Illuminating the benefits and limitations of forensic light sources |
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| Affiliation: | 1. Cellmark Forensic Services, 16 Blacklands Way, Abingdon Business Park, Abingdon, Oxfordshire OX14 1DY, UK;2. Cellmark Forensic Services, Unit B1, Buckshaw Link, Ordnance Road, Buckshaw Village, Chorley, Lancashire PR7 7EL, UK;3. Forensic Science Northern Ireland, 151 Belfast Road, Carrickfergus, County Antrim BT38 8PL, UK;4. Department of Justice and Equality, Forensic Science Ireland, Garda Headquarters, Phoenix Park, Dublin 8, Ireland;5. Eurofins Forensic Services, Building 3, Drayton Manor Business Park, Tamworth, Staffordshire B78 3GL, UK;6. SPA Forensic Services, Scottish Crime Campus, Craignethan Drive, Gartcosh G69 8AE, UK;7. Eurofins Forensic Services, Sir Alec Jeffreys Building, Peel Avenue, Calder Park, Wakefield WF2 7UA, UK |
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| Abstract: | Forensic light sources, such as a Crime-lite, are used in forensic laboratories and by police staff in the examination for, and detection of, biological material. Whilst the benefits of using forensic light sources are relatively well understood, their limitations are less-so. This report details the outcome of studies, validation and review by three forensic laboratories, as well as three case examples, to highlight both the strengths and weaknesses of the tested forensic light sources and to demonstrate that, whilst a useful preliminary screening tool, they should not be used in isolation without subsequent presumptive chemical testing. False positives and negatives are common, and the background substrate and specific biological material present can have a significant effect on the outcome of examination when using a forensic light source. |
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| Keywords: | Body fluid forum Semen Body fluid Forensic light source Crime-light |
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