PARIS (AP) - The head of the U.S. 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 to discuss ways to improve the fight against doping.
USADA'S scathing report on systematic doping by Armstrong and his teams led to the stripping of his seven Tour de France titles and being 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."
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."