Here is the scoop from (yes) an inside source in Italian Law Enforcement...
The USADA, WADA, or any other governing body isn't going to do the job some would like to see going forward because of lack of money and absolutely no political will.
One of the issues that encouraged the European authorities is the fact that the Feds brought to the table a decent budget to put into the investigation.
They took heart from this, and as the investigation progressed they uncovered much more than they hoped for. Once the US Feds shuttered the idea at what turned out to be almost the final hour, everyone on the other side of the pond threw up their hands in despair and are, one by one, giving up the ghost.
Suddenly the investigation coordinators that convened at Interpol are looking at the money spent so far and are refusing to allocate any more time and resources to what has been referred to as "some stupid old man and his bag of potions" (this is in reference to Dr. Ferrari by an understandably irate Italian prosecutor).
And they are extremely upset with the US Feds for encouraging the investigation and then dropping it, leaving some law-enforcement budgets in a bit of the red with nothing to show for the time and money invested. Expect cooperation going forward in other cases, regardless of import, to be strained.
The evidence/testimony taken from people like Hamilton, Landis, etc. was nothing but icing on the cake. They were just stories to solidify the truly disturbing aspects of what Dr. Ferrari was up to in cahoots with Armstrong and Bruyneel.
But the good doctor lawyered up as soon the Swiss accounts were frozen and the pressure has been relentless from his side, and he is not talking about anything to anyone.
With the budget woes the European community is experiencing, expect Dr. Ferrari to quietly settle out of court with a bit of a fine and nothing more.