What does an absence of a V pattern in fire debris indicate?

The absence of a V pattern in fire debris suggests that an accelerant could have been used. In fire investigation, a V pattern is typically formed when a fire burns with intensity in a specific direction and angle, often indicating the point of origin. When this pattern is not present, it raises the possibility that the fire spread uniformly or lacked a concentrated source, which can happen when an accelerant has been introduced. Accelerants can cause a fire to spread more evenly, resulting in a lack of a directional burn pattern. Thus, while the absence of a V pattern doesn't definitively confirm the use of an accelerant, it strongly indicates that it could have played a role in the fire's behavior.