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Prints-Forensics
Fingerprinting - Forensics
| Question | Answer |
|---|---|
| When and where was the first known use? | 4000 years ago, China |
| When is the earliest record of the study of pattern on human hands in western culture? | 1684 |
| Describe Loop | one Delta, enter/leave on the same side |
| Describe Whorl | 2 or more Deltas, at least one ridge that makes a full circle |
| Describe Arch | No Deltas, enter/leave on different sides |
| Most common fingerprint pattern? | Loop |
| When and how do fingerprint ridges form? | 10th week of Gestation, the dermal papillae determines the form and pattern of the ridges |
| What makes a fingerprint individual? | the pattern, amount, and location of minutiae |
| Epidermis | outer layer of skin |
| Dermis | inner layer of skin |
| Dermal Papillae | layer of cells between epidermis and dermis |
| What is dactyloscopy? | the study of fingerprint identification |
| What is another word for a fingerprint? | Dartylograms |
| What are minutiae? | the ridge characteristics that make a fingerprint individual |
| Latent Fingerprints | hidden prints that can be made visible with special techniques |
| Patent Fingerprints | visible prints that occur when fingers have a liquid on them |
| Plastic fingerprints | visible, impressed prints that occur when a finger touches a soft, malleable surface, resulting in an indentation |
| Dusting powder | used to show prints on a nonporous surface, reacts with sweat and secreted oils, collected with tape |
| ninhydrin | used to show prints on paper, reacts with amino acids in sweat, turns purple/blue |
| cyanoacrylate (super glue) | used to show prints on glass, plastic, metal and skin. Reacts with amino acids, requires fume hood |
| silver nitrate | used to show prints on wood/styrofoam, reacts with chloride in sweat, can be dipped or sprayed |
| iodine | used to show prints on paper, cardboard, unpainted surfaces. Reacts with heat in a vapor tent/fuming gun, fades/needs to be photographed |
| Most common type of fingerprint collection | dusting for prints |
| When was iafis developed? | 1999 |
| When did NGI replace IAFIS? | 2014 |
| When is included as "Biometrics" in the NGI system? | fingerprints, palm prints, irises, facial recognition |
| Radial Loop | opens toward thumb |
| Ulnar Loop | opens toward pinkie (outside) |
| Plain Arch | enters/exits on opposite sides |
| Tented Arch | spikes in the middle |
| Plain or Central Pocket Whorl | a line drawn between two Deltas, if some of the circular ridges touch the line it is a plain whorl, if no circular ridges touch the line it is a central pocket whorl |
| Accidental Whorl | contain two or more patterns |
| Double Loop Whorl | 2 loops combined into 1 print |
Created by:
elladunmire