You need to do a lot more than just have the gun in the car to get shot
I’m having some difficulty finding figures I can digest, but it does look as though black people are shot by police officers at about double the rate they occur in the UK’s population.
https://fullfact.org/law/bame-deaths-police-uk/
IPCC breakdown tables
They’re arrested at a rate something like 3x higher than white people are, and stop and search statistics are sometimes even more skewed.
That said, about 75% of black people who are convicted of a crime seem to be convicted of a drug offence, and they are appreciably more likely to be convicted of offences relating to Class A drugs.
Big Government Report
Handy Government infographic
So there may well be nothing more to the higher-than-representative shooting rate than a higher-than-representative involvement in heavy-duty armed drug crime. But it’d be as well to be wary of racial bias. That would seem to mean asking; does intelligence that a suspect may be armed get treated more seriously if the suspect is black, leading to an armed operation and more wary officers? Do armed officers tend to perceive behaviour by black people as more threatening than the same behaviour by white people? Where officers do fire on a suspect, is it more likely that no weapon is found on the suspect if he was black? If the answer to those sorts of questions is a “yes” on average, then that’s going to raise the shooting rate for reasons that are basically race-driven, and it would be as well to counter that in training so far as reasonably possible (and I’m imagining this is done already really…).