A Pennsylvania man allegedly stabbed his wife and 17-year-old son to death and seriously injured an older son before stabbing himself to death. Hanover Police said that Rogelio Arvizu, 50, stabbed 17-year-old Dylan Arvizu-Morales and Guadalupe Arvizu-Morales, 49, Saturday night, fatally injuring them, WHP reported. After attacking them, Arvizu’s 27-year-old son arrived at the house, …