Fundamentals of Interviewing Credit Hours: 4 Approximate reading time: 2 Hours Approximate online time: 1 Hour You Must Be Signed In To View This Program. Register Today NFPA Documents Disclaimer- NFPA and other resource editions cited within the CFITrainer.Net site were current as of the release of the respective modules. The field of fire investigation and its guiding documents are constantly evolving and it is incumbent upon the fire investigator to remain up to date with the guidance in the current editions of the documents referenced in all modules on CFITrainer.Net, regardless of which edition was used in the writing of the module. Program Abstract This module presents best practices in preparing for and conducting the informational interview with witnesses in the fire investigation case. Interrogation techniques are not part of this module. This module covers how to identify interviewees, how to prepare for the interview, factors that can affect the witness’ statements, best practices in conducting the interview, and the use of visual aids in the interview.