I am not fully understanding your question since I said I felt if RL knew anything at all he would have long ago told LE.
I have seen no evidence or anything to suggest that RL told the police anything that would be helpful in catching BG (then or now) or that he even knew him or knew BG had been there with the girls.
But then again, I am not sure what you are asking or saying? What evidence makes you think he told LE and that he knew BG?
It seems if he was that helpful his lawyer would have made a deal for him not to go back to jail in exchange for important information that would help the investigation like others in his situation have done and were spared going back to jail for giving valuable information on certain cases.