Chapter 9: Basic CSP Skills Flashcards
3 types of fingerprints
visible, invisible, plastic
friction ridge skin
does not exude oil
myths of latent prints
every time you touch an object you leave a latent print; every latent print is identifiable
hard, nonabsorbent surfaces
powders or super glue fuming
absorbent surfaces
one or more specific chemicals
515
orange goggles
455
yellow goggles
555
red goggles
fingerprint card
initials, date, location of prints, direction orientation, type of powder
2-D impressions
length, width (electrostatic)
3-D impressions
length, width, depth (casting)
silicone/rubberized casting
toolmarks
gelatin/other adhesive lifters
2-D footprints, tire tread, fingerprints
2 lbs casting material
9 oz./260 mL water
allow cast to harden for
30-40 mins
charging plate
1 inch from mylar film
most important tool used by crime scene technician
clean white light
reflected light
defines color
absorbed light
black; all colors absorbed
transmitted light
passes through
converted light
undergo fluorescence, otherwise impossible to see
wearing goggles
eliminates the original wavelength, leaving only converted light energy
imprints in ones hands of weapons used
can be seen for as long as 5 days after the fact with ALS
ALS safety issues
equipment is fragile and expensive, cool down of lamp, safety for eyes
