USADA was formed out of the USOC . Travis Tygart worked for both groups . http://www.theguardian.com/sport/2003/apr/24/athletics.duncanmackay
Tygart has always struck me as a real snake in the grass, very untrustworthy. You can almost tell just by looking at him. He has a very fidgety high strung sneaky demeanor. http://www.youtube.com/watch?v=JEx_vN6dp8M
He worked for the law firm that Defended the USOC when they let over 100 usa athletes off positive drug tests . Carl Lewis included.