CFP Technology & Tools 3

Question 1

Infrared (IR) photography is most useful in forensic work for which application?

Accepted Answer

Revealing gunshot residue patterns and obliterated writing on dark fabrics or documents

Answer

IR penetrates or differentiates materials like GSR, inks, and blood on dark surfaces that look uniform in visible light.

Question 2

Ultraviolet (UV) reflectance photography is commonly used to document which type of evidence?

Accepted Answer

Bite marks and healed bruising on skin

Answer

UV reflectance reveals surface-level skin injuries such as bite marks and old bruises that are faint in visible light.

Question 3

A photographer uses focus stacking software on a series of cartridge case images. What problem does this technique solve?

Accepted Answer

Shallow depth of field at high magnification

Answer

Focus stacking combines multiple images focused at different depths to produce one image sharp throughout, overcoming macro depth-of-field limits.

Question 4

Which storage practice best preserves the integrity of original digital images from a crime scene?

Accepted Answer

Write-protect and archive the original files unaltered, working only on duplicates

Answer

Preserving unaltered originals and performing all processing on copies maintains the evidentiary chain and authenticity.

Question 5

What does a hash value (e.g., MD5 or SHA-256) generated at the time of image acquisition provide?

Accepted Answer

A digital fingerprint verifying the file has not been altered

Answer

A cryptographic hash uniquely identifies the file's exact contents, so any later change produces a different hash and proves alteration.

(CFP) Certified Forensic Photographer Practice Test