Systems of Friction Ridge Classification

The Fingerprint Sourcebook - Chapter 5


National Institute of Justice

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Introduction to Classification Systems

The concept of friction ridge individualization as an infallible means of individualization is rooted in the history of man and our inherent need to individualize ourselves, and be individualized, in an ever-expanding world. As populations grew and cities filled with differing classes of people, the populations of jails and prisons grew also. The ability to accurately identify repeat offenders was critical to the effectiveness of criminal justice institutions. It became paramount that an accurate method of individualization be developed.

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