Gaddafi War Crimes

What is the evidence again of Gaddafi's war crimes?

Until fairly recently there was "no confirmation whatsoever" that Gaddafi was firing on his own people, despite this being an apparent justification for military intervention:-

http://www.defense.gov/transcripts/transcript.aspx?transcriptid=4777

Q: Do you see any evidence that he actually has fired on his own people from the air? There were reports of it, but do you have independent confirmation? If so, to what extent?

SEC. GATES: We’ve seen the press reports, but we have no confirmation of that.

ADM. MULLEN: That’s correct. We’ve seen no confirmation whatsoever.

That was in March, since then unless I'm (very possibly) mistaken, all we have is Luis Moreno-Ocampo having said in mid-May that he has "proof" and "strong evidence" of crimes against humanity etc, without any details.

Is there anything more concrete and up to date? I do really want to be corrected, because otherwise it beggars belief that our government is reportedly spending £3 million a day on this war whilst looking to 'save' money to the effect of £200 million by cutting things like housing benefits, which will potentially leave many people vulnerable on the streets, or at the least having to live in increasingly adverse circumstances.