Investigative Planning & Methodology Flashcards

An investigator is planning the examination of a fire scene where rain is forecast within two hours. Which action should be prioritized?

Answer: Expedite exterior photography and protect key evidence areas from weather

Imminent weather that could destroy evidence requires prioritizing exterior documentation and protecting critical evidence areas before conditions change.

Which of the following best describes the role of a 'fire investigation team leader' in a multi-investigator scene?

Answer: Coordinating assignments, maintaining overall methodology, and ensuring scene integrity

The team leader ensures the investigation remains methodologically sound by coordinating roles, maintaining scene integrity, and overseeing overall progress.

When should an investigator consider retaining a fire protection engineer as a consultant during the planning phase?

Answer: When fire behavior or suppression system analysis exceeds the investigator's expertise

Identifying technical knowledge gaps during planning — not after conclusions — ensures specialists are retained early enough to meaningfully contribute.

A fire investigator must prioritize evidence collection at a scene with limited access time. Which category of evidence should be collected FIRST?

Answer: Fragile, perishable, or transient physical evidence most at risk of loss

Transient and perishable evidence — such as trace accelerants, biological material, or weather-exposed items — must be collected before more durable evidence.

Which of the following is a valid reason to STOP an active fire scene examination and reassess the investigative plan?

Answer: New information emerges that significantly contradicts the working hypothesis

When new information substantially contradicts the working hypothesis, the investigator must pause, re-evaluate, and adjust the plan before continuing.

What is the primary purpose of creating a written investigative plan before beginning a complex fire scene examination?

Answer: To ensure methodical, organized data collection and reduce the risk of missing critical evidence

A written plan organizes the examination, assigns responsibilities, and reduces the likelihood of overlooking evidence or key investigative steps.

Which practice best demonstrates adherence to the scientific method when two investigators reach different conclusions about fire origin from the same scene?

Answer: Both investigators document their reasoning and subject their conclusions to peer review and data re-examination

Scientific methodology requires that conflicting conclusions be resolved through transparent documentation, data re-examination, and peer review rather than hierarchy or client preference.