Lots already. Even if you ignore the Constitution, people running the NSA and general security state have been caught lying to Congress (a crime), lying to the kangeroo FISA court meant to be overseeing them (contempt of court), lying to regular courts about whether defendents were being informed about the origin of evidence against them (more contempt of court), violating FISA court orders (more contempt), and re-interpreting the PATRIOT Act in such a way that even the guy who wrote the damn thing was shocked - that's just normal law breaking: you aren't supposed to be able to "reinterpret" laws however you see fit.
But when you ask "is there a way to charge anyone with a crime", I think you already know that the answer is yes just because there are so many vaguely worded laws in the USA that basically anyone can be charged with some kind of crime. What matters is whether you actually ARE charged, and that's an entirely politically driven decision.
That's the situation in the USA. In the UK the laws are much worse and much vaguer, believe it or not, to the extent that there's basically no functioning oversight at all - the UK equivalent of FISA is not only not a court, it's actually staffed by anonymous people! There's no way to find out who even sits on it. And they have never ruled against the intelligence services even once: FISA Court has at least made a token effort to appear useful. RIPA, the law that is claimed to authorise such collection, is so vaguely worded as to be basically useless as a law - it would appear to authorise practically anything. And the Prime Minister, unlike Obama, has rejected the very notion that there might be a debate at all - simply asserting that if GCHQ does it, it must be by definition be OK.
So even though the situation in the USA is dire, it's actually not as bad as it could be.