Thanks to a 2005 DUI conviction in Pennsylvania, Edward Williams permanently lost the constitutional right to keep and bear arms. But he did not realize that until a decade later, and his confusion on that point is understandable.
The federal law that stripped Williams of his Second Amendment rights is commonly described as applying to "felons," and Williams' offense was a misdemeanor. But although his sentence did not include any time behind bars, his crime theoretically could have sent him to prison for up to five years. That was enough to trigger 18 USC 922(g)(1), which covers anyone convicted of "a crime punishable by imprisonment for a term exceeding one year."