OIC Evidence Collection & Preservation 2

Question 1

When photographing a fire scene for evidence, what is the correct sequence for capturing images?

Accepted Answer

Start at the perimeter and work inward toward the origin

Answer

Start at the area of origin and work outward

Answer

Photograph only the most damaged areas first

Answer

Focus exclusively on structural damage before any other elements

Question 2

Which type of container is MOST appropriate for collecting liquid accelerant samples from a fire scene?

Accepted Answer

Unlined paint cans or glass jars with airtight lids

Answer

Plastic zip-lock bags

Answer

Paper bags

Answer

Cardboard boxes lined with newspaper

Question 3

What is the primary purpose of establishing a chain of custody for collected evidence?

Accepted Answer

To ensure evidence has not been tampered with and is admissible in court

Answer

To speed up laboratory analysis

Answer

To reduce the number of people handling evidence

Answer

To determine the estimated cost of damage

Question 4

A fire investigator finds a suspicious burn pattern on a floor. Before sampling, what should be done first?

Accepted Answer

Photograph and document the pattern in place before disturbing it

Answer

Collect the sample immediately to prevent contamination

Answer

Notify the media of the finding

Answer

Remove surrounding debris to isolate the pattern

Question 5

Which action would MOST likely compromise the integrity of physical evidence at a fire scene?

Accepted Answer

Placing wet debris in sealed plastic bags for extended storage

Answer

Wearing nitrile gloves during collection

Answer

Using a clean, uncontaminated tool for each sample

Answer

Labeling each container before sealing

Question 6

When is a comparison (control) sample collected at a fire scene, and why?

Accepted Answer

From an unburned area similar to the suspect area, collected at the same time, to identify background chemicals

Answer

After the suspect sample to avoid cross-contamination

Answer

Only when requested by a prosecutor

Answer

From the most heavily burned area to compare maximum damage

Question 7

Under Oregon law, when a fire investigator seizes evidence from a private property without a warrant, under what general condition is this typically permissible?

Accepted Answer

When exigent circumstances exist, such as active scene investigation immediately post-fire

Answer

Whenever the investigator believes arson has occurred

Answer

After obtaining verbal consent from a neighbor

Answer

Only if the property is abandoned

OIC Evidence Collection & Preservation 2

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Sources & references