This is also true, but I would suggest it is also not the whole picture. Within the relevant timeframe the DA typically declined to prosecute things the police

This is also true, but I would suggest it is also not the whole picture. Within the relevant timeframe the DA typically declined to prosecute things the police force believed were important, such as protests that included violence or threats of violence. In response, the police force stopped arresting people for all manner of crimes that the DA would still prosecute. Perhaps best framed as a three- or four-way disconnect among the citizens, politicians, the judicial branch, and law enforcement.