while violently resisting arrest.
They need to find better heroes.
When the police commit crimes, they will generally be against unsavory characters.
And, even with the drugs in his system, if the police "restraining" him in such a clearly egregious way killed him, the rest doesn't matter.
As I recall from the (small amount of) legal classes I've taken: you are faced with what your actions did to THIS victim, not what they would have done to some random victim. If your illegal punch kills a man because he has a paper thin skull, it doesn't matter that it wouldn't have killed the average man. It DID kill this man and you are guilty of murder.