Ahmed – not his real name – is a Sudanese interpreter for the International Criminal Court, working on its investigation into alleged war crimes and crimes against humanity in Darfur.

I’m pleased they’ve issued an arrest warrant for Sudan’s president, Omar al-Bashir. I’ve been to refugee camps in Chad three times as an interpreter for the ICC. I know exactly what evidence they’ve got, and it’s strong. But it’ll take time. For now it’s just talking.