The book moves from a general discussion of artificial intelligence and expert systems in law enforcement to a description of technical aspects important to the adoption of expert systems. The first two chapters provide an overview of expert systems as they apply to different law enforcement activities and discuss the policy implications of system use. The third chapter describes practical applications for expert systems in computer-aided dispatching, crime solving, and training. From these descriptions, law enforcement practitioners should be able to gauge the impact of expert systems on their commands, operations, and administration. The fourth chapter introduces the reader to expert systems and is directed to individuals who are interested in developing these systems in the law enforcement context. The fifth chapter provides a basic introduction to the field of artificial intelligence. The sixth chapter is intended to help potential expert system designers or data processing managers by discussing problems, system efficiencies, and technical requirements. The seventh chapter presents a case study of the Baltimore County Police Department's expert system for residential burglaries. Appendixes contain a list of expert system vendors, a glossary, and two bibliographies. One annotated bibliography surveys recent literature on police issues, while the other lists references to publications on expert systems and automation in law enforcement. 90 references, 9 figures.