Here's a new article from Reuters laying out some history and facts about "whistle-blower" suits. Interesting the law allowing them, and giving a share to the whistle-blower if the suit is successfu goes back to 1863, civil war era.
http://xfinity.comcast.net/articles/news-sports/20130124/US-USA-ARMSTRONG-LAWSUIT/
http://xfinity.comcast.net/articles/news-sports/20130124/US-USA-ARMSTRONG-LAWSUIT/