The 15-year-old boy who police arrested for bringing a gun to a Mullins school did the same thing before at a school in Horry County.
The superintendent of the Mullins School District says the teenager who brought a gun to Mullins High was actually kicked out of Green Sea Floyds High School in Horry County last year for the same reason.
But they may not have found that out without their surveillance system.
Police say the 15-year-old boy showed up outside Mullins High School in the morning to pick up a student.
Officers say he showed a gun to three students.
They told the principal, who in turn called police.
The Mullins School District Superintendent, Doctor Nathaniel Miller says surveillance cameras at Mullins High captured a picture of the boy, and they used that picture to their advantage.
"We was able to isolate him in the parking lot. Get picture of the individual," said Miller.
Doctor Miller says some students knew he went to Green Sea Floyds High School.
So they emailed the surveillance picture to officials there.
"We had a positive match," added Miller.
They identified the 15-year-old and police later caught him at a home in Mullins.
Doctor Miller says officials at Green Sea Floyds high told him the boy brought a weapon to that school last semester.
"He had a prior record over at Green Sea Floyds was expelled from that school district," said Miller.
A spokesperson for the Horry County School District can't release disciplinary information, but did say he was withdrawn from Green Sea Floyds High in April.
Doctor Miller says without the surveillance system, the situation could have been more serious.
"Bringing a gun is a very very dangerous serious charge to school. You see the disruption it caused at Mullins High School from someone on the outside."
NewsChannel 15 is still trying to find out if the boy faces any criminal charges in connection with the Horry County case.
He faces charges of disturbing schools and carrying a weapon onto school property for the Mullins incident.
The boy is expected to be in family court next week.