This is one of those "awkward statistical analysis" moments where the outcome of the analysis should be...well...as an analyst, i think, ridiculously obvious before its even carried out... if you have any familiarity with the topic/history/culture. But I also can respect its a topic that needs careful interpretation and isn't likely to go down well in everyday english.
So what we'd expect to see is:
1) A bias is present: any study based on american society at large that DOESN'T find a bias in its behaviours/outcomes involving the black community, in terms of either wealth, incarceration, shootings, education, employment, etc etc etc must be so off you'd be more likely to disregard the evidence collected rather than believe the study/conclusion.
2) This is because, not surprisingly, all those things are so highly correlated and historically caused.
3) While I respect that it MIGHT be an interesting question to study whether, controlling for all confounding cultural and obviously explanatory variables, police are more likely to shoot black people in america, and you might even find a very very very weak effect there explained by the low pay, the correlation between low pay/racism/education, and the tendency of police as a career to attract authoritarian personalities, this is in many ways a politically pointless conclusion, because I'd bet good money that you both need to have quite sophisticated statistical understanding to really "get" what such a study is saying, it would be a horrendously complicated statistical study to almost swamp any practical implications and raise very valid questions about its methodological valididty, and I think any effect you may find will likely be swamped statistically by all other factors of black bias in american society.
4) It does no practical good to be able to go up to black groups and say "No no no, its not that police are particularly biased against you because you're black and police are racists, its just that because the higher-order causes of racism and racial history in american society: i.e. you're poor, uneducated, encounter the police more often, commit more crimes, american historical wealth disparities and racial wealth disparities, americans are more likely to carry and be afraid of guns, etc, means that you're just more likely to encounter them and therefore they're more likely to shoot you...so just go home and chill."
That socioeconomic/historical/political factors are the main determinant of things here strikes me as both:
a) Statistically and historically obvious
b) Totally irrelevant to the actual question of whether institutional bias is outrageous/real/needs to be fixed/the reality of black experiences on the other side of that equation.