Re your BBC Trending of 14 July The black cop who has a problem with 'Black Lives Matter' there's the latest data in the below-linked article, front-paged in a recent International New York Times. It contradicts many of comments by your associate professor Stinson, in his rebuttal of Officer Stalien's views.
This study is the latest in the field. It was carried out by a prize-winning young African-American professor at Harvard University.
Key conclusion: shootings of blacks by the police are at a lower RATE than police shootings of all other races.