I'm just concerned if they have the technical know-how of doing it. I mean yeah what you said is right. The proof. Otherwise going after someobody who might be innocent.
You should go ahead and call your local police department. Chances are that they don't deal with cyber crimes unless you live in a large city (or if your city contracts with a larger police department).
There's also the issue of jurisdiction. If the crime is originating across some border (which more than likely it is), there's probably not much they're willing to do about it.