Investigation Procedures & Methods Flashcards

In a complex multi-story building fire investigation, what is the FIRST step an inspector should take upon arriving at the scene?

Answer: Conduct a preliminary exterior survey to assess the overall scene before entry

An exterior survey gives the inspector a safe overview of fire extent, structural hazards, and potential entry points before committing to interior examination.

Which of the following best describes the 'negative corpus' methodology in fire investigation?

Answer: Eliminating all accidental and natural causes until only an incendiary cause remains

Negative corpus is the process of systematically eliminating all other possible causes so that the remaining cause — incendiary — is supported by the elimination of alternatives.

A CPI inspector examines a residential kitchen fire and finds a 'V-pattern' on the wall. What does this pattern primarily indicate?

Answer: The approximate location of the fire's origin or a point where combustion was concentrated

A V-pattern is a classic burn indicator showing where flames originated or concentrated, with the apex pointing toward the area of origin.

What is 'spoliation of evidence' in the context of property loss investigation?

Answer: The loss, destruction, or alteration of evidence that affects its probative value

Spoliation occurs when evidence is destroyed, altered, or lost — whether intentionally or negligently — reducing its usefulness in determining cause.

During a wildfire investigation, an inspector uses the 'V-pattern on vegetation' method. The narrow end of V-patterns in burned grass most commonly points toward:

Answer: The origin or point of ignition

In wildland fire investigation, V-patterns in vegetation with the apex pointing back toward the origin help trace the fire's path back to its starting point.

An investigator is conducting a cause-and-origin investigation and must testify in court. Which standard governs the admissibility of scientific expert testimony in federal courts?

Answer: The Daubert standard

The Daubert standard, established by the U.S. Supreme Court, requires that expert testimony be based on sufficient facts, reliable methodology, and proper application to the case facts.

What is the significance of 'low burn' indicators in a fire scene?

Answer: They may indicate a fire burned longer or hotter near the floor, suggesting a possible accelerant or low ignition point

Low burn patterns suggest fire burned close to the floor level, which may indicate a low ignition point, pooled accelerant, or natural fuel load near the floor.