forensic science fingerprinting Flashcards
latent fingerprint
invisible to naked eye
patent fingerprint
easily seen (bloody fingerprint, dirt, paint)
plastic fingerprint
impressions in wax clay etc
what percent of population has an arch fingerprint pattern
5
what percent of population has an loop fingerprint pattern
66
what percent of population has an whorl fingerprint pattern
30
Radial Loop opens to the…
THUMB
Ulnar Loop opens to the…
PINKY
Ridge Characteristics are AKA
minutiae
what is a fork in the ridges called
bifurcation
ridge minutae that is the same length on all sides
dot
ridge with opening in the middle
enclosure
ridge with opening in the middle with a dot inside
eye
long ridge that stops
ending ridge
island ridge
short ridge
how to identify latent prints
3 ways
chemical, dusting (magnetic or normal), and UV imaging
types of chemicals
Iodine fuming
silver nitrate
Ninydrin
Cyancrylate
which do you use for POROUS SURFACES
Ninydrin
what is a porous surface
not smooth