WASHINGTON, DC -- NBC News reports that the federal government has joined a lawsuit against Lance Armstrong.
The government signed on to a suit filed two years ago by Floyd Landis, one of Armstrong's former teammates.
The suit claims that Landis saw Armstrong store and then re-inject his own blood to boost his performance, and Armstrong twice gave Landis banned hormones before races.
The government is joining the case because when Armstrong agreed to race for the U.S. Postal Service team a decade ago in the Tour de France, he violated its ban on performance enhancers. Armstrong is now accused of defrauding the government.
Armstrong claimed that he one all six of his now stripped Tour de France titles without doping. He has recently publicly admitted to using performance enhancing drugs.