VICTORVILLE, Calif. —  A 6-year-old Victorville boy brought a loaded .45-caliber handgun to school and it wasn't discovered until recess when he was sent to the campus office because of sagging pants.

The gun slipped down the first-grader's pant leg Wednesday while a school clerk was helping him put on a belt.

San Bernardino County sheriff's spokeswoman Karen Hunt says the boy took the gun from his father's vehicle. Investigators say the weapon was stolen during a November robbery.

The boy's father Michael Lewis has now been arrested and booked for investigation of receiving stolen property and possession of a firearm by a felon.

The boy, who will be expelled under the school's zero-tolerance weapons policy, has been released to the custody of his mother.