A former US Anti-Doping Agency chief has said a representative of drugs-cheat cyclist Lance Armstrong offered a donation in the range of 200,000 to 250,000 dollars in 2004.
Terry Madden, who led USADA from 2000-07, corroborated a story current chief executive Travis Tygart told in an interview earlier this month and said the agency immediately rejected the offer.
In his interview with TV mogul Oprah Winfrey yesterday, Armstrong, 41, said no-one in his camp made such an offer.
"Nobody," Armstrong said. "Certainly I had no knowledge of that. But I've asked around. Did anybody? Not true."
But Mr Madden said the representative called Mr Tygart - then USADA's general counsel - who came to Mr Madden's office with the proposal.
"Then, 10 seconds later, because of our ethics, I told Travis to turn it down," Mr Madden said. "We called back that representative and gave them our decision immediately."
Mr Madden said he could not name the Armstrong representative because of a pending whistleblower lawsuit against the disgraced cyclist.
Asked why he thought Armstrong disputed the offer, Mr Madden said: "It's just another personal attack on Travis and USADA."