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Fingerprint Analysis and Classification: A Practical Guide

Learn how to calculate your Primary and Secondary Henry Classification by assigning point values for each fingerprint pattern type. Improve your probabilities with more specific percentages and identify prints using minutiae or triradius activity. Practice fingerprint matching with the Key to Fingerprint Matching Worksheet.

cynthiaallen
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Fingerprint Analysis and Classification: A Practical Guide

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  1. Fingerprint Images Forensics Mr. Foster

  2. LOOP WHORL ARCH

  3. CalculatingPrimary Henry Classification Each Finger is given a point value

  4. right right left left left index ring thumb middle little + 1 = right right right left left thumb middle little index ring + 1 Calculate your Primary Henry Classification Assign the number of points for each finger that has a whorl and substitute into the equation: 16 + 8 + 4 + 2 + 1 16 + 8 + 4 + 2 + 1 Only add the number if you have a whorl on the finger!

  5. There are more than 3 pattern classifications. Right hand Ulnar Right hand Radial

  6. thumb side Pinky side

  7. More specific %’s for categories of each pattern type

  8. Fingerprint Lab and Probability Secondary Henry Classification 2. What would happen to your probabilities if you incorporated the more specific %’s?

  9. Minutiae Or Triradius

  10. Activity #2 Identify 1-15

  11. Activity #3- look at the handout and identify prints that came from the same finger.

  12. KEY

  13. Key to Fingerprint Matching Worksheet • A = G = S This one is interesting; there are three separate impressions of the same finger with some very unique features. • B = no match • C = no match • D = no match • E = T • F = J • H = R • I = no match • K = O • L = no match • M = P • N = Q

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