@spendius,
He practiced his trade/profession in a completely reckless and careless manner that resulted in the unnecessary death of his patient.
Causing a death in such a manner is a crime in and of itself.
Let see if I go out in as field where it is allow to fire a gun but instead of firing at a target that had a backstop I fire at a target that had no backstop and in the direction of homes in the distant.
The result was the killing of an old lady in her kitchen.
Now the following elements come into play.
Did I know or should had known that a bullet from my firearm could carry that far?
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The good doctor was aware of the risks he was running in treating MJ in the manner he did and that MJ could indeed die under his treatment.
Would a person with my level of skill and knowledge in the handling of firearms take the risk of firing in the directions of the homes?
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No medical witnesses indicate that they would had treated MJ at his home with the equipments and under the condition then existing in the home.
Did I show other elements of being reckless and uncaring of the life and safety of others such as drinking while I handled the gun?
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The good doctor let the room to made phone calls leaving his patient un-monitor and if he had not done so the expert opinions where that MJ could had been stop from having a problem let alone dying.
To sum up but for the doctor treatment and complete uncaring recklessness in his monitoring MJ would be alive today.
That is a crime all by itself the same as my careless firing of my gun that ended up killing an old lady.