Name ___________________________________ Group ____ Date ______________________________

Evidence: Fingerprint Ridge Characteristics (Minutiae)

Warm Up

Objective: Scientists will describe fingerprints and their use by analyzing fingerprints.

1. What is the topic?

2. What will you be doing?

3. Why is this important?

4. How will you know if you have done well?

Introduction

• Ridgeology: The study of the of friction ridge structures and their use for personal .

• Minutiae: Points are were the structure .

IAFIS

● IAFIS is a system capable of reading, classifying, , and storing

fingerprints for criminal justice agencies.

● Quality latent fingerprints are entered into the IAFIS for a search for possible matches against the state

maintained for fingerprint records to help establish the identity of deceased persons or suspects in a criminal case.

Fingerprint Identification

• When minutiae on two different prints match, these are called points of or points of .

• At this point there is international standard for the number of points of identification required for a match between fingerprints.

• However, the United Kingdom requires a minimum points while Australia requires .

• There are legal requirements in the United States on the number of points. Generally, criminal courts will accept to points of similarity.

Ridge Characteristics

• Bifurcations: The point at which friction ridge divides in friction ridges.

Ridge Characteristics

• Bridges: A friction ridge between running ridges.

Ridge Characteristics

• Enclosure (Lakes): A friction ridge that and after short while and continues as a single friction.

Ridge Characteristics

• Ending Ridge: A single friction ridge that within the friction ridge structure.

Ridge Characteristics

• Ridge Crossing: A point where ridges .

Ridge Characteristics

• Ridge Dots: An isolated ridge whose is also the as its .

Ridge Characteristics

• Short Ridges (Islands): Friction ridge of lengths.

Ridge Characteristics

• Spurs (hooks): A bifurcation with one ridge branching off of a ridge.

Fingerprint Ridge Characteristics (Minutiae) Practice

1

2

3

4

5

6

7

8

9

10

11

12

Additional Application

Identify the TYPE of fingerprint (be specific). Highlight and identify the ridge characteristics.

1.____________________________ 2. ________________________ 3._____________________________

4.___________________________ 5. _________________________ 6. ____________________________

7. ____________________________ 8. ____________________________ 9. ___________________________