Comment by defrost

Also Sierra Leone in Africa with a homicide rate a third that of the USofA.

Both Ghana and Sierra Leone are gated communities, just as the USofA, the UK, and Australia are.

I'd suggest that Woodmore fails to meet you particular bias, hence you rule it out.

Woodmore likely meets your four intended criteria depending upon the level of internal surveillance .. I suspect it's not surveillance that prevents Woodmore occupants from killing each other.