Where should an investigator begin when moving inside the building to continue fire investigation?

An investigator should begin in the area with the least damage because this location often provides critical insights into the fire's origin and the events that led to its development. Starting in least damaged areas allows the investigator to trace the fire's path and gather evidence without being influenced by the destruction that occurred in more severely damaged areas.

This strategy enables them to gather the initial evidence effectively, such as identifying possible ignition sources and examining materials that may have contributed to the fire's growth. By analyzing areas that show less fire impact, the investigator can establish how the fire spread to those heavily damaged regions, fostering a deeper understanding of the fire dynamics and contributing factors.

In contrast, moving directly to the most heavily damaged areas might obscure crucial evidence, as the intense heat and destruction could have altered or destroyed many potential clues about how the fire started and progressed.