The 1st determined procedure was published in 1955 (Straeter and Crawford 1955). The authors said that “fire leaves its fingerprints and that every finger of flame leaves its results plus the review of such outcomes can help you decide on the spot where it burned first” (Straeter and Crawford 1955). https://emilianokzpdq.uzblog.net/facts-about-fire-investigation-services-revealed-40990055