In each state, researchers examined court rulings from 2004 through 2008 in which judges found that prosecutors had committed violations such as mischaracterizing evidence or suborning perjury. All told, the researchers discovered 660 findings of prosecutorial error or misconduct. In the overwhelming majority of cases, 527, judges upheld the convictions, finding that the prosecutorial lapse did not impact the fairness of the defendant’s original trial. In 133 cases, convictions were thrown out.

Only one prosecutor was disciplined by any oversight authorities, the report asserts.