History of fingerprints
Who was the first person to classify fingerprints?
Sir Frances Galton
What three powders can be used to “lift” latent fingerprints?
carbon, metal and magnetic
How big is a nanoparticle?
1 to 100 nanometers
What makes up a fingerprint?
Dermals
What is a fingerprint?
Prints that your fingers leave
Who created the first known fingerprinting system in the 14th century?
Joao De Barros
What is used to preserve fingerprints that have been “lifted”?
tape
How many scientists were tested in 1995? And how many of them made at least one false identification?
156 scientists, 1 out of 5 made a mistake
What are the marks that dermals leave called?
Fingerprints
What are latent fingerprints?
Invisible fingerprints
What did Babylon use fingerprints to protect from?
Forgery
What do you do to lifted fingerprints before collection?
Photograph them
How much time can it take for a fingerprint match?
4 months
What are the three types of fingerprints? and what percentage of the population has those types of fingerprints?
Loops 65%, whorls 30%, arches 5%
What are patent fingerprints?
Visible fingerprints
Who had their fingerprints taken in Babylon?
Criminals
What powder is easier to clean up?
metallic and magnetic powder
How many criminal fingerprint cards did the FBI have in 1995?
23 million
How are patent, plastic, and latent fingerprints made?
Patent: left on smooth surface cause by blood, ink or some other liquid comes in to contact with the hands and is transferred to the surface plastic: indentations that are left on a soft surface latent: transfer of oil and other body secretions onto the surface
What are plastic fingerprints?
Indentations that are left on soft surfaces
What were the three uses that ancient China had for fingerprints?
o authenticate official seals and documents, to authenticate documents to settle disputes later and trade deals
What is now added to fingerprint powders?
Nanoparticles
How were fingerprints analyzed before computers and scanners?
People compering ridge patterns and minutiae points
What are the body surfaces that are covered in ridges?
Fingers, toes, feet and palms
What are dermals? And what are they used for?
A portion/ unit of the skin, dermals are used for gripping surfaces