Oh I can definitely help with that last point!
(1) In 2017, the Justice Department released a report documenting significant systemic racism in the Chicago Police Department: https://www.chicagotribune.com/news/local/breaking/ct-chicago-police-justice-department-report-20170113-story.html
(2) Here’s an article out of Vox that documents systemic racism in use of force, pulled from FBI data: https://www.vox.com/identities/2016/8/13/17938186/police-shootings-killings-racism-racial-disparities
(3) And if the Washington Post is your preferred news outlet, here’s a really good review of systemic racial bias in policing and criminal justice: https://www.washingtonpost.com/news/opinions/wp/2018/09/18/theres-overwhelming-evidence-that-the-criminal-justice-system-is-racist-heres-the-proof/?noredirect=on&utm_term=.2a7e418afacd
There’s much more where that came from, but these 3 should offer a good primer about the systemic racism that exists in policing.