The Science of Fingerprints: Classification and Uses

This concise handbook offers a clear overview of fingerprint science for anyone tasked with identifying individuals. Drawing on decades of FBI experience, it explains how ridge patterns—loops, whorls, and arches—are captured, classified, and compared. Readers learn why fingerprints have become the most reliable tool for linking suspects to crimes, surpassing older methods like tattooing or the Bertillon system. The text also outlines the practical steps for taking quality impressions on various surfaces.

Beyond criminal cases, the guide highlights the broader value of fingerprint databases, from locating missing persons to identifying disaster victims. It describes the FBI’s classification system and the massive civil file that supports humanitarian efforts. Volunteers who submit their prints play a crucial role in expanding the resource, making it more useful for agencies nationwide. The book balances technical detail with real‑world examples, helping new officers build confidence in this essential investigative skill.