Simple modified freezing technique for identification of human scalp and pubic hairs

摘要

© 2011 Forensic Medicine Authority.Background: Examination of the macroscopic and microscopic appearance of human hairs is of great importance in forensic investigations. Objective: The aim of this study is to establish a simple and a low-cost freezing technique for hair cross-sectioning especially suited for use in developing countries. The devised technique is further applied for the differential identification of microscopic cross-sections of human hairs obtained from two different body regions (scalp or pubic). Material and methods: Samples of human hair from both head and pubic regions obtained from Egyptian volunteers of both sexes. A simple modified freezing technique was devised for making cross-sections of the hairs. The modified steps of this technique are suggested by the author. Results: There were marked differences between the characteristic regular contours of hair sections obtained from head hairs as compared with the irregular contours of those from the pubic region. Conclusions: The devised modified freezing technique used in the present study can be considered as a reliable method for making cross-sections of hairs. In addition it is rapid, simple and low cost compared to other methods; thus making it more suited for use in developing countries.