[ Finally, analysis of police shooting data as a function of county-level predictors suggests that racial bias in police shootings is most likely to emerge in police departments in larger metropolitan counties with low median incomes and a sizable portion of black residents ... ]

That's a lot to go through this early in the morning, so forgive me if this has been covered already, but did they analyze the risk of police officers being attacked/killed by the particular race that there's a (police shooting) bias against compared to other races in those counties?

I'm curious if there's a correlation between "assault on police officers is X times more likely to occur by someone from race Y" and "police officers are Z times more likely to shoot someone of race Y".

I'm not trying to imply anything (even though I know it sounds that way). I'm just curious.