Did Callinan resign or was it just an Enda cop-out?

WE NOW know who killed Lucy Beale, but still have no idea what happened to former garda commissioner, Martin Callinan.
While it is nice to see Taoiseach Enda Kenny attempting to rehabilitate himself back into society, after four long years locked in the bunker of Government Buildings, there is not much point in finally giving a TV interview if you have nothing to say.