Professor Crofts is a graduate of University College London (LL.B.), the Bayerische Julius-Maximilians-University Würzburg, Germany (LL.M.) and the European University Viadrina in Frankfurt/O., Germany (Dr. iur.). His research interests are comparative criminal law, criminalisation, criminal law reform and criminal responsibility. He has published in English and German in these fields in national and international journals. He is author of The Criminal Responsibility of Children and Young Persons in Germany and England and co-author of Sexting and Young People.