Paul is an Economic and Social Research Council Fellow and, as of January 2005, Lecturer in Psychology at The University of Liverpool, UK. He is also a Research Associate of the Police Research Lab, Carleton University, Canada. His main area of expertise is the systematic analysis of human behaviour in “crisis” (e.g., hostage) environments, particularly within the negotiation context, where his work addresses issues including effective strategy use, communication styles, and the prediction of future behaviour. He has published on these issues in leading journals, including Human Communication Research, Applied Cognitive Psychology and International Negotiation, and he has presented to academic and professional bodies both nationally and internationally. He frequently contributes to academic seminars, training courses, and policy development meetings, and he regularly peer-reviews for leading criminology and psychology journals. He has longstanding collaborations with a number of law enforcement agencies, having conducted joint research projects with many of these services and having provided psychological advice to numerous criminal investigations.