Gagnon himself told them, not MJ, IIRC. I have no question in my mind that RG had sex with AR...the only thing is to what extent. He denied intercourse and I don't believe him there. He was in a threesome with AR and MJ...which was fulfilling maybe more than one of his sexual fantasies so why stop at the bj? He had a willing 13 yo at his disposal to with as he wanted.
oh, I agree. It was more than the bj.