A man was sentenced to ten years in state prison for causing the death of his 4-month-old son four years ago in Hamilton, the Atlantic County Prosecutor’s Office announced Thursday. Jose Rojas was sentenced on a charge of manslaughter but it was unclear if he had previously pleaded guilty or was convicted of the crime. A spokesperson for the office could not be reached for comment Thursday night. Police responded to a call of an unresponsive child at the 6000 block of Hoover Drive in the Mays Landing second of Hamilton Township on Jan. 29, 2018, the office said. When they arrived, they found a…