Slobodan Milosevic.

The Former President of Yugoslavia who was in charge of the Bloody Massacres committed towards Albanians of Kosova in 1998, 1999.
 
Also the Yugoslav Federal and Republic of Serbia forces and agencies and their paramilitary agents committed widespread atrocities in Bosnia and Croatia against both civilians and prisoners of war. These atrocities included the criminal acts of killing, expulsion, rape, detention in concentration camps, forced labor, torture, mutilation, and the looting and destruction of property. All of these acts were perpetrated on a large scale, and often with severe brutality when Slobodan Milosevic was the superior authority over Yugoslav Federal and Republic of Serbia forces and agencies.