Seriously, what do you expect they would do at this point? He overdosed on painkillers, it happens. Yes, they probably are giving him a pass because of his celebrity, but it's hard to disfellowship a dead person anyway, so who knows what would have happened if he had been a regular person? Do you honestly expect the Watchtower to bring more attention to his tragic death by saying anything at this point?
Whatever his demons were it's obvious the religion didn't help him any. Maybe he had been struggling with this and was afraid to say anything knowing how judgemental the elders would be. To me he is just another victim of the Watchtower.