CSI - Crime Scene Investigator Latent Print Processing Questions and Answers

Question 1

An investigator is processing a piece of untreated wood found at a crime scene.
Which of the following chemical reagents is most appropriate for developing latent prints on this type of porous surface?

Accepted Answer

Ninhydrin

Answer

Cyanoacrylate Fuming

Answer

Amido Black

Answer

Small Particle Reagent (SPR)

Question 2

A CSI is preparing to use cyanoacrylate fuming to process a plastic bottle for latent prints. To ensure optimal development, which two environmental factors within the fuming chamber are most critical to control?

Accepted Answer

Humidity and Temperature

Answer

Temperature and Air Pressure

Answer

Light and Airflow

Answer

Time and Static Electricity

Question 3

Which of the following describes the primary mechanism by which Small Particle Reagent (SPR) develops latent prints?

Accepted Answer

Fine particles physically adhere to the fatty components of the print residue.

Answer

Reacts with amino acids to form a colored compound.

Answer

Stains protein residues in the print.

Answer

Fumes adhere to moisture and polymerize on the ridges.

Question 4

A CSI must process a ransom note written on standard copy paper. To maximize the chances of developing prints, what is the correct sequence for applying chemical treatments?

Accepted Answer

Iodine Fuming, then DFO, then Ninhydrin

Answer

Ninhydrin, then Cyanoacrylate Fuming

Answer

Physical Developer, then Ninhydrin

Answer

Cyanoacrylate Fuming, then Fingerprint Powder

Question 5

At a crime scene, a CSI finds a vehicle that was recently driven through the rain. A latent print may be present on the wet, painted exterior door. Which processing technique would be most suitable for this situation?

Accepted Answer

Small Particle Reagent (SPR)

Answer

Black Powder Dusting

Answer

Cyanoacrylate Fuming

Answer

Iodine Fuming

Question 6

Thermal paper, such as a store receipt, is a difficult surface for latent print development because processing can cause the entire surface to darken. Which of the following methods has been shown to be effective for developing prints on thermal paper WITHOUT using a chemical solvent?

Accepted Answer

Application of low-temperature heat

Answer

Ninhydrin in Acetone

Answer

Physical Developer

Answer

Amido Black Staining