The conviction of Efrain Rios Montt was widely seen as a victory for the enforcement of human rights. It was the first time the leader of a country was convicted of war crimes by the country he or she once ruled. But, now Rios Montt’s conviction has been overturned on a technicality. What does this mean for the fight against impunity? Emi MacLean of the Open Society Justice Initiative has been following the case closely, and joins Worldview to discuss these new developments. (Photo: AP Images).