There was sufficient evidence for any police officer in Minneapolis to arrest Derek Chauvin, and yet they protected him instead. They all chose to be complicit in his crime.

Various forces have little internal secret rituals in which they all collude in murder. Above we have https://openvallejo.org/2020/07/28/vallejo-police-bend-badge... ; there's another example from NYPD: https://news.ycombinator.com/item?id=23525224

Doctors very rarely turn out politically to defend the malpractice of other doctors.