> I do have to wonder how much (if any) attribution goes to people giving up on the police?

If so, they've been giving up on the police for at least 2 decades.

    Violent crime has been falling since early 90s https://www.statista.com/statistics/191219/reported-violent-crime-rate-in-the-usa-since-1990/

    Property crime has been falling since early 90s https://www.deepsentinel.com/blogs/home-security/residential-property-crime-in-the-united-states/