A Philadelphia father has been accused of beating his 3-month-old son to death.Samuel Cabrera, 27, was arrested and charged with murder.Cabrera’s neighbor, Rashawn Reddick, didn’t hold back her disgust when she learned of the accusations. “It makes me sick to my stomach,” she said. “A 3-month-old innocent baby. It makes me want to cry.”Last Tuesday, 3-month-old Samuel Cabrera Jr., of the 600 block...