Data on the Chicago Alternative Policing Strategy (CAPS), including background papers and the results of research can be found at the Institute for Policy Research at Northwestern University: https://www.ipr.northwestern.edu/

The philosophy and practice of community policing has often developed in the United States, information on the operation and principles of many examples can be found at http://cops.usdoj.gov/html/cp_topics/Community-Policing-Topics.asp