The connection between poverty and crime is fatherless “families.” Those who grow up living with a married mother and father are at a low risk for criminal activity, irrespective of family income.
Better way of putting it is that crime is culturally induced not poverty induced. A morally high community can be materialistically poor and crime free. What throws most people off on this is that most US communities are not homogeneous and thus have a mixed culture (or lack there of). This town is culturally homogeneous.