FIS 201 Exam 3 study guide questions
well answered (verified)
- correct answer ✔✔*Describe how one might tell if a firearm was accidentally discharged*
sebum and sweat are secreted by pores and spread along ridge surface; these secretions stick to
substrate when pressed, resulting in an impression of the print - correct answer ✔✔How does
skin produce fingerprints?
on the soles of feet, toes, fingertips, and palms for grip - correct answer ✔✔Where are friction
ridges found?
volar pads begin forming at 4 months of gestation - correct answer ✔✔When do friction ridges
appear?
sweat and sebum are secreted by pores and spread along the ridge surface, which allows a
fingerprint to be transferred onto a surface - correct answer ✔✔What are the secretions that
allow fingerprints to be transferred onto a surface?
exemplar fingerprints are created using Livescan - a laser is run across the hand on a surface;
rolled ink - inked finger rolled on paper from nail to nail, gives complete coverage of fingerprint
pattern - correct answer ✔✔How are exemplars created?
voluntary submission from children for anti-kidnapping purposes; fingerprints collected when
arrested and booked into system; individuals who are teachers, pilots, etc. get their fingerprints
recorded into the system - correct answer ✔✔How are exemplars collected?
,On nonporous & semiporous substrates - fats and sebums sitting on top of substrates; door
frames and handles, windows, furniture, appliances; used on objects that cannot be taken back
to the lab - correct answer ✔✔Where should you use the dusting method?
fats & oils - correct answer ✔✔What component of fingerprints do powders adhere to?
a light brush and a contrasting colored powder is lightly dusted over the print and powder will
stick to the fats and oils in the print; - correct answer ✔✔What are the steps of dusting for
latent fingerprint development?
on porous substrates; paper, on faint blood prints - correct answer ✔✔Where should ninhydrin
be used?
amino acids - form Ruhemann's Purple - correct answer ✔✔What component of fingerprints
does Ninhydrin adhere to?
on nonporous substrates; on degraded or fragile prints; on prints on a brightly colored
background - correct answer ✔✔Where should cyanoacrylate fuming be used?
fats in the presence of water - correct answer ✔✔What component of fingerprints does
Cyanoacrylate fumes adhere to?
on clear tape; turns fats purple - not good contrast for darker colored tape - correct answer
✔✔Where should you use Gentian Violet?
on electrical tape; good for darker colored tape; adheres to fats in fingerprint and in contrasting
colors - correct answer ✔✔Where should you use Sticky Side & wet wop?
1. dust - fingerprints become visible
, 2. lift with a squashy material; mikrosil or diff lift - correct answer ✔✔How should textured
surfaces be processed for fingerprints?
on porous and nonporous substrates for a blood print - correct answer ✔✔Where should you
use Leucocrystal Violet?
hemoglobin - correct answer ✔✔What does Leucocrystal Violet react with?
Amido black, coomassie blue, or Hungarian Red; not specifically hemoglobin but general
proteins; which you use depends on the color for max contrast - correct answer ✔✔What
should be used for protein reactive/nonporous substrates?
sticky-side powder, Gentian Violet (particularly this one since it's clear) - correct answer
✔✔What method would be appropriate for developing fingerprints on a piece of clear packing
tape?
leucocrystal violet - correct answer ✔✔If you believe you have a bloody fingerprint on a Post-it,
one appropriate development reagent would be
collect and process it with cyanoacrylate fuming in the lab; nonporous, so ninhydrin wouldn't
work, small enough to take to lab - correct answer ✔✔How would you process a water bottle
found at a crime scene for prints?
Rashid - al-Din Hamadani, 1300 - correct answer ✔✔Who wrote that "experience shows that no
two individuals have fingerprints exactly alike" and observed that fingerprints are unique?
William Herschel, circa 1860 - correct answer ✔✔Who begins fingerprinting Indian workers as a
means of identification?
well answered (verified)
- correct answer ✔✔*Describe how one might tell if a firearm was accidentally discharged*
sebum and sweat are secreted by pores and spread along ridge surface; these secretions stick to
substrate when pressed, resulting in an impression of the print - correct answer ✔✔How does
skin produce fingerprints?
on the soles of feet, toes, fingertips, and palms for grip - correct answer ✔✔Where are friction
ridges found?
volar pads begin forming at 4 months of gestation - correct answer ✔✔When do friction ridges
appear?
sweat and sebum are secreted by pores and spread along the ridge surface, which allows a
fingerprint to be transferred onto a surface - correct answer ✔✔What are the secretions that
allow fingerprints to be transferred onto a surface?
exemplar fingerprints are created using Livescan - a laser is run across the hand on a surface;
rolled ink - inked finger rolled on paper from nail to nail, gives complete coverage of fingerprint
pattern - correct answer ✔✔How are exemplars created?
voluntary submission from children for anti-kidnapping purposes; fingerprints collected when
arrested and booked into system; individuals who are teachers, pilots, etc. get their fingerprints
recorded into the system - correct answer ✔✔How are exemplars collected?
,On nonporous & semiporous substrates - fats and sebums sitting on top of substrates; door
frames and handles, windows, furniture, appliances; used on objects that cannot be taken back
to the lab - correct answer ✔✔Where should you use the dusting method?
fats & oils - correct answer ✔✔What component of fingerprints do powders adhere to?
a light brush and a contrasting colored powder is lightly dusted over the print and powder will
stick to the fats and oils in the print; - correct answer ✔✔What are the steps of dusting for
latent fingerprint development?
on porous substrates; paper, on faint blood prints - correct answer ✔✔Where should ninhydrin
be used?
amino acids - form Ruhemann's Purple - correct answer ✔✔What component of fingerprints
does Ninhydrin adhere to?
on nonporous substrates; on degraded or fragile prints; on prints on a brightly colored
background - correct answer ✔✔Where should cyanoacrylate fuming be used?
fats in the presence of water - correct answer ✔✔What component of fingerprints does
Cyanoacrylate fumes adhere to?
on clear tape; turns fats purple - not good contrast for darker colored tape - correct answer
✔✔Where should you use Gentian Violet?
on electrical tape; good for darker colored tape; adheres to fats in fingerprint and in contrasting
colors - correct answer ✔✔Where should you use Sticky Side & wet wop?
1. dust - fingerprints become visible
, 2. lift with a squashy material; mikrosil or diff lift - correct answer ✔✔How should textured
surfaces be processed for fingerprints?
on porous and nonporous substrates for a blood print - correct answer ✔✔Where should you
use Leucocrystal Violet?
hemoglobin - correct answer ✔✔What does Leucocrystal Violet react with?
Amido black, coomassie blue, or Hungarian Red; not specifically hemoglobin but general
proteins; which you use depends on the color for max contrast - correct answer ✔✔What
should be used for protein reactive/nonporous substrates?
sticky-side powder, Gentian Violet (particularly this one since it's clear) - correct answer
✔✔What method would be appropriate for developing fingerprints on a piece of clear packing
tape?
leucocrystal violet - correct answer ✔✔If you believe you have a bloody fingerprint on a Post-it,
one appropriate development reagent would be
collect and process it with cyanoacrylate fuming in the lab; nonporous, so ninhydrin wouldn't
work, small enough to take to lab - correct answer ✔✔How would you process a water bottle
found at a crime scene for prints?
Rashid - al-Din Hamadani, 1300 - correct answer ✔✔Who wrote that "experience shows that no
two individuals have fingerprints exactly alike" and observed that fingerprints are unique?
William Herschel, circa 1860 - correct answer ✔✔Who begins fingerprinting Indian workers as a
means of identification?
