Cyrille Fijnaut was Professor of Criminal Law and Criminology at Erasmus University Rotterdam, the KU Leuven and is Emeritus Professor at Tilburg University. Particularly in the framework of his research on organized crime and special proactive police powers he frequently devoted attention to the drugs problems and the drugs policy in the Netherlands and the European Union. He has published widely about both issues in national and international journals and edited books. At the request of the governing body of the Euroregion Meuse-Rhine he carried out – together with Brice De Ruyver – in 2008 a comprehensive and in-depth inquiry into the drugs-related crime problems in this “country without borders”. The results of this research project were published in the report With a view to a common containment of the drugs related crime problems in the Euroregion Meuse-Rhine. Brice De Ruyver, Full Professor at Ghent University, is national Drug Coordinator (since 2010), member of the Scientific Committee of the European Monitoring Centre for Drugs and Drug Addiction (since 2002) and Member of the Reference Group on Drug Supply of the EMCDDA (since 2013). Furthermore, he was involved as an expert in the Parliamentary Working Group on Drugs (1996-1997). Brice De Ruyver lectures a.o. Drug Policy and Drug Phenomena at Ghent University. He was and is coordinator of several drug related research projects and has published numerous articles and book chapters on a.o. the UN Drug Treaties, the cooperation between the criminal justice system and (drug) treatment services, drug related nuisance, drug related public expenditures, drug related crime and drug supply.