CPI Forensic Science & Analysis 2

Question 1

When documenting accelerant burn patterns at a fire scene, which pattern most strongly suggests a liquid accelerant was poured in a trail?

Accepted Answer

Pour pattern or irregular low burn line on the floor

Answer

A pour pattern or irregular low burn line on the floor indicates a liquid accelerant was distributed and ignited along that path.

Question 2

In forensic entomology used during death investigations, the presence of blow fly pupae but no adult flies indicates what about time of death?

Accepted Answer

Death occurred several days to weeks ago

Answer

Pupae represent a later development stage, suggesting death occurred days to weeks prior, as eggs hatch and larvae develop before pupation.

Question 3

A CPI inspector finds charring that is deepest at floor level with minimal ceiling damage. This pattern most suggests:

Accepted Answer

A slow-burning, low-point fire origin possibly involving accelerants

Answer

Deep charring concentrated at floor level with limited ceiling involvement suggests a slow, low-burning fire, which may indicate an accelerant used at floor level.

Question 4

Which chemical test is commonly used in the field to presumptively identify the presence of blood at an inspection scene?

Accepted Answer

Luminol or Kastle-Meyer test

Answer

Luminol (chemiluminescence) and the Kastle-Meyer test (phenolphthalein) are standard presumptive tests for blood detection.

Question 5

When analyzing a questioned document for ink dating, which laboratory technique examines the chemical degradation of ink over time?

Accepted Answer

Thin-layer chromatography (TLC)

Answer

Thin-layer chromatography separates ink components to analyze their chemical composition and degradation, helping establish the approximate age of ink.

(CPI) Certified Professional Inspector Practice Test

(CPI) Certified Professional Inspector Practice Test

CPI Forensic Science & Analysis 2