1. Tool Marks
Chapter 16

2. Tool Mark
Any impression, scratch, or abrasion made when contact occurs between a tool and an object

3. Tool Mark Impressions – 3 Categories
Indention Marks – marks or impressions made by a tool when pressed against a softer surface. (ex. Crowbar, screwdriver, chisel, hanner)

4. Tool Mark Impressions – 3 Categories
Abrasion Marks – made when surfaces slide across one another. The harder surface leaves scratch marks on the softer surface (ex. Pliers, knives, axes, or gun barrels)

5. Tool Mark Impressions – 3 Categories
Cutting Marks – produced along the edge as a surface is cut. (Ex. Saws, wire cutters, bolt cutters)
Cutting marks on bones – the type of saw used to dismember a body can be determined by examining the cut surface of the bone

6. Tool Mark Analysis – usually done with a comparison microscope
Th7TE
Minutes 1 – 3:05