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Finger Printing. What is f inger printing?. A finger print is a mark left behind after the ridges on the fingers, hands, toes or feet touch an object. How they can be left behind. Direct- creates an impression Latent- dirt, sweat, other residue pressed into an object. - PowerPoint PPT Presentation
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Finger Printing
What is finger printing?
• A finger print is a mark left behind after the ridges on the fingers, hands, toes or feet touch an object.
How they can be left behind.
• Direct- creates an impression• Latent- dirt, sweat, other residue pressed into
an object.
3 Basic Patterns of Finger Prints
• 1. Arch• 2. Whorl• 3. Loop
Why it is important in a crime scene.
• If finger prints are found at the scene of a crime, they can be linked back to that certain person which will link them to that crime scene.
3 Techniques used in analyzing Fingerprints.
• 1. Traditional- on paper imprinting. (ink)• 2. Digital- touch pad.• 3. Lifting- oil from hands left behind, captured
by powder placed on dark-light, light=-dark surfaces.
How technology has helped.
• Fingerprints are now stored in a data base on computers. If a finger print is ran through the computer it can be found much faster than the traditional way of finding them.
What is AFIS?
• AFIS (Automated Fingerprint Identification System)- open 24/7 to help police and give them quick results.