The Official US Army Law Enforcement Investigations Handbook - Updated Edition

Q: Who is this book for?

A: This handbook is designed for military investigators, law-enforcement professionals, federal agents, police officers, private investigators, and readers interested in professional criminal-investigation methods. Its military setting also makes it particularly useful for anyone studying how investigative work is conducted within the U.S. Army.

Q: What does the handbook cover?

A: It covers the investigative process from initial case work through evidence handling, interviews, surveillance, crime-scene processing, specialized investigations, and testimony. Subjects include death investigations, assault and robbery, property crime, fraud, drug offenses, traffic collisions, undercover operations, electronic devices, forensic interviews, and investigative checklists.

Q: Is this mainly a military-police manual, or is it useful to civilian investigators too?

A: Although written for the U.S. Army, much of the book deals with investigative principles and techniques that are broadly applicable to civilian law enforcement and private investigation. Evidence, interviewing, surveillance, crime-scene documentation, case organization, and testimony are relevant well beyond a strictly military environment.

Q: What makes this edition different from older Army investigation manuals?

A: This edition presents ATP 3-39.12, the Army publication that superseded the earlier FM 3-19.13 and FM 19-25 investigation manuals. It therefore provides a more current treatment of Army law-enforcement investigations while preserving the detailed, procedural approach that makes official military manuals valuable as reference works.

Q: Is this a quick introductory guide?

A: No. At more than 500 pages, this is a substantial professional reference rather than a short overview. It is best suited to readers who want detailed procedures, explanations, checklists, reference material, and coverage of a wide range of investigative situations.

Q: Does it explain how to conduct an investigation from start to finish?

A: Yes. A major strength of the handbook is that it treats investigation as a complete process rather than a collection of isolated techniques. It addresses gathering and preserving evidence, interviewing people, documenting scenes, pursuing different categories of crime, preparing the case, and ultimately giving testimony.

Q: Why choose an official Army manual rather than a conventional book on criminal investigation?

A: An Army manual approaches the subject as an operational discipline: procedures must be teachable, repeatable, and usable by investigators working under real-world constraints. This makes the book particularly valuable to readers looking for structured professional methodology rather than one author's personal approach to detective work.

Q: Is the physical edition intended for regular reference use?

A: Yes. This is a full-size 8.5 × 11-inch desktop edition, giving more than 500 pages of text, illustrations, tables, checklists, and other reference material plenty of room on the page. The larger format is particularly useful for a technical manual that may be consulted repeatedly rather than simply read once from beginning to end.