Former USADA . He handed me a zip lock bag full of pills and vials . Court of Arbitration for Sport rider Lance Armstrong claims there was a culture of doping . Mercier says he was offered steroids by team doctor Pedro Celaya in 1997 . Celeya denies the accusations and will challenge U.S at Court of Arbitration for Sport . Former teammates of Mercier have testified against the famous cyclist .
Former USADA . Court of Arbitration for Sport rider Lance Armstrong claims there was a culture of doping . Mercier says he was offered steroids by team doctor Pedro Celaya in 1997 . Celeya denies the accusations and will challenge U.S at Court of Arbitration for Sport . Former teammates of Mercier have testified against the famous cyclist .