Clive Walker is professor of Criminal Justice Studies at the School of Law, University of Leeds, where he has served as the Director of the Centre for Criminal Justice Studies (1987–2000) and as Head of School (2000–2005, 2010). He has been a visiting professor at George Washington and Stanford Universities in the USA, and Melbourne and New South Wales in Australia. He has researched and written extensively on terrorism issues, including a book, Terrorism and the Law (OUP 2011), which was funded by an AHRC fellowship. He is currently the special adviser to the Home Office’s Independent Reviewer of Terrorism Legislation and has served as a special adviser to the UK Parliamentary select committee which scrutinised what became the Civil Contingencies Act 2004. That experience resulted in another book, The Civil Contingencies Act 2004: Risk, Resilience and the Law in the United Kingdom (OUP 2006). He has also published extensively on media law, most recently an edited collection, Free Speech in an Internet Era (Carolina Academic Press 2013).