Police office deaths rise as the black population rises.
https://www.usatoday.com/news/
https://www.pewresearch.org/social-trends/2021/03/25/the-growing-diversity-of-black-america/re_2021-03-25_black-americans_0-01/
https://www.pewresearch.org/social-trends/2021/03/25/the-growing-diversity-of-black-america/re_2021-03-25_black-americans_0-01/