1. Introduction -- 2. Understanding fatigue -- 3. Approaches to shift work -- 4. Sources and expected impact of fatigue on police officers -- 5. Pervasiveness of fatigue among police officers -- 6. Potential causes and correlates of police fatigue -- 7. Potential effects of fatigue on officer performance, health and safety -- 8. Starting to mange police fatigue -- 9. Summary and conclusions -- Appendix A. Sleep and fatigue management Internet sites -- Appendix B. PERF/NIJ study survey instruments -- Appendix C. PERF/NIJ study departments -- Appendix D. Checklist of things we can do now -- Appendix E. Analytical details.