Fire Cause and Origin Determination develops the skills used to establish where a fire started and what caused it. The course covers sources of ignition and the investigation of structure fires, grass and wildland fires, vehicle and marine fires, and electrical causes; fire behavior as the basis for reading a scene; fire patterns and scene reconstruction; evidence collection and documentation; the motives of fire setters; and the methods used to distinguish an accidental fire from an intentionally set one.
Within the SCNS taxonomy, FFP is the Fire Fighting and Protection prefix. This course sits in the second year of an A.S. in Fire Science, after fire behavior and building construction, and it is one of the courses that carries direct certification value — it meets requirements toward Florida State Fire Marshal arson investigator certification. It appears at approximately four Florida institutions.
The intellectual core is the discipline of working backward from effects to cause without deciding the answer first. Fire investigation has an uncomfortable history precisely because that discipline was often absent, and the modern methodology exists as a corrective.
Fire investigation is numbered inconsistently across Florida to an unusual degree:
SCNS equivalency does not cross numbers, and neither the suffix nor the level is decoration. All these courses teach substantially the same subject at 3 credits, but they are formally different courses, and one is a year lower in the curriculum. For a firefighter accumulating credit toward a degree and toward state certification simultaneously, this matters: verify with the receiving institution and with the State Fire Marshal's office separately, because college credit and certification credit are tracked by different bodies and one does not imply the other.
Fire investigation is unusual among applied disciplines in having formally repudiated a body of its own former teaching, and students should understand why rather than simply learning the current rules.
For decades, investigators were taught that certain visible artifacts were reliable indicators of an accelerant-fueled, intentionally set fire — "alligatoring" of charred wood, crazed window glass, spalled concrete, and low burn patterns or "pour patterns" on floors. Subsequent fire research demonstrated that these artifacts are produced routinely by ordinary accidental fires, particularly after flashover, when a compartment's contents ignite and burn patterns throughout the room converge on an appearance that used to be read as evidence of a poured liquid.
The consequences were not academic. People were convicted of arson, some in capital cases, on the basis of indicators now known to be invalid, and a number of those convictions have since been overturned. NFPA 921 exists in large part as the corrective, and the field's shift to requiring a documented, hypothesis-testing methodology follows directly from it.
What a student should carry away: an investigator's confidence is not evidence. The correct professional posture is to develop hypotheses, actively attempt to disprove them, and be willing to classify a cause as undetermined — which NFPA 921 explicitly contemplates and which inexperienced investigators avoid because it feels like failure. It is not; a defensible "undetermined" is far better than an indefensible determination.
NFPA 921 identifies expectation bias and confirmation bias by name as threats to a valid investigation, which is unusual for a technical standard and tells you how serious the problem is. The mechanism is ordinary: an investigator is told on the way to the scene that the owner was in financial trouble, or that a neighbor saw someone leave, and thereafter reads ambiguous physical evidence in light of that. Everything found afterward confirms it.
The methodological defense taught in this course is to establish origin and cause from the physical evidence first, before absorbing witness accounts or motive information, and to document the sequence. The related discipline is negative corpus: NFPA 921 warns against concluding a fire was incendiary merely because accidental causes were eliminated. Absence of an identified accidental cause is not affirmative evidence of arson — a distinction that has decided real cases.
Constitutional constraints apply to fire scenes, and getting them wrong can suppress evidence and end a prosecution. The governing principles come from Michigan v. Tyler and Michigan v. Clifford: firefighters may enter to extinguish a fire and may remain for a reasonable time afterward to determine its cause, but once that period ends, a return entry to search generally requires consent, an administrative warrant, or a criminal search warrant — and once the investigation becomes criminal in focus, a criminal warrant is the appropriate instrument.
Two practical implications. Document entry times and the basis for each entry. And be alert to the moment an origin-and-cause inquiry becomes a criminal investigation, because the legal requirements change at that point, including obligations toward a suspect who is being interviewed. In Florida, coordination with the Bureau of Fire and Arson Investigations and with local law enforcement is the normal path; investigative authority and sworn status vary by jurisdiction, so know what your own position actually authorizes.
Fire investigators work in structures that have burned and often partially collapsed, after the emergency has ended and the sense of urgency has gone.
This course carries direct professional value: it meets requirements toward Florida arson investigator certification, administered through the Division of State Fire Marshal and the Bureau of Fire Standards and Training. The corresponding state syllabus is BFST2610, Fire Investigation Origin and Cause.
College credit and state certification are tracked separately and neither implies the other. A student may complete FFP2604 for degree credit and still need to satisfy the Fire Marshal's requirements — or vice versa. Confirm both, in writing, with the college and with the State Fire Marshal's office. Beyond the state credential, the IAAI Certified Fire Investigator (CFI) and the NAFI CFEI are the recognized professional credentials, and NFPA 1033 defines the qualification standard both build on. Certification requirements are amended periodically; verify current requirements rather than relying on this guide.
FFP2604 is a lecture course, 3 credits and approximately 45 contact hours, consistent with this repository's entire published FFP family and with the 3-credit values published by FSW, Valencia, and Gulf Coast for their equivalents. Institutions using the C-suffixed form (Valencia's FFP2610C, at 2 lecture + 1 lab) add a scene-practical component and will report more contact hours. Expect case studies, scene photograph interpretation, evidence handling exercises, report writing, and — in the better sections — a burn cell or mock scene practical.
The first digit of an SCNS number denotes the year of offering, not transferability. Courses at the 1000 and 2000 levels transfer transparently between Florida public institutions, and 3000 to 4000 is unproblematic since both are upper division. The boundary that actually matters is 2000 to 3000, where lower-division credit generally cannot satisfy an upper-division requirement.
Fire science A.S. programs are applied degrees; they do not carry the A.A.'s guaranteed junior-status transfer into the state university system. Students planning a bachelor's in fire science, emergency management, or public administration should discuss the pathway with an advisor early. Note also that many Florida fire departments provide tuition support and incentive pay for degree completion — worth asking about before paying out of pocket.
Generated September 2, 2026 · Updated September 2, 2026