Croatian war crimes included the Gospić massacre , the killings in Sisak in 1991 and 1992 , and others , which were likewise prosecuted by Croatian courts or the ICTY . Another infamous instance of war crimes , in what would later become known as the " Pakračka poljana " case , committed by a reserve police unit commanded by Tomislav Merčep , involved the killing of prisoners , mostly ethnic Serbs , near Pakrac in late 1991 and early 1992 . The events were initially investigated by the ICTY , but the case was eventually transferred to the Croatian judiciary . More than a decade later , five members of this unit , although not its commander , were indicted on criminal charges related to these events , and convicted . Merčep was arrested for these crimes in December 2010 . In 2009 , Branimir Glavaš , a Croatian incumbent MP at the time , was convicted of war crimes committed in Osijek in 1991 and sentenced to jail by a Croatian court
Gospić massacre
Gospić massacre
Croatian War of Independence