When a foreign court convicts one of its own, a nation is forced to look inward. Ghana now faces that reckoning, as the US conviction of former Goldman Sachs banker Kwaku Asante Berko has cast a long shadow over officials who may have accepted bribes to approve an energy project during a previous administration. Deputy Attorney General Dr Justice Srem-Sai stepped forward this week to assure a skeptical public that President Mahama will not shelter former allies from prosecution — a pledge that is as much a statement of political character as it is of legal intent. The true measure of that prom