ETC ETC Fingerprint & Biometric Evidence 2

Question 1

Which fingerprint development technique is most appropriate for latent prints on wet evidence?

Accepted Answer

Small particle reagent (SPR)

Answer

Ninhydrin

Answer

Cyanoacrylate fuming

Answer

Standard carbon powder

Question 2

What is the ACE-V methodology used in latent print examination?

Accepted Answer

Analysis, Comparison, Evaluation, and Verification — the scientific method for fingerprint examination

Answer

Acquire, Capture, Enhance, and Verify — the digital imaging process

Answer

Authenticate, Classify, Extract, and Validate — the AFIS search process

Answer

Archive, Catalog, Examine, and Version — the evidence logging system

Question 3

An evidence technician finds a bloody print at a scene. Which technique should be used to enhance it?

Accepted Answer

Amido black or leuco crystal violet staining

Answer

Cyanoacrylate fuming

Answer

Standard fingerprint powder

Answer

Ninhydrin application

Question 4

What is the primary difference between a patent print and a latent print?

Accepted Answer

A patent print is visible to the naked eye; a latent print requires development to be seen

Answer

A patent print is left on paper; a latent print is left on glass

Answer

A patent print is three-dimensional; a latent print is two-dimensional

Answer

A patent print is from a toe; a latent print is from a finger

Question 5

How many points of comparison are required by US federal standards to declare a fingerprint identification?

Accepted Answer

There is no mandated minimum — examiners use a holistic sufficiency standard

Answer

A minimum of 12 points is federally mandated

Answer

A minimum of 8 points is federally mandated

Answer

A minimum of 16 points is federally mandated

Question 6

Which alternate light source wavelength range is commonly used to visualize fluorescent fingerprint powders?

Accepted Answer

Blue-green light (450–530 nm) with orange or yellow goggles

Answer

Red light (600–700 nm) with green goggles

Answer

UV light at 254 nm with no goggles

Answer

Infrared light (900 nm) with standard glasses