I agree with James that we should hear from him.
My point on the in camera session wasn't so much about the possibility of grandstanding by any party. It would be unfortunate if that happened. It was more the sense that he may have some things to say that he would be more comfortable saying in camera, that he may not actually say in public, and that this committee could then either contemplate, as you say, in the form of a future report or just take under advisement for its own consideration. The value added may, paradoxically, actually be through an in camera session.