Whether it concerns bankers after the crisis in 2008 or the shooting of innocent civilians by American contractors in Iraq, the prosecution does not seem to be up to the task. [The fatal] shooting [of 17 people by Blackwater Worldwide mercenaries] in Nisour Square [Baghdad in Oct. 2007] became a signature moment in the Iraq war. Five Blackwater security guards were indicted on manslaughter and weapons charges, and a sixth entered a plea deal to testify against his former colleagues. But over the years, a case that once seemed so clear-cut has been repeatedly undermined by the government's own mistakes. Prosecutors are trying to hold together what is left of it. But charges against one contractor were dropped last year because of a lack of evidence. And the government suffered another self-inflicted setback in April when a federal appeals court ruled that the prosecution had missed a deadline and allowed the statute of limitations to expire against a second contractor. The [episode inflamed] anti-American sentiment abroad and helped cement the image of Blackwater, whose security guards were involved in scores of shootings, as a trigger-happy company that operated with impunity because of its lucrative contracts with the American government. As citizens, we need to ask why our government fails to achieve any accountability for such blatant wrongdoing," said Susan Burke, a lawyer who represented Iraqi victims of the Nisour Square shooting in a lawsuit that Blackwater settled by paying an undisclosed amount. "The ongoing delays and mistakes undermine any confidence in the system."