Acknowledgements

This project is supported by Grant Number 2012HEWXK003 awarded by the Office of Community Oriented Policing Services, U.S. Department of Justice. The opinions contained herein are those of the author(s) and do not necessarily represent the official position or policies of the U.S. Department of Justice. References to specific companies, products, or services should not be considered an endorsement by the author(s) or the DOJ but rather illustrations to supplement discussion of the issues.