As Prime Minister, he advocated pro-democratic reforms and the integration of Serbia into European structures. His government ratified the European Convention on Human Rights and implemented innovations in line with the Council of Europe recommendations, which led to the introduction of institutions for the protection of human rights and freedoms and becoming Serbia and Montenegro a member state of the Council of Europe. His government strongly advocated cooperation with the International Criminal Tribunal for the former Yugoslavia (ICTY). Following the arrest of Special Operations Unit (JSO) members and extradition to the ICTY, the JSO organized an armed mutiny in Belgrade. Đinđić was assassinated in 2003 by Zvezdan Jovanović, a former JSO member operative with ties to the Zemun Clan.