He was indicted by the International Criminal Tribunal for the former Yugoslavia (ICTY) in 1995, along with former Bosnian Serb leader Radovan Karadzic.
Međunarodni krivični sud za bivšu Jugoslaviju (MKSJ) podigao je optužnicu protiv njega i bivšeg lidera bosanskih Srba Radovana Karadžića 1995. godine.