PDF - http://www.cops.usdoj.gov/mime/open.pdf?Item=1463
"Researching a Problem" (72 pp.) (NCJ 209526), a new COPS POP Guide, is the second guide in the Problem-Solving Tools Series designed to summarize knowledge about information gathering and analysis techniques that might assist police at any of the four main stages of a problem-oriented project: scanning, analysis, response, and assessment.
