The leader that was charged as a war criminal during the Kosovo crisis was Slobodan Milosevic.
Explanation:
Slobodan Milosevic was President of Serbia from 1989 to 1997 and President of Yugoslavia from 1997 to 2000. He led the Socialist Party of Serbia (SPS) since its founding in 1990. Milosevic was a very authoritarian leader and was accused by the international community of having violated international law during his time in power.
In 2001, Milosevic was prosecuted by the International Criminal Tribunal for, among other things, war crimes and crimes against humanity during the Bosnia and Kosovo war. However, he died before the trial ended.
