Lance Armstrong Investigation: Lance sues USADA

In a move that should surprise no one, Lance Armstrong has filed suit against USADA in an attempt to halt the doping charges he is facing. USADA's CEO responded with the following statement:

In an emailed statement, Mr. Tygart implied that Mr. Armstrong's legal action Monday was nothing new. "Like previous lawsuits aimed at concealing the truth, this lawsuit is without merit and we are confident the courts will continue to uphold the established rules which provide full constitutional due process and are designed to protect the rights of clean athletes and the integrity of sport," said Mr. Tygart.

My main question is whether this response is something you would expect from an innocent person or someone who is backed into a corner and sees his kingdom crumbling before him?