Module 3 (Fingerprint & Tattoos) Flashcards
What is theory of exchange and who wrote it?
Edmonce Locard. This theory states that everything leaves a trace. When two objects come in contact with one another, each will take something from another or leave something behind
When are fingerprints determined in the fetus?
4th gestational month
Most common pattern of fingerprints? (Look at your hand)
Loops
How ou fingerprints classified?
Based on delta and core
What is delta?
It is the formation of a triangle due to 3 ridges (lines) in different arrangement
Which pattern has no delta?
Plain arch
What are the methods of enhancing fingerprints ?
Using light, dusting, chemicals
What light is used to make fingerprints visible?
Ultraviolet spectrum
White light
What dusting methods are used to make fingerprints visible?
Lead dust,
charcoal,
aluminium or chalk powder
mercury
What chemicals are used to make fingerprints visible?
Ninhydrin
Cyanoacrylate fuming
Silver nitrate
What is the depth upto which satisfactory fingerprints can be obtained ?
0.6mm
Which disease causes lack of fingerprints?
Dermatopathia pigmentosa reticularis
What is edgeoscopy?
Method of identification using edges of fingerprint ridges
How to visualise faded tattoo?
Ultraviolet, infrared, magnifying glass
