1. Fingerprints bsapp.com

3. Principles of Fingerprints First Principle: A fingerprint is an individual characteristic; no two fingers have yet been found to posses identical ridge characteristics. bsapp.com

4. Principles of Fingerprints Second Principle: A fingerprint will remain unchanged during an individual's lifetime. bsapp.com

5. John Dillinger bsapp.com

6. Principles of Fingerprints Third Principle: Fingerprints have general ridge patterns that permit them to be systematically classified. bsapp.com

7. Three Main Types of Prints Loops Whorls Arches bsapp.com

8. Deltas & Cores bsapp.com

9. Loops A loop must have one or more ridges that enter from one side of the print, re-curve, and exit from the same side One Delta & One Core bsapp.com

13. Whorls One or more cores At least two deltas bsapp.com

17. Arches An arch is formed by ridges entering from one side of the print, rising slightly and exiting on the opposite side. No Deltas & No Cores bsapp.com