From a story in the New York Times:
Under federal law, people with felony convictions forfeit their right to bear arms. Yet every year, thousands of felons across the country have those rights reinstated, often with little or no review. In several states, they include people convicted of violent crimes, including first-degree murder and manslaughter, an examination by The New York Times has found.
Since 1995, more than 3,300 felons and people convicted of domestic violence misdemeanors have regained their gun rights in the (Washington State) — 430 in 2010 alone — according to the analysis of data provided by the state police and the court system. Of that number, more than 400 — about 13 percent — have subsequently committed new crimes, the analysis found. More than 200 committed felonies, including murder, assault in the first and second degree, child rape and drive-by shooting.