Williams & Connolly is refusing to turn over documents about the firm’s relationship with Lance Armstrong as the disgraced cyclist fights allegations that he defrauded the U.S. government by lying about his use of performance-enhancing drugs.

One of Armstrong’s former teammates, Floyd Landis, who brought the fraud claims against Armstrong, filed papers last week asking a federal district judge in Washington to force the Washington-based law firm to produce the documents. He argues that Williams & Connolly can’t claim the records are protected by attorney-client privilege because the firm was part of Armstrong’s scheme to lie about his use of banned substances.