The sense I got is that he didn't really care about being caught, or at least implicated, he cared more about looking like a rat. IMO, he blames the Feds for making him admit his own failures. It's all he could to do answer truthfully because any evidence if untruth coming from his lips nullifies his limited immunity. The reason the Feds are even involved is because they got a prenup of sorts from the team before agreeing to sponsor them. No doping. The fact that doping on USPS is a foregone conclusion means someone lied to the Feds. They have every right to prosecute to the full extent of the law.

In the future, don't lie to the Feds.