HARDtalk - John Githongo

It was once a relatively stable African success story. Now Kenya has descended in to the sort of chaos which has often bedevilled many of its neighbours. The cause is December's disputed re-election of President Mwai Kibaki. African leaders continue to try to mediate. The violent aftermath of the vote has already led to hundreds of deaths. Jonathan Charles talks to John Githongo, who was once in charge of rooting out Kenyan government corruption but is now in self-imposed exile in Britain.