That is a good question. I would call and find out, ask the local politicians, neighbors and get involved. Organizing a Neighborhood Watch might be your best bet. If you are able to have your Neighbors watch out and keep in touch with one another you may be able to have these problems resolved. The reason local police aren't showing up might be that there are no calls in or a demand for patrolling. Have your neighbors sign a petition and write some letters to your local politicians, good luck!