Police announced they have arrested the man believed to be responsible for an attack that killed a family of four in Irondequoit, New York, last month.Julio Cesar Pimentel-Soriano, 34, was arrested and charged with second-degree murder in the Aug. 31 deaths of Fraime Ubaldo, 30; Marangely Moreno-Santiago, 26; Evangeline Ubaldo-Moreno, 4; and Sebastian Ubaldo-Moreno, 2.Firefighters…