I don't think you can use this datapoint for this purpose. Cops are employing the paranoid strategies already, so there's no way to discern between 'these strategies are needless' and 'these strategies are effective'.
You could probably do a comparison between jurisdictions where police homicides are common and jurisdictions where they aren't common. Assuming that there are cultural factors anyway.
Like sure, areas with higher rates of criminal violence will probably have more police homicides, but it's likely enough that you can pair things up based on rates of criminal violence.
