CFP Forensic Photographer Lighting Techniques & Digital Processing 3

Question 1

A photographer must document a fingerprint developed with fluorescent powder. After exciting it with an ALS, why must the exposure typically be increased?

Accepted Answer

Fluorescent emission is much dimmer than reflected light

Answer

Fluorescence emits far less light than normal reflection, so longer exposures or wider apertures on a tripod are usually required.

Question 2

Which technique best documents an indented writing impression on a notepad recovered from a suspect's desk?

Accepted Answer

Oblique lighting raked across the page at a low angle

Answer

Low-angle oblique light casts shadows into the shallow indentations, making the impressed writing legible.

Question 3

When photographing through a vehicle windshield to capture interior blood spatter, which accessory most effectively reduces reflections?

Accepted Answer

A circular polarizing filter rotated to cancel the glare

Answer

A polarizing filter can be rotated to block polarized reflections off glass, revealing detail behind the surface.

Question 4

Under SWGDE/SWGIT guidance, which digital processing action on evidentiary images is generally considered unacceptable?

Accepted Answer

Cloning or content-aware removal of visual elements from the image

Answer

Removing or adding image content alters the factual record, unlike documented global adjustments that only improve visibility.

Question 5

Why should the original memory card image files be write-protected and hashed immediately after a scene is photographed?

Accepted Answer

To establish integrity and prove images were not altered after capture

Answer

A cryptographic hash of the originals establishes a verifiable baseline proving no post-capture alteration occurred.

(CFP) Certified Forensic Photographer Practice Test

(CFP) Certified Forensic Photographer Practice Test

CFP Forensic Photographer Lighting Techniques & Digital Processing 3