Dr. Colin G. G. Aitken, Ph.D. is a Professor at the University of Edinburgh. He is interested in the applications of statistics to forensic science and legal reasoning, with an emphasis on Bayesian approaches. Particular applications include the determination of likelihood ratios, estimation of sample sizes, and evidence interpretation. Publications in statistical, legal, and forensic scientific journals, and co-author of three books in the area. He has written several witness statements and been an expert witness in a trial related to drugs on banknotes. He has been involved in a project sponsored by the Nuffield Foundation to produce a series of reports for the criminal legal profession on probabilistic and statistical reasoning in criminal proceedings.