This program is designed to demonstrate attendee that a comprehensive, thorough, and systematic examination of every fire scene in accordance with NFPA 921 is of paramount importance and that the investigator conducting that fire scene exam needs to adhere to and be qualified to conduct that investigation per NFPA 1033 and NFPA 1037, the accepted standards for a fire investigator and fire marshal. From beginning to end, the investigator must have a process in hand that facilitates the investigation of the entire scene, no matter how large or how small, and that allows for the proper documentation of that scene, the correct elimination or attribution of the heat source responsible for the fire, and the accurate determination as to the area or point of origin of the fire. The presentation will also detail the preparation of a viable investigative report, which will memorialize an accurate record of the investigation for use later in either a departmental, civil, or criminal process or proceeding. It has been updated to newly published editions of NFPA 921, Guide for Fire and Explosion Investigations 2021, and NFPA 1033, Standard for Professional Qualifications for Fire Investigator 2022, in addition to changes to the original NFPA 1037, Standard for Professional Qualifications for Fire Marshal, which is now included in the new consolidated NFPA 1030 (2024) document. Of significant interest to all fire investigators is the soon to be released NFPA 1321, Standard for Fire Investigation Units, slated for 2024, which will significantly impact all fire investigators and all fire investigation units.