For a couple of years, the federal government has remained on the sidelines of a lawsuit in Washington that alleges Lance Armstrong and others made false claims to the U.S. Postal Service in connection with the agency’s sponsorship of a professional cycling team.

The U.S. Justice Department announced February 22, ending months of speculation, that the government is jumping into the suit to back the plaintiff, Floyd Landis, who rode with Armstrong on the professional team the USPS sponsored between 2002 and 2004. The government alleges Armstrong’s use of performance-enhancing substances was a violation of the USPS sponsorship agreement. This amended complaint was filed February 22.