Tо prоperly plаn the interviews thаt will be cоnducted during а fire investigation, the fire investigator must establish the goals for the interviews, including all of the following: Gathering pertinent and acurate information, obtaining information that corroborates or refuses the investigative data available, identify ignition sequence factors, assisting in the determination of the fire origin and cause determination or who may be resposible for causing the fire.