There is no end.
We from Italy, think that the director wants us to get crazy to find an end.
Human mind is so sensible to all of these psychologic stories that, We, innocent movies' lovers have to find out an end.
However, i understood the movie in this way: i kept that Mr. Hearst is not guilty of the murder...he's only psychologically moved by sense of rage because of the decision of his wife to leave him. And that's for it that he, at the end, wants to confess.
But finding an end has not sense, because for me, the director wants to give us no end.