He was charged with four counts of attempted homicide, aggravated assault, reckless endagerment, and illegally possessing a firearm as a juvenile.
According to reports:
Willet was attempting to get revenge for a robbery and assault last month, said police.
Police said the shooting victims - Brashear students Andrew Umphrey, 17, DaJour Jones, 15, and Robert Minor, 17 - were suspects in an Oct. 18 assault inside the school in which Willet was the victim.
Willet "decline to prosecute," said police. "He made remarks that he would take matters in to his own account."
Two of the shooting victims were shot in the head and the third was shot in the foot less than a quarter-mile from the school. They are recovering in area hospitals.
Every gun in the hands of a child must first pass through the hands of an adult.