Until there is a criminal case which uses data directly gleemed from the NSA collection (I assume they have been reverse engineering any useful information for courts), they have probably just been using it internally. Any scandal that made the news (e.g. Mark Foley, Weiner) should be reviewed, and any major political decision (e.g. Justice Roberts flipping on Obamacare) should be looked at.
Shia tried to warn us but we wouldn't listen...
An interesting reversal of the judicial premise, one of those problems that doesn't immediately occur to the brain:
Bank Robbery Suspect Wants NSA records...
The prosecutor is trying to convict on "cell phone records" that pin point location, which is causing a bit of a problem.