[SmG Nukem]

The most you could call this is manslaughter not murder. There was no intent to kill.
Like it or not he was a suspected criminal that resisted arrest and had to be subdued. Something did go wrong but it was not the intent of the police to do anything other than subdue.
Where the cop had him subdued should not have cause him to stop breathing or cause any injury but unless you have access to the coroners report it is impossible to say what happened.
Cops should not be punished if they did their job correctly but because of politics they most likely will be punished unfairly.