senate hearing in Paris on Thursday on ways to improve the fight against doping.
USADA'S scathing report exposing systematic doping by Armstrong and his teams led to the American rider being stripped of his seven Tour de France titles and banned from elite sport for life.
Cycling body UCI has been accused of covering up suspicious samples from Armstrong, accepting financial donations from him and helping him avoid detection in doping tests.
During the Senate hearing, Tygart said he had "evidence of the UCI's involvement in this affair" and Armstrong could hold the key to revealing the extent of that.
Tygart told The Associated Press that "Armstrong led us to believe - during the course of our interaction with him - that he had evidence of their complicity in this situation."