Joachim Kretschmer studied at the Freie Universität Berlin, our partner. There he received his doctorate (1998) und habilitated there (2004). During his legal career he worked in many areas. He was a judge in Dortmund, he was a criminal defense laywer in Cologne and is still admitted as a lawyer in Berlin today. For many years he worked as a lecturer in criminal law and criminal procedure law at well-known German universities. Mention should only be made of the University of Köln, the universities of Freiburg und Passau and the Leibniz-University in Hannover. Joachim Kretschmer also has a long-standing teaching position at the Danube University in Krems in Austria for sociology of law. He has been a lecturer at our university since 2017 and teaches German criminal law and criminal procedure law and the basic subjects of methodology, legal history and legal sociology with great pleasure and great success. Joachim Kretschmer writes scientific articles on many topics of criminal law and criminal procedure law for many well-known legal journals and collaborates on several books on criminal law. Particularly worth mentioning are the practice-oriented lawyer`s commentary on the Criminal code and the special part of the textbook on criminal law (edited by Hoffmann-Holland). In the two works he discusses especially the theft (§§ 242 ff. StGB). Incidentally, two of his main research areas are commercial criminal law and, above all, current and politically exciting migration criminal law.