Not true any longer. Look at the Amish school shooting in Lancaster County PA. The affluent neighborhood isn't spared criminal activity either. Look at Montgomery County, Maryland. Ranked as one of the highest salaried counties in the US, and crime is rampant. The only commuity I know that has no crime is Gibson Island in Maryland. It is a gated community on an island. Drive over a bridege, then your greeted by the gate. Can't get in other than by boat. Now they do have some petty theft and every now and then a boat theft, some of which are worth more than my house.
Crime is everywhere. If there are people, there are crimes. How serious of a crime, that's up for debate, but there is crime everywhere.
Jim Smith