|Dr Geoffrey Stewart Morrison is one of the leading thinkers in the world about problems of forensic inference.
No one has thought more carefully about how to identify relevant comparison populations.
Few have his ability to understand and explain forensic statistics.
Prof William C Thompson
School of Law, and Department of Criminology, Law & Society, University of California Irvine
Co-counsel for OJ Simpson in his criminal trial in Los Angeles, 1994–1995
Originator of the terms “prosecutor’s fallacy” and “defense attorney’s fallacy”
- Dr Morrison receved his PhD from the Department of Linguistics, University of Alberta in 2006.
- His research focussed on statistical modelling of speech data.
- He began working in forensic science in 2007 when he was recruited as a Research Associate on a forensic voice comparison research project directed by Dr Philip Rose at the Australian National University.
- 2010–2013 he was Director of the Forensic Voice Comparison Laboratory at the School of Electrical Engineering & Telecommunications, University of New South Wales.
- He brought in almost one million dollars in external research funding from US government sponsored research and from an Australian Research Council reserch project in collaboration with several partner organisations including the Australian Federal Police, New South Wales Police, Queensland Police, and the National Institute of Forensic Science.
- 2010–2013 he was also Chair of the Forensic Acoustics Subcommittee of the Acoustical Society of America.
- 2012–2014 he was a Subject Editor for the academic journal Speech Communication.
- In 2015 he had a six-moth post as Scientific Counsel for INTERPOL’s Office of Legal Affairs.
- His work included collaborating with law enforcement agencies from several countries to develop end user requirements for an investigative speaker identification system, and assisting technical partners in converting those requirements into a functioning system.
- Since 2015 Dr Morrison has also been an Adjunct Professor at the Department of Linguistics, University of Alberta, 2010–2015 he was an Adjunct Associate Professor.
- He currently works as an Independent Forensic Consultant.
- Dr Morrison has provided training in the form of tutorials, workshops, and courses (lasting from hours to weeks) at universities, academic conferences, operational forensic laboratories, and lawyer’s offices around the world (in Europe, Asia, Australasia, North America, and South America).
- Audience members have included researchers and students, forensic practitioners, police officers, and lawyers. He specialises in presenting material which may appear to be technically challenging in a way which makes the underlying concepts easy to understand.
- Dr Morrison speaks fluent English and Spanish, and can provide, and has provided, training in both these languages.
- Dr Morrison has conducted forensic casework and been involved in legal cases in Australia and in the United States, and has been involved in a journalistic case in Canada.
- His work involves both conducting forensic voice comparison analyses and critiquing reports submitted by others. He has submitted written reports and appeared in court as an expert witness.
- In 2015 he advised the defence in relation to a Daubert hearing on the admissibility of a forensic voice comparison analysis proffered by the prosecution in US Federal Court.
- Dr Morrison is an active researcher and has published numerous refereed and invited journal articles, book chapters, and conference proceeding including:
- Enzinger, E., Morrison, G. S., & Ochoa, F. (2016). A demonstration of the application of the new paradigm for the evaluation of forensic evidence under conditions reflecting those of a real forensic-voice-comparison case. Science & Justice, 56, 42–57. doi:10.1016/j.scijus.2015.06.005
- Enzinger, E., & Morrison, G. S. (2015). Mismatched distances from speakers to telephone in a forensic-voice-comparison case. Speech Communication, 70, 28–41. doi:10.1016/j.specom.2015.03.001
- Morrison, G. S. (2014). Distinguishing between forensic science and forensic pseudoscience: Testing of validity and reliability, and approaches to forensic voice comparison. Science & Justice, 54, 245–256. doi:10.1016/j.scijus.2013.07.004
- Morrison, G. S., & Stoel, R. D. (2014). Forensic strength of evidence statements should preferably be likelihood ratios calculated using relevant data, quantitative measurements, and statistical models – a response to Lennard (2013) Fingerprint identification: How far have we come? Australian Journal of Forensic Sciences, 46, 282–292. doi:10.1080/00450618.2013.833648
- Morrison, G. S., Lindh, J., & Curran, J. M. (2014). Likelihood ratio calculation for a disputed-utterance analysis with limited available data. Speech Communication, 58, 81–90. doi:10.1016/j.specom.2013.11.004
- Morrison, G. S. (2013). Tutorial on logistic-regression calibration and fusion: Converting a score to a likelihood ratio. Australian Journal of Forensic Sciences, 45, 173–197. doi:10.1080/00450618.2012.733025
- Grigoras, C., Smith, J. M., Morrison, G. S., & Enzinger, E. (2013). Forensic audio analysis – Review: 2010–2013. In: NicDaéid, N. (Ed.), Proceedings of the 17th International Forensic Science Mangers’ Symposium (pp. 612–637). Lyon, France: Interpol.
- Zhang, C., Morrison, G. S., Enzinger, E., & Ochoa, F. (2013). Effects of telephone transmission on the performance of formant-trajectory-based forensic voice comparison – female voices. Speech Communication, 55, 796–813. doi:10.1016/j.specom.2013.01.011
- Zhang, C., Morrison, G. S., Ochoa, F., & Enzinger, E. (2013). Reliability of human-supervised formant-trajectory measurement for forensic voice comparison. Journal of the Acoustical Society of America, 133, EL54–EL60. doi:10.1121/1.4773223
- Morrison, G. S. (2012). The likelihood-ratio framework and forensic evidence in court: A response to R v T. International Journal of Evidence and Proof, 16, 1–29. doi:10.1350/ijep.2012.16.1.390
- Morrison, G. S., & Hoy, M. (2012). What did Bain really say? A preliminary forensic analysis of the disputed utterance based on data, acoustic analysis, statistical models, calculation of likelihood ratios, and testing of validity. In Proceedings of the 46th Audio Engineering Society Conference on Audio Forensics: Recording, Recovery, Analysis, and Interpretation, Denver, Colorado (pp.203–207). Audio Engineering Society.
- Morrison, G. S., Ochoa, F., & Thiruvaran, T. (2012). Database selection for forensic voice comparison. In Proceedings of Odyssey 2012: The Language and Speaker Recognition Workshop, Singapore (pp. 62–77). International Speech Communication Association.
- Morrison, G. S. (2011). Measuring the validity and reliability of forensic likelihood-ratio systems. Science & Justice, 51, 91–98. doi:10.1016/j.scijus.2011.03.002
- Morrison, G. S. (2010). Forensic voice comparison. In I. Freckelton, & H. Selby (Eds.), Expert Evidence (Ch. 99). Sydney, Australia: Thomson Reuters.
- Morrison, G. S. (2009). Forensic voice comparison and the paradigm shift. Science & Justice, 49, 298–308. doi:10.1016/j.scijus.2009.09.002
- Links to Dr Morrison’s publications can be found at http://geoff-morrison.net/
- Dr Morrison has lived and worked in four Canadian provinces and in six other countries: United Kingdom, Japan, Spain, United States; Australia, and France. His current home base is Vancouver, British Columbia, Canada.
Unless explicitly stated otherwise, any opinions expressed by Dr Morrison are his own and do not necessarily represent the policies or opinions of any of the organisations or individuals with which he is currently or has previously been affiliated. Such opinions include the content of this website.