1992 : Ratko Mladic declines to answer questions on Srebrenica massacre , Sarajevo siege . Mladic says U.N.-backed court is ` ` " , '' argues it could harm his own case . He is called as a defense witness in the trial of ex - Bosnian Serb leader Milan Karadzic . Both men are being tried on charges of genocide and other war crimes during the 1990s .
NEW : Ratko Mladic declines to answer questions on Srebrenica massacre , Sarajevo siege . Mladic says U.N.-backed court is `` satanic , '' argues testimony could harm his own case . He is called as a defense witness in the trial of ex-Bosnian Serb leader Radovan Karadzic . Both men are being tried on charges of genocide and other war crimes during the 1990s .