(Foley, MN) -- A Cold Spring woman pleaded guilty to first-degree murder in the shooting death of her ex-husband as the second week of her trial was under way. Thirty-nine-year-old Angelina O’Mara admitted this morning (Tues) that she fatally shot James O’Mara in October of 2011. O’Mara says she brought a .22-caliber rifle into O’Mara’s Sauk Rapids apartment and shot him once in the head. She’ll be sentenced December 21st in Benton County District Court. O'Mara is also charged with fatally shooting her boyfriend, Michael Pies of Blaine, the next day in Ashland, Wisconsin.