Yes. The medical examiner decides if a death is homicide or not.

> result in hundreds of deaths each year

Lacks context - the number of homicides in the same year.

> How many of those would be considered murder in other states?

They're still considered homicide.

> Police killed over 1,300 people last year

That figure is for all deaths where police were involved. A subset of that would be the police killing. Furthermore, if someone points a gun at a policeman, and the policeman kills him in response, that is self-defense, not murder. There are officers killed while on duty, too:

https://en.wikipedia.org/wiki/List_of_law_enforcement_office...

Less than 10% of homicides result from police action.

> how many were murdered by a trigger-happy cop who was not held accountable by his colleagues?

In Washington state, each death from a police encounter are investigated by law, and charges get filed if the officer broke the law. That would include being trigger-happy.

> It’s not objective

It's objective enough. My larger point is there aren't a lot of (or even any) homicides that go undetected in wealthy communities. Furthermore, your figures lack context as you didn't compare with the total amount of homicides. Your figures are not enough to claim that the higher homicide rates in poor communities are the result of police murders.