Sacic accused HHO President Ivan Zvonimir Cicak of abusing his powers to settle scores with unlike-minded persons and those who did not sympathise the ruling Croatian Demcoratic Union.
Sacic said in a press release that Cicak had turned this nongovernmental organisation into "an extension of the HDZ", which he said was proved by the resignation of HHO Vice President Marta Vidakovic-Mukic.
Vidakovic-Mukic stepped down due to her disagreement with the HHO's recent statement about prosecution of war crimes in the aftermath of Operation Storm in August 1995 which says, among other things, that crime investigators had turned down Sacic's demand to put weapons by the side of the murdered elderly people in the Serb-populated village of Grubori in southern Croatia to make them look as if they were armed insurgents.
The human rights watchdog said in the statement on Wednesday that Sacic had been under investigation since last year for war crimes against civilians and this fact "is the main fuel for Sacic's extremist political activity today."
The Croatian prosecutorial authorities suspect Sacic of failing to do anything to prevent the crime in Grubori when on 25 August 1995 six Serb civilians were killed and houses and property in that village was damaged or set on fire.
In mid-December the prosecutors issued an indictment against three commandos Frano Drlje, Bozidar Krajina and Igor Beneti for those war crimes and requested the court to separate the proceedings against Sacic.
Sacic today accused Cicak of trying to halt his political activities in the Action for Better Croatia political party.