Chapter 6 aggressive patrol A patrol strategy designed to maximize the number of police interventions and observations in the community. clearance rate The percentage rate of crimes known to the police that they believe they have solved through an arrest; a statistic used to measure a police department’s productivity. to arrest; a statistic used to measure a police department’s productivity. differential response A patrol strategy that assigns priorities to calls for service and chooses the appropriate response. directed patrol A proactive form of patrolling that directs resources to known high-crime areas. incident-driven policing A reactive approach to policing emphasizing a quick response to calls for service. line functions Police components that directly perform field operations and carry out the basic functions of patrol, investigation, traffic, vice, juvenile, and so on. preventive patrol Making the police presence known, in order to deter crime and to make officers available to respond quickly to calls. proactive
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