Ratko Mladic 'threatened to wipe out populations' While the tribunal has already often proved that massive crimes were committed during the multi-ethnic war in Bosnia-Herzegovina, the challenge for prosecutors in Mladic's case is to tie him to atrocities. Mr Harland, a Briton who now heads a Swiss peace foundation, said the United Nations took seriously Mladic's threats. I think our view on the threats was he was like a bully. If the opportunity arose to carry out these threats, probably he would do it. But they were not really statements of plans," he said. As Mr Harland was led into court, Mladic glared at him over the top of his reading glasses. Mr Harland did not meet his gaze. Mladic paid careful attention throughout, frequently consulting piles of heavily annotated papers and maps spread on the desk in front of him. Though he has suffered three strokes, his health appears to have improved since his incarceration last year after 16 years on the run. Gen Sir Richard Dannatt, the former Chief of the General Staff who served briefly in Bosnia after the Dayton Accords that ended the war, is due to give evidence this week on the command structure of the Bosnian Serb forces. He has also testified previously. Earlier, the first prosecution witness, Bosnian Muslim Elvedin Pasic, finished his testimony with a tearful plea for help to find his father's body. On Monday Mr Pasic told the court how he was separated from his father by Serb forces in 1992 when he was 14 and never saw him again. Prosecutors say the father was among some 150 men massacred by Serbs early in the war. "I miss my dad," Mr Pasic said yesterday, choking back tears. He asked that if anybody had information about the whereabouts of his father's body, "please come forward and let me find my dad." The Mladic trial, which began in May, is expected to last three years.