Vojislav Šešelj was acquitted by the International Criminal Tribunal for the former Yugoslavia on 31 March 2016. The Trial Chamber of the ICTY assessed evidence on the recruitment of volunteers (who later became perpetrators of international crimes), the defendant’s extremist, nationalistic and public hate speeches, and drew the conclusion that he is not responsible for war crimes or crimes against humanity. The present paper discusses gaps and mistakes appearing in the judgement from the point of view of two criminal liability concepts: instigation and aiding and abetting. After briefly summarizing the standards applied by the ICTY, the author presents a reassessment of the facts referring also to the major arguments of Judge Flavia Lattanzi (dissenting).