Depends on your definition of justice does it not? All the evidence in the possession of the DA was presented to the Grand Jury, and he was criticized for that......imagine if he had withheld some of the evidence/witnesses......
Some will say "justice" would only be served if the cop was charged with murder.......is that justice if there was not evidence that he had committed murder?
I have no idea if he acted in accordance with Police Procedure and legally or not, as others, I have not read all the evidence given to the GJ and is now available on the internet for anyone to review.......
Now, back to "justice," the DA and Police investigated the incident, gathered all the evidence and witness testimony they could and presented it to a Grand Jury for "the people" to determine if this cop should be prosecuted for a criminal offense.
That is HOW our "justice" system works.............so, was justice served?