ETC ETC Fingerprint & Biometric Evidence 3

Question 1

What type of fingerprint is formed when a finger presses into a soft material such as wax or putty, leaving a three-dimensional impression?

Accepted Answer

Plastic (impression) print

Answer

Patent print

Answer

Latent print

Answer

Inked print

Question 2

When photographing a developed latent fingerprint, what must always be included in the frame?

Accepted Answer

A scale ruler placed adjacent to the print

Answer

The evidence technician's badge number

Answer

The full crime scene in the background

Answer

A color calibration chart only

Question 3

What is the delta in a fingerprint pattern?

Accepted Answer

A triangular ridge formation that marks a divergence of ridges, used as a reference point in classification

Answer

The central core of a whorl pattern

Answer

A bifurcation minutiae point

Answer

The outer perimeter ridge line

Question 4

Which chemical method uses the ninhydrin reaction to develop latent prints on paper documents in a dry environment?

Accepted Answer

Ninhydrin dip or spray followed by gentle heat application

Answer

Superglue fuming in a sealed chamber

Answer

Sudan black immersion bath

Answer

Rhodamine 6G under alternate light source

Question 5

Evidence technicians may be asked to obtain inked fingerprints from a deceased person. Which technique is used when skin is wrinkled or decomposed?

Accepted Answer

Tissue builder injection or rehydration using softening solutions prior to inking

Answer

Standard ink card rolling without modification

Answer

Luminol enhancement on the body

Answer

Casting with dental stone

Question 6

What is the chain of custody requirement when submitting lifted fingerprint cards to the laboratory?

Accepted Answer

Each person who handles the lift must sign and date, documenting the transfer to maintain an unbroken chain

Answer

Only the submitting officer needs to sign the lift card

Answer

The chain of custody only applies to physical objects, not lift cards

Answer

Lift cards are exempt from chain of custody because they are copies