ippy: "...local criminal families, the children are brought up to see this kind of behaviour as the norm."
Indeed, it's very hard to change those attitudes which are inculcated from youth.
Very often people in prison, inmates, especially the younger ones, are fed up with their lot and want to live differently but when they leave, they go back to exactly the same environment with family and friends holding to criminal values, treating them like "Wusses" for wanting to change. No wonder so many re-offend.
Rehabilitation has to continue after prison.