Which of the following is NOT one of the five categories of evidence?

The correct answer identifies "Witness accounts" as not being one of the five primary categories of evidence. The five categories typically recognized in law enforcement and investigative contexts include substance, trace, comparison, demonstrative, and testimonial evidence.

Substance evidence refers to physical items that can be tested or analyzed, such as drugs or blood. Trace evidence pertains to small quantities of material that can link a suspect to a scene, like hair or fibers. Comparison evidence involves establishing a relationship between known and unknown samples, often done through forensic analysis.

Witness accounts fall under testimonial evidence, which is distinct from the categories that emphasize physical objects or materials. While witness testimony can be valuable in investigations, it is categorized differently from the primary evidential types that rely on physical analysis. Thus, it reinforces the distinction that witness accounts are important but do not fit within the specific scope of the five primary evidence categories.