I'm not sure, but at the time I don't think he had a contract (with the US govt) to supply internet service to Ukraine. We can't really count on the media to do more than play to their audiences, so getting real information is next to impossible.
I agree with Crouton that a hearing is probably in order just to find out the truth, but I've seen lots of Senate hearings and the truth is usually not what any of these people are after (by "these people" I mean politicians). The senators ask stupid loaded questions, the subjects of the hearings are often either not willing to answer, or they are cut off. It's all a big bunch of shit!