CSI Latent Print Processing 2

Question 1

Which technique uses a vacuum chamber to deposit metal vapor onto a surface to develop latent prints?

Accepted Answer

Vacuum metal deposition (VMD)

Answer

Small particle reagent

Answer

Cyanoacrylate fuming

Answer

Sudan black

Question 2

What is the primary advantage of using alternate light sources (ALS) before applying chemical developers?

Accepted Answer

ALS can reveal prints without consuming or contaminating them

Answer

ALS permanently fixes the print

Answer

ALS works only on porous surfaces

Answer

ALS replaces the need for photography

Question 3

When processing a wet porous surface such as a rain-soaked document, which reagent is most appropriate?

Accepted Answer

Physical Developer (PD)

Answer

Ninhydrin

Answer

Cyanoacrylate

Answer

Rhodamine 6G

Question 4

Which of the following fluorescent dyes is commonly used after cyanoacrylate fuming to enhance contrast on multi-colored surfaces?

Accepted Answer

Rhodamine 6G

Answer

Luminol

Answer

Leuco crystal violet

Answer

DFO

Question 5

Iodine fuming develops latent prints through which mechanism?

Accepted Answer

Physically absorbing into fatty residues

Answer

Reacting with chloride salts in sweat

Answer

Covalently bonding to amino acids

Answer

Oxidizing sebaceous material

Question 6

A CSI finds a latent print on a knife blade. Which processing sequence is correct?

Accepted Answer

Photography → cyanoacrylate → fluorescent dye

Answer

Cyanoacrylate → powder dusting → photography

Answer

Powder dusting → cyanoacrylate → DFO

Answer

DFO → ninhydrin → cyanoacrylate

Question 7

What does the term 'Level 3 detail' refer to in fingerprint examination?

Accepted Answer

Pore structure and edge morphology of individual ridges

Answer

Ridge flow and pattern type

Answer

Ridge characteristics such as bifurcations and endings

Answer

Scar patterns and general shape