Before moving an appliance suspected to cause a fire, what should an investigator do first?

Photographing and documenting the position of controls and labels is essential because it preserves the evidence of the appliance's condition and arrangement at the scene. This documentation is crucial for the investigation process, as it helps establish the context in which the appliance was found. By capturing details such as control settings and any labels indicating the proper use or safety warnings, investigators can later analyze how these factors may have contributed to the fire incident.

Additionally, having this information allows for a comprehensive review by various experts who may examine the evidence later, ensuring that the investigation remains thorough and objective. This step is vital to maintain the integrity of the investigation and to provide a robust base for any conclusions drawn about the appliance's role in the fire.

Taking photos first not only aids in understanding the appliance's functionality but also preserves visual evidence that could be critical in any potential legal proceedings.