The student who was arrested after the shooting at Highlands Intermediate on Monday has been expelled, according to his family.
The 14-year-old boy's father, Jason Takayesu, says he's sorry for Monday's incident.
Takayesu says his son found the gun behind the Highlands Intermediate gym.
The eighth grader told his dad that he was showing the firearm to his friends when one of them pushed it away, and that's when the weapon went off.
According to police, the bullet hit a wall, ricocheted, then split into pieces and struck another student.
Investigators are still trying to piece together how the gun ended up on campus.