In May 2012, I blogged about the Ratko Mladic trial before the International Criminal Tribunal for the Former Yugoslavia (ICTY) - Ratko Mladić - Trial at the ICTY His trial commenced on 16th May 2012 and updates on the trial are available via the ICTY website - Mladic. Judgment in his case is expected in November 2017.
The other particularly notable trial, again still on-going, is that of Radovan Karadzic - see ICTY Karadzic - his trial commenced on 26 October 2009. His trial has concluded and judgment is expected in the first quarter of 2016.
It is reported that Mladic refused to testify for the defence in Karadzic's trial - The Guardian 28th January 2014. "Karadzic had a list of six questions he wanted to ask of Mladic,
focusing on the general's knowledge of the Srebrenica massacre and the
Serb siege of the capital Sarajevo, and how much of that information he
had passed to Karadzic. Karadzic was expected to argue that the
two had no common plan and that he was unaware of his most senior
general's activities, and so could not be held personally responsible
for the worst bloodshed in Europe since the second world war. Mladic
gave the same response in answer to each question: "I cannot and do not
wish to testify ... because it would impair my health and prejudice my
own case," he said, offering instead to read a seven-page statement he
said he had written the previous evening – an offer the judges refused. Proceedings were complete after less than two hours and Mladic was led out, exchanging nods with Karadzic."
The ICTY's website pages on 20 Years of International Justice are particularly interesting.