Why do I have this sneaking suspicion that he was not sober, declared that he wanted to go home, and kept pestering the staff until someone gave in and let him discharge himself? Then in the morning he had forgotten everything except the nightmare journey home? And why is there no statement from the hospital? Usually the newshounds surround the location of this kind of story until they get some sort of reaction.
I think there is more that we have not heard. If it is true as reported, it is scandalous, but maybe that is not all there is to it.