United Nations prosecutors have sought two separate trials for ex-Bosnian Serb military chief Ratko Mladic, in an attempt to speed up the prosecution and ensure that a verdict is handed down to the aging war crimes suspect. The chief prosecutor for the U.N. war crimes tribunal for the former Yugoslavia on Wednesday said he wants Mladic to be first tried for his alleged role in the 1995 Srebrenica massacre, in which 8,000 Muslim men and boys were killed. Mladic would then be tried on other charges, including the 44-month siege of Bosnia's capital city, Sarajevo, in which 10,000 people died. Mladic was arrested in Serbia in May after being a fugitive for 16 years. During his first court appearance in June, Mladic had described himself as gravely ill.