Trace DNA success rates relating to volume crime offences |
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| Authors: | Jennifer J. Raymond Roland A.H. van Oorschot Peter R. Gunn Simon J. Walsh Claude Roux |
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| Affiliation: | aCentre for Forensic Science, University of Technology, Sydney, Broadway, NSW 2007, Australia;bNSW Police Force, Forensic Services Group, Clunies Ross St, Pemulwuy, NSW 2145, Australia;cVictoria Police Forensic Services Centre, Forensic Drive, Macleod, Victoria 3085, Australia |
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| Abstract: | In this study, 252 trace DNA samples (from handled surfaces) from 201 burglary, robbery and drugs cases were compiled to assess success rates and to interpret the value of trace DNA evidence in volume crime investigations. The average amount of DNA recovered from the trace DNA samples collected was 1.7 ng. Full or major (12 or more alleles) profiles were recovered from 14% of samples. Samples from firearms and burglary points of entry were the least successful. Mixtures were recovered from 21% of samples, presenting a case for the collection of more elimination profiles to enable more samples to be used for database purposes. The research highlighted the difficulties in collecting data relating to the success rates of samples. Computerised automation of this process would be extremely beneficial in the assistance of policy development, method application, training, and investigative usefulness. |
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| Keywords: | Trace DNA Volume crime Success rates |
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