After a significant fire at a local warehouse, Captain Harris and his team work to control the flames. Once the fire is extinguished, Captain Harris must determine whether a formal investigation by a credentialed fire investigator is necessary. He evaluates the situation, noting that certain elements of the incident suggest it could be a possible crime scene. Understanding the importance of preserving evidence, he considers delaying overhaul operations to allow for a thorough preliminary scene examination while ensuring no contamination of the scene occurs. What should Captain Harris’s primary focus be when making his decision about whether to conduct a formal investigation?