Stephanie McIlvain, one of seven-time Tour de France winner Lance Armstrong’s former close associates, testified before an American grand jury on Wednesday.

The grand jury wanted to hear from McIlvain because it is looking into systematic doping in professional cycling. McIlvain was questioned about the events in a hospital room in 1996 when she and others were visiting Armstrong, who was being treated for cancer at the time.

According to an ex-team-mate of Armstrong’s and his wife, Armstrong told doctors in that room that he had used performance-enhancing drugs.

McIlvain testified that she never heard Armstrong’s admission.

However, McIlvain was taped in a 2004 phone call, telling American cyclist Greg LeMond that she heard Armstrong’s admission and she was willing to testify to that.