Well, if these facts are true, it indeed is a homicide. No ethical doctor would EVER prescribe propofol as the sole purpose of making someone sleep because they have insomnia. Propofol is an anesthesic, and it's only useful purporse in medicine is for being used/prescribed is to sedate a patient in order to do a painful/disturbing procedure so that they won't really feel/remember it and so that they can relax. It needs constant monitoring while it's being used as well.
Unfortunately, this doctor just gave in for the money he received from Michael in order to feed his ambition. While I can't say Michael isn't at fault for his own death, I can say that, if this doctor were a person who vowed to do his profession ethically, he would never have used these drugs for the purposes of feeding Michael's addiction. In this case, there's a Michael's song that fits this perfectly:
MONEY
Money.
Money...
Lie for it
Spy for it
Kill for it
Die for it
So you call it trust
But I say it's just
In the devil's game
Of greed and lust
They don't care
They'd do me for the money
They don't care
They use me for the money
So you go to church
Read the Holy word
In the scheme of life
It's all absurd
They don't care
They'd kill for the money
Do or dare
The thrill for the money
You're saluting the flag
Your country trusts you
Now you're wearing a badge
You're called the "Just Few"
And you're fighting the wars
A soldier must do
I'll never betray or deceive you my friend but...
If you show me the cash
Then I will take it
If you tell me to cry
Then I will fake it
If you give me a hand
Then I will shake it
You'll do anything for money...
Anything
Anything
Anything for money
Would lie for you
Would die for you
Even sell my soul to the devil
Anything
Anything
Anything for money
Would lie for you
Would die for you
Even sell my soul to the devil
Insurance?
Where do your loyalties lie?
Is that your alibi?
I don't think so
You don't care
You'd do her for the money
Say it's fair
You sue her for the money
Want your pot of gold
Need the Midas touch
Bet you sell your soul
Cuz your God is such
You don't careYou kill for the money
Do or dareThe thrill for the money
Are you infected with the same disease
Of lust, gluttoney and greed?
Then watch the ones
With the biggest smiles
The idle jabbers...Cuz they're the backstabbers
If you know it's a lie
Then you will swear it
If you give it with guilt
Then you will bear it
If it's taking a chance
Then you will dare it
You'll do anything for money...
Anything
Anything
Anything for money
Would lie for you
Would die for you
Even sell my soul to the devil
Anything
Anything
Anything for money
Would lie for you
Would die for you
Even sell my soul to the devil
Anything
Anything
The saddest thing is, if this Murray hadn't give in for huge ammounts of money in order to do his profession irregularly, other "sold for money" physicians would have done that anyways