I think a good tool to reduce crime; could be banishment; depending on the crime; after conviction and time served; banishment from city, county, state could go into effect, violation would lead to immediate imprisonment without trial or much like what would happen to a parole violator.
Just a thought that would need to be researched as to the details; but it has been used in the past; ridicule and banishment have been know to be effective deterrents.