Well, first of all, the police blotter pretty much proves it for all of Canada's major cities. You can say it hasn't been counted up, but if you actually go look at it, the evidence is so overwhelming there's no point to bother counting it. The shooters in Toronto are almost all black. The shooters in Edmonton, etc., are all almost all natives, other than the ones who are black.
If you insist on the regression test, I can do that, but since you're the one insisting on it, despite the fact the police blotters already overwhelmingly make the point, I will need the following data:
-- Black population by city
-- Native population by city
-- Total population by city
-- Average income by city, or even better, % of city population that is low income
-- Homicides per city per year for the last 10 years
It's relatively straight forward to run the regression once I have that. City size, total population, and poverty are likely positively associated with the murder rate, so by including those in the regression I will eliminate their effect. That will let us see whether the native and the black population of a city are contributing to the homicide rate above and beyond the impact of poverty and city size.
It's better to have 10 year homicide data so that smaller cities become more statistically significant, a place that has 1 murder every 10 years won't be well represented in a single year of data.
But again, in looking at crime in Canada's major cities, we can see pretty damn clearly from the police blotters that blacks and natives are doing almost all the public shooting. There are other shoots, but they're relatively rare. In light of that, and in light of the fact that blacks don't make up enough of the poor for that to be the only factor--the case was made pages, and pages, and pages ago. You just don't want to admit it.