Jill Biden’s ex-husband was arrested Monday on charges he murdered his wife in their Delaware home in December, according to a report. William Stevenson – who was previously married to the former first lady – has been hit with first-degree murder charges for allegedly killing his current spouse, Linda Stevenson, 64 at their house in Oak Hill, Fox 29 reported. Cops responded to a domestic dispute call on Dec. 28 and found Linda unresponsive on the floor.