Landis was discredited and disowned in short order Saturday when elevated levels of testosterone showed up in his "B" or second doping sample -- as it did in the initial "A" sample released last week.
The samples also contained synthetic testosterone, indicating that it came from an outside source.
Landis again denied cheating.
"I have never taken any banned substance, including testosterone," he said in a statement. "I was the strongest man at the Tour de France, and that is why I am the champion.
"I will fight these charges with the same determination and intensity that I bring to my training and racing. It is now my goal to clear my name and restore what I worked so hard to achieve."