LA HABRA, Calif. — An Orange County man cut off his mother's head with a circular saw and then died after trying to decapitate himself, authorities said. Police answered a 911 report of a family dispute at a Pinehurst Avenue home just after 5:30 a.m. Tuesday, entered a locked bedroom and found the body of 60-year-old Guadalupe Ruiz on a bed, police spokeswoman Cindy Knapp said. Arthur Ruiz Jr., 32, was on another bed with the saw nearby. He had died of neck injuries, police said. It was unclear why Ruiz attacked his mother, police said. A child and three...