I also can add that the actual death scenes are closely supervised by the police rarely permiting timely access to death investigators. A pathologist I know in CA would allow Prosecutors to attend autopsies only if a Public Defender also was present. She wasn’t very popular to say the least. Past tense. She quit.

A focus on health conditions rather than officers’ actions tells a misleading tale – and in many areas, coroners need no medical training
— Read on amp.theguardian.com/us-news/2020/jul/02/autopsies-police-killings-medical-misleading