Two years after Michael Jackson's shock death, the mystery over exactly how he died continues to fuel legal wrangling, conspiracy theories and family strains over the King of Pop's clouded legacy.

While fans are expected to pay their respects this weekend -- including by dropping red roses from the air over his famous Neverland ranch -- many questions remain over his death on June 25, 2009 aged only 50.

His personal doctor Conrad Murray is still awaiting trial on manslaughter charges for allegedly giving Jackson an overdose of powerful sedative propofol to help him sleep on the fateful morning at his Beverly Hills mansion.

The trial was to have started in May, but has been delayed until September after his defense lawyers -- expected to argue that Jackson effectively killed himself -- said they need more time to prepare.

Days ahead of the second anniversary of his death, Jackson's sister La Toya published a new book reiterating her claim that he could have been murdered, and had voiced fears to her that he would be for financial reasons.