Criminal networks and the knowledge about them are, like all social phenomena and bodies of knowledge, socially embedded and constructed. As such, they are always also valid indicators of negotiations of conflictive societal processes and dynamics. The present paper discusses how transdisciplinary and evidence-based knowledge production can contribute to solving societal challenges on the basis of a sensitive but also highly relevant example. Applying qualitative content analysis to contributions in two conferences on the topic of so-called clan crime, it shows that there is much room for productive exchange between academia and practice regarding security policy — a prospect that is welcomed and positively evaluated by both sides. From the debates at these events, the present paper presents three areas in which transdisciplinary approaches were recommended—offences and their evaluation, conceptual considerations in security policy, and holistic solutions for complex security issues.