Fingerprint Principles Fingerprints follow ___ fundamental principles: A fingerprint is an _______________ characteristic; no two people have been found with the ______ same fingerprint pattern. 1

Fingerprint Principles A fingerprint ______ will remain _________ for ____; however, the print itself may change due to permanent ______ and skin _________. 2

Fingerprint Principles Fingerprints have general characteristic ________ patterns that allow them to be systematically __________. 3

Fingerprint Classes There are __ specific classes for all fingerprints based upon their ______________: arches, loops, and whorls. Each group is divided into ________________ 4

_____ of people have loops, _____ have whorls, Interesting Info Fingerprint Factoid: _____ of people have loops, _____ have whorls, and _____ have arches 5

Arches Arches are the __________ type of fingerprints that are formed by ________ that _______ on one side of the print and _______ on the other. No _______ are present. Tented Arches Similar to the plain arch, but has a ______ in the center. Spike or “tent” Plain Arch Ridges enter on one side and exit on the other side. 6

Loops Radius Ulna Left Hand Loops must have ________ and one or more ridges that _______________ on the same side. These patterns are named for their positions related to the _______ and ______ bones based on the bone the loop ________ is facing. Ulnar Loop Radial Loop Delta

Whorls Whorls have at least ____ ridge that makes a _________ ________. They also have at least ____ deltas. If a print has more than two deltas, it is most likely an __________. Central Pocket Whorl Plain Whorl 8

Whorls Draw a line between the two deltas in the plain and central pocket whorls. If _______ of the _______ ________touch the line, it is a _____ whorl. If ______ of the center core touches the line, it is a __________ _______ whorl. Central Pocket Whorl Plain Whorl 9

Whorls Double Loop Whorl ________________whorls are made up of any two loops combined into one print. Delta Accidental Whorl ____________ whorls contain ____ or more patterns or does not _______ fall under any of the other categories. 10

Identify each fingerprint pattern. ? A B Right Hand Left Hand Answer Key: A - Plain Whorl, B – Double Loop Whorl, C – Radial Loop, D – Tented Arch, E – Plain Arch C E D Right Hand Right Hand Left Hand 11