The document summarizes key aspects of police organization and functions. It discusses the typical hierarchical structure of police departments and how patrol officers spend most of their time handling calls rather than making arrests. It also describes the major purposes of patrol in deterring crime and maintaining order. Detectives focus on investigating crimes through interviewing witnesses and gathering evidence. Community policing aims to form bonds with communities through foot patrols. Problem-oriented policing addresses specific long-term problems through targeted strategies to eliminate them.