The procedures proposed in the handbook are intended to supplement traditional intelligence gathering and, as a result, to reduce costs and increase effectiveness. While the procedures are not predicated on any particular community size, they do assume a community size sufficient to attract the interest of organized crime in profit opportunities in business or labor management, extortion, or corruption of public officials. In working toward the ultimate goal of reducing the influence, scope, and activity of organized crime, these procedures should also achieve several interim objectives: yielding investigative leads quickly and efficiently, detecting organized criminal activity in areas not otherwise known to be infiltrated, and measuring the effectiveness of specific police actions. Seven case studies describe specific applications of the general hypothesis to individual types of organized criminal activity, namely industrial worker loan sharking, criminal infiltration of business, sale and distribution of untaxed cigarettes, illegal off-track betting, business extortion, labor racketeering, and labor union welfare and pension plan fraud. 17 figures