The rest of the story is how many non cops are killing each other and innocent victims.
That and the number of suicide cases using cops as their tool of choice.
Nobody is saying the non-cops were right for killing anyone. What people are complaining about are the instances where cops kill people without appearing to have a valid reason and people seem to think that's OK.
I am sure that you remember the TX man who was no billed after killing a cop. A year or two ago, maybe.
It was considered justified.
That one would not count as a “murder” in the total number.