Global leaders often come together to work for what they hope is the greater good, such as tackling climate change, conflict and the economic crisis. But does the world need a new body to put leaders on trial? Zeinab Badawi speaks to the American judge and academic Mark Wolf, who is trying to establish an international anti-corruption court to bring to justice leaders who abuse their power for private gain. Is this an idea whose time has come, or do we already have sufficient levers to bring the kleptocrats to court?