"...The mere fact that a federal employee's actions may have been unlawful is not enough, by itself, to find that the employee's actions were outside his authority. "

From the Chief Thunder thread(tacked above this one somewhere).

From my (non-lawyerly) view this means that a Fed can basically violate any law he wants in order to get evidence.  
Some lawyer type out there want to correct my view on that?

That never happens! *cough* Ruby ridge *cough*