>Source? What are the relative numbers?
Here is the source and the only real study about the subject. The data shows that you are actually more likely to be shoot/killed when stopped by the police if you are white than if you are black.
This article uses real data from police: https://www.washingtonpost.com/news/wonk/wp/2016/07/13/why-a...
This one even more interesting used psychological tests and get's the same result. Police are more likely to shoot a white suspect: https://www.washingtonpost.com/news/true-crime/wp/2016/04/27...
And yet a final one showing that black cops are more likely to shoot black people than white cops: http://www.washingtontimes.com/news/2016/dec/26/black-suspec...
Totally destroys that theory some people are trying to spread that there is this systemic racism in police about killing black people.