Fibre Discrimination by Various Tests and Analytical Techniques (Diskriminasi Serat menggunakan Pelbagai Ujian Saringan dan Teknik Analitikal)

Abstract

Fibres are important trace evidence that can be found during the course of crime scene investigation. The identificationand analysis of these fibres shed light as to the circumstances surrounding a particular crime. Identifying the factors thataffect the transference of fibres under various environments are crucial in providing robust conclusions of a case per se, ashighlighted in this work. Donor garments were made up of four different types of fibre; 100% cotton, 100% nylon, 100%polyester and 100% wool, that were used to observe the differences in the number of transferred fibres to the recipientgarment (100% cotton) and vice versa with increasing contact times of 30, 60, 180, and 300 seconds respectively. Tosimulate contact between the donor garment worn by a suspect and the recipient garment worn by a victim in real-lifesituations, the donor garment was placed on top of the recipient garment which was laid on a piece of plywood. Thenumbers of transferred fibres, both from the donor to the recipient garment and from the recipient to the donor garmentwere observed and tested using microscopic examination, burning test, solubility test and dye extractability test. Resultsindicated that different types of garments transferred different number of fibres with increasing contact times, and theidentification of the fibres are possible via the different tests applied in this work.DOI : http://dx.doi.org/10.17576/JSKM-2019-17SI-10