This was on Greg Ellefritiz's blog. The TLR version is that OIS will mirror the department's racial makeup. If a department is 70% white, 20% black, and 10% hispanic, roughly 70% of OIS will involve white officers, 20% black, and 10% hispanic. The race of those shot will mirror who is committing violent crimes in an area.
https://www.policeone.com/officer-sh...kely-to-shoot/