Sometimes the cases come out because "standard procedure" ends up killing someone with an underlying medical issue. One case involved cops who would strap a suspect to a chair and then cover their bodies with pepper spray including spraying directly up their nose and into eyeballs. One guy had a heart condition and died. The cops involved usually get some paid vacation if the case is severe enough to make it to the news.

This has happened repeatedly and nobody seems to care.

10 seconds on Google turned up another case from this year.

https://www.keranews.org/news/2021-03-19/north-texas-man-die...