Do you have statistics that show that? Are more cops charged and imprisoned after murdering unarmed people every year, or does the number of unarmed murdered people go down, at all? People who die mysteriously in custody?
https://www.washingtonpost.com/investigations/fatal-police-s...
However, the overall trend in police killings is flat.
https://mappingpoliceviolence.org/nationaltrends
Interestingly:
“White Police Officers Are Not More Likely To Shoot Minority Suspects”
https://www.npr.org/2019/07/26/745731839/new-study-says-whit...