What Attorneys Need to Know About Fire Investigation Reports

For attorneys handling fire loss litigation in Nebraska, Iowa, or elsewhere in the Midwest, the fire investigation report is often the most critical piece of evidence in the case. Whether you represent the insured, the insurer, a subrogation target, or a defendant in a criminal matter, your ability to evaluate, challenge, or support the fire investigator's conclusions can determine the outcome.

This guide provides a practical framework for understanding fire investigation reports and using them effectively in legal proceedings.

The Structure of a Fire Investigation Report

A well-prepared fire investigation report generally follows a consistent structure, though formats may vary between investigators and agencies. Understanding each section allows attorneys to quickly identify strengths and weaknesses.

Background and Assignment

This section identifies who retained the investigator, the scope of the assignment, and the date and circumstances of the fire. Pay close attention to when the investigator was retained relative to the fire date. Delays in scene examination can result in evidence loss due to weather, demolition, or contamination, and this is a common point of challenge.

Scene Documentation

The report should describe the investigator's scene examination in detail, including the condition of the structure, the extent of damage, and the methodology used to process the scene. Look for comprehensive photographic documentation, diagrams, and systematic documentation of burn patterns and physical evidence.

A report that lacks thorough scene documentation raises immediate credibility concerns. The investigator should be able to demonstrate that they examined the entire scene, not just the area they concluded was the origin.

Origin Determination

The origin section is where the investigator presents their analysis of where the fire started. This should include a discussion of burn patterns, fire dynamics, witness statements, and any other evidence that supports or eliminates potential origin areas.

Key questions to ask:

• Does the investigator explain how they identified the area of origin?
• Are alternative origin areas discussed and eliminated?
• Is the origin determination consistent with the physical evidence described elsewhere in the report?
• What level of confidence does the investigator assign to their origin determination?

Cause Determination

The cause section identifies the specific mechanism of ignition. This is where the investigator should apply the scientific method most rigorously, considering all potential causes and systematically eliminating those that are not consistent with the evidence.

Key questions to ask:

• Does the report identify all potential ignition sources in the area of origin?
• Is each potential cause evaluated against the physical evidence?
• Are eliminated causes supported by evidence, or are they dismissed without adequate explanation?
• Does the surviving cause have positive evidence supporting it, or is it simply the last cause standing after a process of elimination?

A cause determination based solely on negative corpus, meaning the investigator eliminated all other causes and concluded the remaining possibility must be the cause without affirmative evidence, is vulnerable to challenge under Daubert and similar evidentiary standards.

Supporting Evidence and Laboratory Analysis

Reports may reference laboratory results, electrical component examinations, appliance testing, or other forensic analyses. Review these sections carefully. Laboratory reports should come from accredited facilities, and the chain of custody for submitted evidence should be clearly documented.

Evaluating the Investigator's Qualifications

An investigator's qualifications directly affect the admissibility and weight of their opinions. When reviewing a report, examine the investigator's credentials, including:

• Certifications: The IAAI Certified Fire Investigator (CFI) designation is the most widely recognized credential. Some investigators also hold certifications from NAFI or other organizations.
• Training: Ongoing training in fire dynamics, NFPA 921 methodology, and related disciplines is essential. The field evolves, and investigators who rely on outdated training may apply discredited methodologies.
• Experience: Depth and breadth of experience matter. An investigator who has examined hundreds of fire scenes brings practical knowledge that supplements formal training.
• Testimony history: An investigator's track record in depositions and trial testimony provides insight into how they will hold up under cross-examination.

Common Weaknesses in Fire Investigation Reports

Attorneys should be alert to several recurring issues that undermine the reliability of fire investigation reports.

Failure to Follow NFPA 921

NFPA 921, Guide for Fire and Explosion Investigations, is the standard of care for the profession. An investigation that deviates from NFPA 921 methodology is vulnerable to challenge. Common deviations include relying on outdated indicators such as "crazed glass" or "alligator charring" as evidence of accelerant use, failing to consider all potential causes, and reaching conclusions that are not supported by the physical evidence.

Confirmation Bias

Investigators who form a conclusion early and then seek evidence to support it, rather than following the evidence to a conclusion, produce unreliable reports. Look for signs that the investigator approached the scene with a predetermined theory, such as failing to document evidence that contradicts their conclusion or ignoring witness statements that do not fit their narrative.

Insufficient Documentation

A report that relies heavily on the investigator's narrative without supporting photographs, diagrams, and measurements is difficult to verify and easy to challenge. The best reports allow the reader to independently evaluate the evidence and reach their own conclusions.

Overstatement of Conclusions

Investigators who express absolute certainty in cases where the evidence supports only a probable conclusion are overstating their findings. NFPA 921 recognizes that not all fires can be definitively determined, and an investigator who never classifies a fire as "undetermined" may be reaching conclusions the evidence does not support.

Using Fire Investigation Reports in Litigation

Deposing the Fire Investigator

When deposing an opposing fire investigator, focus on methodology. Did they follow NFPA 921? Can they articulate how they eliminated alternative causes? Do their conclusions follow logically from the evidence they documented? A methodological challenge is more effective than attacking the investigator's credentials.

Retaining Your Own Expert

In contested fire cases, retaining an independent fire investigation expert to review the opposing report and, if possible, conduct an independent scene examination is often essential. An experienced origin and cause specialist can identify methodological flaws, offer alternative interpretations of the evidence, and provide testimony that presents a competing narrative to the jury.

Daubert and Admissibility

Fire investigation testimony is subject to Daubert challenges in federal court and in states that have adopted the Daubert standard. Nebraska follows the Daubert framework, making it critical that any expert you rely on or face can demonstrate that their methodology is scientifically valid, has been tested, is subject to peer review, and is generally accepted in the fire investigation community.

Building a Stronger Case

The fire investigation report is the foundation of any fire loss case, but it is not the only evidence. Utility records, building permits, maintenance records, insurance applications, and witness statements all contribute to the overall picture. Attorneys who understand how to read and evaluate the investigation report are better positioned to integrate all of these sources into a compelling case theory.

For fire litigation matters in Nebraska, Iowa, and across the Midwest, the quality of the fire investigation often determines the quality of the outcome. Investing the time to critically evaluate the report, and engaging qualified experts when needed, is the most effective strategy for achieving a favorable result.