Rules are stated from the perspective of an officer on duty. A section on encounters with private persons while on routine patrol covers consensual contact, dog sniffs, general patrol procedures, investigative detention (Terry stop), protective frisk (plain-feel doctrine), and vehicle stops. The section on arrest procedures considers the authority to arrest, arrests on private premises, probable cause to arrest, arrest in a public place, search incident to arrest, the use of force to effect an arrest, and the arrest warrant. The search-and-seizure section addresses probable cause for a search and seizure, property subject to seizure, the search of premises, search-warrant issues, securing the premises, search with consent, the plain view doctrine, emergency search and seizure procedures, administrative search or inspection, and search of persons. Also discussed under search and seizure are booking search property, bodily inspection and samples, and probation and parole searches. Searches under various circumstances and in various settings are discussed as well. Other topics considered in the sections of the field guide are procedures for suspect identification, interrogation procedures, procedures for undercover investigations, and asset-forfeiture procedures. Endnotes in an appendix following each section provide references to the relevant court decisions, and a table of cases at the end of the guide lists all the cases and the pages on which they are cited.