IAAI Certified Fire Investigator (CFI) Practice Test

Documentary evidence is evidence presented in written or recorded form, such as reports, emails, logs, or other records. This type is the best fit because it inherently exists as a document or digital record that can be reviewed, authenticated, and used to support or challenge factual assertions. It provides a tangible trail of information that can be examined independently, which is essential in investigations for establishing timelines, actions taken, and data that can be verified. In contrast, testimonial evidence consists of statements by witnesses (which may be oral or written but are not documents created as records); demonstrative evidence includes visual aids used to illustrate testimony rather than establish facts itself; and physical evidence comprises actual objects found at a scene.