On Saturday, July 11, 2015 at 7:51:02 PM UTC-7, Bob Pasker wrote:
FWIW, Class C airspace has a 20nm uncharted procedural outer area, which means that they have approach radar to 20 miles, and hat would include the point where the mid air occurred. --bob

Yes, if he was in fact doing an approach at the time... which it seem fair to assume, and you would hope he would be talking to approach even if not, but who knows, the radar and audio tapes should really help solve this one quickly. Even a good idea of the altitude of the mid-air would answer a lot of the possible scenario questions I have.