ABSTRACT
Tool mark impression evidence is typically found at scenes where either a door or a window has been pried open to gain entry to the property. Most tools, such as hammers, pry bars, and screwdrivers, have class and individual characteristics on the metal portion or tip of the item. The individual characteristics on tools are typically small scrapes and gouges in the metal, which, when placed in contact with another surface, will transfer in the impression. In some cases, the tool will be dyed or painted a color, such as a blue crowbar, and the paint or dye can also transfer to another surface, leaving not only a tool mark impression but also a paint transfer that can be used for comparison purposes.
