A man strangled a 10-year-old girl in a possible double murder and attempted suicide in The Bronx, police sources said Sunday. Police found the dreadful scene when they arrived in the third-floor Belmont apartment near East 181st Street. just after 1:30 p.m. Saturday. The 10-year-old girl, Heaven Ross, and her 34-year-old mother, Linda Manigault, were...