The report is based on the analysis of a selection of 30 migrant smuggling cases presenting specific judicial cooperation challenges and features, out of a total of 189 registered at Eurojust, covering the period from 1 January 2015 to 31 December 2017. The analysis was complemented by practitioners’ views, expressed during dedicated Eurojust meetings. The report draws on statistical information, identifies the main features of the cases at hand, highlights specific obstacles and challenges, presents the judicial responses developed to address those obstacles and challenges and summarises best practice and lessons learned