AFTE Store - Criteria for Identification of Toolmarks Part II* Single Land Impression Comparisons

In the previous article, the criteria for an identification of straited toolmarks was examined using data collected from .38 caliber bullets in two dimensional and three dimensional images from single land impressions, comparing known matches with known non-matches. The data was used to evaluate the criteria for an identification within single land impressions based upon total matching lines; percent of matching lines; and consecutive groups of striae. In this article, additional data from the caliber’s .25 ACP, .380 ACP, and 9mm is used to evaluate the consecutive group of striae concept as a criteria for an identification, and ar compared with the previous results for the .38 special data.