West Virginia is one of the poorest states in the US and has been for decades, but has now and continues to have one of the lowest crime rates in the country. Also, from my experience, they have high gun ownership rates.
Violence is
not associated with economic status, otherwise Appalachian areas would be as riddled with crime.
I have never had anyone explain (without studdering and fumbling all over the place) the reason for this.
Also, rural areas of Arkansas have/had high poverty rates and low crime - and again a tradition of gun ownership.
http://wvcommerce.org/people/liveability/default.aspx