But isn't it the case that if not for 'trial by media' (AKA public opinion) there would have been no action taken?
Whatever happened between Andrew and VG happened years ago, and it is only since the photo was released and she accused him that it has been in the News, and it is only since her death and the leak of the emails that the palace has got involved. Absolutely nothing was done until then.
As has been said numerous times on this thread, physical proof is impossible to produce after all this time, and anything else is assumed to fly in the face of 'innocent until proven guilty', so is discounted. It is, arguably, only because the public has got this case in its sights that anything has been done. The chances of Andrew admitting any wrongdoing are slim to none - we saw that on the Newsnight interview.