A topical issue these days. Once again, the same dynamic at play. We know black people are affected disproportionately to their representation in the population, but is a result of police racism or disproportionate criminality?
Mother Jones magazine has an unexpectedly beautiful presentation of the data for us:
The fourth bar seems like what we’re looking for. You could go with the fifth bar, but then you’re just adding noise of who did or didn’t duck out of the way fast enough.
As you can see, a person shot at by a police officer is more than twice as likely to be black as the average member of the general population. But, crucially, they are less likely to be black than the average violent shooter or the average person who shoots at the police.
We assume that the reason an officer shoots a suspect is because that officer believes the suspect is about to shoot or attack the officer. So if the officer were perfectly unbiased, then the racial distribution of people shot by officers would look exactly like the distribution of dangerous attackers. If it’s blacker than the distribution of dangerous attackers, the police are misidentifying blacks as dangerous attackers.
But In fact, the people shot by police are less black than the people shooting police or the violent shooters police are presumably worried about. This provides very strong evidence that, at least in New York, the police are not disproportionately shooting black people and appear to be making a special effort to avoid it.
For some reason most of the studies I could get here were pretty old, but with that caveat, this is also the conclusion of Milton (1977) looking at police departments in general, and Fyfe (1978), who analyzes older New York City data and comes to the same conclusion. However, the same researcher analyzes police shootings in Memphis and finds that these do show clear evidence of anti-minority bias, sometimes up to a 6x greater risk for blacks even after adjusting for likely confounders. The big difference seems to be that NYC officers are trained to fire only to protect their own lives from armed and dangerous suspects, but Memphis officers are (were? the study looks at data from 1970) allowed to shoot property crime suspects attempting to flee. The latter seems a lot more problematic and probably allows more room for officer bias to get through.
[EDIT: A commenter pointed out to me that Tennessee vs. Garner banned this practice in the late 1980s, meaning Memphis’ shooting rate should be lower and possibly less biased now]
The same guy looks at the race of officers involved and finds that “the data do not clearly support the contention that white [officers] had little regard for the lives of minorities”. In fact, most studies find white officers are disproportionately more likely to shoot white suspects, and black officers disproportionately more likely to shoot black suspects. This makes sense since officers are often assigned to race-congruent neighborhoods, but sure screws up the relevant narrative.
Summary: New York City data suggests no bias of officers towards shooting black suspects compared with their representation among dangerous police encounters, and if anything the reverse effect. Data from Memphis in 1970 suggests a strong bias towards shooting black suspects, probably because they shoot fleeing suspects in addition to potentially dangerous suspects, but this practice has since stopped. Older national data skews more toward the New York City side with little evidence of racial bias, but I don’t know of any recent studies which have compared the race of shooting victims to the race of dangerous attackers on a national level. There is no support for the contention that white officers are more likely than officers of other races to shoot black suspects.