How to Roll a Suspects Fingerprints:
Step One: Make sure lab space is clean Step Two: Have ink and printing card ready Step Three:Take suspects right hand and begin with the thumb. (remember to start by putting the suspect in the direction of most resistance to least resistance ) Step Four: Roll the finger on ink Step Five: Roll inked finger on to the printing card and place the thumb in indicated section on the card. Step Six: Repeat the steps with every finger and also left hand. (Remember to always start with thumbs). Calculating a Person's (Henry) Primary Identification Number:
Step One: Make sure you have all ten fingers and prints. (All whorls are worth points, loops and arches are worth zero) Step Two: Clasify every finger as either a whorl or arch or loop starting with evens. Evens includes: R. Index, R. Ring, L. Thumb, L, Middle, L. Little. Odds includes: R. Thumb, R. Middle, R. Little, L. Index, L. Ring Step Three: Give points to each finger in the same order remembering whorls gain points, arches and loops equals zero points Evens includes: R. Index 16, R. Ring 8, L. Thumb 4, L, Middle2, L. Little1. Odds includes: R. Thumb16, R. Middle 8, R. Little 4, L. Index 2, L. Ring 1 Step Four: You add the points gained from evens and add 1. Do the same for odds. Step Five: Like in the example below 20/15 will be your Henry Classification. ex: 16 + 0 + 4 + 0 + 0 +1 = 20 0 + 8 + 4 + 2 + 0 +1 = 15 Final Classification: 20/15 My Classification: 0 + 0 + 0 +0 + 0 + 1 = 1 0 + 0 + 0 + 0 + 0 + 1 = 1 My Henry Classification: 0 + 0 + 0 +0 + 0 + 1 = 1 0 + 0 + 0 + 0 + 0 + 1 = 1 Final Classification: 1/1 -This is the most common classification For more information click the link:http://shs2.westport.k12.ct.us/forensics/04-fingerprints/henry_system.htm |
Right Hand: Finger One: Ulnar Loop Finger Two: Radial Loop Finger Three: Ulnar Loop Finger Four: Ulnar Loop Finger Five: Ulnar loop Left Hand: Finger Six: Ulnar Loop Finger Seven: Ulnar Loop Finger Eight: Ulnar Loop Finger Nine: Ulnar Loop Finger Ten: Ulnar Loop Minutiae:
Blue: Ridge Ending Orange: Island/Dot Red: Enclosure Purple: Bifurcation Green: Short Ridge |