I think it is very probable that there is some amount of racial bias when it comes to police shootings, but police-on-police shootings is not very good evidence

I think it is very probable that there is some amount of racial bias when it comes to police shootings, but police-on-police shootings is not very good evidence in favor of that. Not enough data (26 cases in 30 years), the data is from 40 years ago up until today, and it is a completely different situation that police on civilian.