He was on life support for several days before he was pronounced dead on Saturday.
Jacob was critically wounded Wednesday on the playground of his school when a gunman opened fire, authorities say. The alleged shooter, a 14-year-old boy, was taken into custody at the school.
Another boy and a teacher were also injured in the attack. They were treated at an area hospital and released.
Before the school shooting, the 14-year-old allegedly shot his father to death at their home a miles away. The boy has been charged as a juvenile with murder and attempted murder.
Video from NBC News: