Somehow I just can't imagine it. He'd probably have to be pretty sophisticated to get into Purdue. He's not a child. Anymore. May not even know anything. Lots of us don't think of family questions we should have asked until we're older and everyone's gone who'd know. Death of a sibling would be too traumatic to even think about too much, I'd think. And they would have known what to tell him, had him in counseling, didn't they?
I'll predict something too. I think the real killer of JonBenet also killed Helgoth, and if anyone else could finger him, they'd covertly get suicided too, and there'd be some story about their being depressed or otherwise nuts. Any others who know may in fact already be dead.
We can dream, though, if we need to in order to keep going. The extreme mystery of the case is enough for me. It seems as complicated as the JFK, RFK, MLK and other assassinations, where witnesses were threatened according to one of the books, and died anyway. I'm rather curious re how they died. And the truth about all that may come out eventually too. A theory at Konformist.com , "Daddy's Little Princess", which I only skimmed, it's so long, is that JR had some kind of gov't connections. Don't know, just "FWIW". That might explain not getting the phone records (?) Or, LE may indeed have them.