Holly Lahti burst into the spotlight a week ago in a feel-good story about a single mother who won a $190 million Mega Millions jackpot. Then came the mugshot: a thin young woman with disheveled brown hair, sporting a black eye and cuts and bruises on her face and neck. It turned out she was separated from a man who court records indicated had abused her, and now has a possible claim to some of the money through a quirk in Idaho law.