CSI Unit 2

IAFIS - largest collection of fingerprints in the world

core - found near the center of all loop and whorl patterns

arch - lines start on one side of the print and continue to the other side

whorl - circles that do not exit on either side of the print

loop - lines start on one side of the print, move to center, and leave on same side they started on

delta - triangle shape in all loop and whorl patterns

Primary Henry Classification - each finger gets a number and is counted based on presence of whorls

Secondary Henry Classification - frequency of each fingerprint pattern is used to calculate probability

Visible prints - prints that can be seen with the naked eye

Latent prints - invisible prints

Plastic prints - prints that leave an impression on soap or wax

morphology - form and structure of hair

hair - protein polymers, repeating units, natural or synthetic

cuticle - tough, clear covering of hair shaft

imbricate - broken glass

spinous - bundled spines

coronal - stacked crowns

cortex - middle layer, gives strength and mass and color

keratin - tough protein polymer made up of 20 amino acids

melanin - gives the hair color

medulla - spongy interior

fragmentary - less than half

interrupted - more than half

continuous - all there

stacked - multiple scales, only in animals

human medulla - fragmentary, interrupted, continuous

animal medulla - continuous or stacked

medullary index - d_medulla/d_total

MI for humans - <1/3

MI for animals - >1/2

round - asian or NA

oval - europeo, mexican, mid eastern

crescent moon - african

association - link betwenn unknown sample and known sample

questioned - sample of unknown origin

exemplar - sample of known origin

metabolite - product of a substance formed by chemical processes in the boddy

false positive - hair absorbs chemicals from surroundings

cheiloscopy - study of lip prints

fibers - made up of filaments

textiles - fabrics woven in a distinctive pattern

filaments - twisted together to make a thread or fiber

fabric - woven fibers

synthetic fabric - human-made with spinnerets

natural fabric - from plants or animals

cellulose - plant

protein - animal

mineral - human-made with natural ingredients

yarn - strand of fibers

warp - lengthwise (tall) yarn

weft or woof - crosswise yarn

blend - warp and weft are not same types of fiber

plain - 1-1

twill - 1-2

satin - 1-4

knitted - complex weave