The non-state actors of security studies such as transnational organized crime and terrorism are more complicated and challenging in terms of empirical support. The comparative decrease in state sponsorship of terrorism after the end of cold war led the scholars, law enforcement agencies and intelligence organizations to investigate the financial resources of global terrorism. The nexus between terrorists and organized crime groups is based on ad hoc interdependence rather than alleged continual convergence. However, terrorist organizations are more involved into organized crime activities without cooperating with the transnational organized crime groups. This paper examines the evolution of PKK-KONGRA GEL's involvement into illicit drug business from taxing the traffickers to distribution of heroin over the Western European street markets.