Keyword: "area of origin calculation"

An Experimental Study to Quantify Error Rates Resulting from Measurement Deviation in Area of Origin Reconstructions of Blunt Force Impact Patterns
Mark W. Davison, Timothy M. Palmbach
The intent of this study was to attempt to quantify error associated with the measurements required in area of origin reconstructions resulting from the analysis of blunt force impact patterns. Mathematical tables were constructed in order to examine trends associated with changing width and length ratios and the influence of…
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FORident Software Technical Paper – HemoSpat Validation
Andy Maloney, FORident Software, Inc.
The purpose of this study was to replicate the one performed in "Further Validation of the BackTrack Computer Program for Bloodstain Pattern Analysis - Precision and Accuracy" to validate the accuracy of the HemoSpat bloodstain analysis software against an accepted standard and to examine the reproducibility of the results. The…
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Further Validation of the BackTrack™ Computer Program for Bloodstain Pattern Analysis –– Precision and Accuracy
A.L. Carter, M. Illes, K. Maloney, A.B. Yamashita, B. Allen, B. Brown, L. Davidson, G. Ellis, J. Gallant, A. Gradkowski, J. Hignell, S. Jory, P.L. Laturnus, C.C. Moore, R. Pembroke, A. Richard, R. Spenard, C. Stewart
The BackTrack program for bloodstain pattern analysis is an excellent forensic tool that allows bloodstain pattern analysts to simply and quickly analyze patterns of projected bloodstains at bloodletting crime scenes. Although the program has been in use for a number of years, few validation studies have been carried out. In…
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One-Sided Impact Spatter and Area-of-Origin Calculations
Andy Maloney, Céline Nicloux, Kevin Maloney, Franck Heron
It is common practice when calculating area of origin from impact spatter to use stains from both "sides" of the pattern ‐ stains to the left and to the right of the blood source. Impact spatter at crime scenes, however, often provides the analyst with bloodstain patterns that are not…
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The Use of HemoSpat To Include Bloodstains Located on Nonorthogonal Surfaces in Area-of-Origin Calculations
Kevin Maloney, Jim Killeen, Andy Maloney
Determining the origin of impact patterns at crime scenes can be a challenge when there is limited or less-than-ideal information. This is made even more difficult if the analyst cannot incorporate data from nonorthogonal and orthogonal surfaces in the same analysis. Using HemoSpat software for impact pattern analysis allows analysts…
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