Questions and Answers
What does AFIS stand for?
Automated Fingerprint Identification System
What are the 3 fingerprint patterns?
Arch, loops, and whirl
What are the 3 fingerprint types?
Latent, patent, and plastic
What are latent fingerprints?
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What are patent fingerprints?
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What are plastic fingerprints?
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What is the policy for fingerprints?
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What are the 2 surfaces fingerprints can be found on?
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Study Notes
AFIS Overview
- AFIS stands for Automated Fingerprint Identification System, a technology used for identifying individuals based on their unique fingerprint patterns.
Fingerprint Patterns
- Three main fingerprint patterns exist:
- Arch: Represents 5% of fingerprints.
- Loop: Accounts for 60-70% of fingerprints, characterized by its circular or spiral formation.
- Whorl: Constitutes 25-35%, featuring concentric circles.
Types of Fingerprints
- Fingerprints are classified into three types:
- Latent: Invisible to the naked eye; often require enhancement to be visualized.
- Patent: Visible fingerprints that are usually left on a surface.
- Plastic: 3-dimensional imprints, often seen in softer materials like wax or clay.
Latent Fingerprints
- Latent fingerprints are not visible without special techniques—they can be crucial in crime scene investigations.
Patent Fingerprints
- Patent fingerprints are readily observable and can be found on surfaces where substances such as ink or blood are present.
Plastic Fingerprints
- Plastic fingerprints leave a lasting impression in soft materials, making them significant for evidence collection.
Policy for Fingerprints
- The operational policy governing the use and management of fingerprints is known as Ops-50.
Surfaces for Fingerprint Collection
- Fingerprints can be collected from two types of surfaces:
- Smooth: Non-porous surfaces such as glass or metal.
- Porous: Materials that can absorb moisture, such as paper or cardboard.
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Description
Explore the Automated Fingerprint Identification System (AFIS) and learn about the different types of fingerprint patterns, including arches, loops, and whorls. Understand the distinctions between latent, patent, and plastic fingerprints, and their significance in forensic investigations.
