What is toolmark analysis?

• A. Analysis of handwriting patterns.
• B. Calibration of measurement instruments.
• C. Examination of marks left by tools on surfaces.
• D. Analysis of footprints in soil.

Answer: (C)

Toolmark analysis examines the marks left by tools when they contact surfaces. When a tool such as a blade, screwdriver, chisel, or drill engages a material, it creates distinctive marks—scratches, gouges, or impressions—that reflect the tool’s unique shape, edge geometry, manufacturing flaws, and wear. Forensic examiners use microscopes and comparison techniques to determine whether marks on a surface could have been produced by a specific tool, and to distinguish those marks from random surface damage or other types of markings. This approach helps link a tool to a crime scene item or rule it out as the source. Handwriting analysis, calibration of measurement instruments, and footprints in soil involve different kinds of evidence and are not about the physical marks a tool leaves on surfaces.