He was accused, along with former Croatian President Franjo Tudjman, of masterminding the executions and other actions during the Croatian military offensive operation, codenamed Operation Storm.
Împreună cu fostul preşedinte croat Franjo Tudjman, acesta a fost acuzat de coordonarea execuţiilor şi altor acţiuni din timpul ofensivei militare croate care purta numele de cod Operaţiunea Furtuna.