Michael was living two lives - the sweet innocent and obviously talented Peter Pan character, and the shady autocratic deceitful two faced monster that he hated in Joe Jackson.
The responsibility for taking those drugs is Michael's, but of course, financially desperate or not, a doctor ought to n\know better. There is the Hippocrattic oath after all. Murray's pathetic statement - "the truth will prevail" - isn't necessarily good news for him.
Murray has spoken to police and last week released a video saying he "told the truth and I have faith the truth will prevail."