Those people aware of clinical relatioship of the drugs he addicted can precisely talk about the cause of death and there can be some substantial reason why does he go for all that. He did a dramatic outlook of personality with his shining skin from black, and human body has limitation and it has some expiry date too.
no matter whoever is in the earth, he shall face same destiny either today or tomorrow., because god exists and he control things and to him we are all going to return and he will be asking about what you have done with your life and you will be rewarded for that., every human being should take lesson from anyone's death that he will be also in queue to grave yard like micheal jackson. so let us forget it now about him.