A 23-year-old woman was arrested Thursday over allegedly causing fatal injuries to her 3-month-old son by punching him repeatedly at their home in the western Japanese city of Takamatsu, with the mother suspected of having been involved in abusing the boy, police said.Ayami Tsumori admitted to the charge, saying, "I punched my child in the head as he would not stop crying," the police said, adding that an autopsy showed the baby's skull and ribs were broken.According to the police, the woman is suspected of having used violence against her son Minato at some point between late July and Thur…READ FULL ARTICLE