Which item is NOT classified as one of the three primary types of physical evidence?

• A. Biological samples
• B. Impression evidence
• C. Digital data
• D. Trace evidence

Answer: (C)

The main idea is that physical evidence is categorized by tangible objects that can be found and analyzed at a crime scene. The three common tangible categories are biological samples (like blood, semen, or saliva), impression evidence (such as footprints or tool marks), and trace evidence (small particles like fibers, hairs, or glass). Digital data, while essential to investigations, belongs to electronic or digital evidence rather than these traditional physical categories. It’s stored on devices and analyzed with methods specific to cyber forensics, not the physical-evidence framework used for biological, impression, or trace materials.