Supervises Criminology, Sentencing and the Penal System.

"Explaining Police Support for Use of Force and Vigilante Violence in Ghana" [2011] Policing & Society 21(2): 129-149

"Identifying the Correlates of Police Organisational Commitment in Ghana" [2010] Police Quarterly 13: 73 - 91

"Public Confidence in the Police: Testing the Effects of Experience of Police Corruption in Ghana" [2010] British Journal of Criminology 50: 296 – 319

"Public Cooperation with the Police in Ghana: Does Procedural Fairness Matter?" [2009] Criminology 47: 1265 – 1293

"Self-Help, Policing and Procedural Justice: Vigilantism and the Rule of Law in Ghana" [2009] Law and Society Review 43: 245 – 269

"Legitimation and Resistance: Police Reform in the (un)making" in L. K. Cheliotis (Ed), Roots, Rites and Sites of Resistance: The Banality of Good (Palgrave Macmillan)

"Legitimacy" in R. Canton and D. Hancock (Ed), Dictionary of Probation and Offender Management (Willan Publishing)

"Tackling Prison Overcrowding. Edited by M. Hough, R. Allen & E. Solomon" [2010] Howard Journal of Criminal Justice 49(5): 552-553

"Policing Public Disorder: Theory and Practice by D. Waddington" [2009] Theoretical Criminology 13(4): 516–518

"Democratic Policing in Transitional and Developing Countries. Edited by N. Pino and M. D. Wiatrowski" [2008] Howard Journal of Criminal Justice 47(2): 217–218

"Theorising Surveillance. Edited by D. Lyon" [2008] Punishment and Society 10(1): 91–92

"Inventing Fear of Crime by M. Lee" [2008] Howard Journal of Criminal Justice 47(5): 564–565

"Global Surveillance and Policing. Edited by E. Zureik and M. B. Salter" [2007] British Journal of Criminology 47(4): 696–698

"Police Self-Legitimacy: Theory and Evidence" (Annual meetings of the American Society of Criminology. San Francisco – U.S.A, Nov 2010)

"Sociological Theory and Police Research" (Annual meetings of the American Society of Criminology. San Francisco – U.S.A, Nov 2010)

"Understanding Legitimacy: A Dialogic Relationship within Institutional Normative Order" (Invited talk at Institute of Criminology Public Seminar Series. University of Cambridge, Cambridge – U. K., Oct 2010)

"Whose Legitimacy? Why Legitimacy?" (Anual meetings of theEuropean Society, Ličge –Belgium, Sep 2010)

"Consent and Legitimacy in Policing" (Annual meetings of the American Society of Criminology, Philadelphia, Nov 2009)

"Police Legitimacy and the Problem of Multiculturalism" (Annual meetings of the European Society, Ljubljana, Slovenia, Sep 2009)

"On the Cross-Cultural Validity of a Legitimacy Scale: A Study in Ghana. Paper Presented at the" (Annual meetings of the American Society of Criminology, St Louis – Missouri, U.S.A, Nov 2008)

"Corruption Reforms, Resistance and Legitimation in Policing" (Annual meetings of the European Society, Edinburgh, U.K., Sep 2008)

"(In)visibility, Power and Legitimation" (Annual meetings of the European Society, Edinburgh, U.K, Sep 2008)

"Public Cooperation with the Police in Ghana: Lessons for Policing Multicultural Societies" (Annual Stockholm Criminology Symposium, Stockholm, Sweden, Aug 2008)

"Legitimation, Internal Conversations and Commitment to Police Work" (annual meetings of the British Society of Criminology, Huddersfield, U.K, Jul 2008)