Nassau police say they have arrested a student at Elmont Memorial High School after a switchblade was found in his backpack.

Detectives say they responded to the school at 555 Ridge Road on Tuesday afternoon after they received a 911 call. The 18-year-old was detained by school staff and was placed into police custody upon their arrival.

Police say Dayvion Campbell, from Elmont, is charged with criminal possession of a weapon and was released on an appearance ticket to return to the youth section of the First District Court in Hempstead at a later date.

With incidents like this on the rise recently, we spoke with a child psychiatrist. He says a child bringing a weapon to school requires serious intervention, including counseling.

"Limit their inappropriate aggression, teach them more prosocial behavior, and recognize when it's safe to have them in certain environments," says Dr. Victor Fornari, a child and adolescent psychiatrist.

Regina Agrusa, Sewanhaka Central High School District Superintendent, says safety is the top priority and they're taking this matter very seriously.

"Upon discovering the item, around dismissal time, school officials immediately contacted law enforcement and followed the appropriate safety protocols. While no threats were made, the District takes this matter very seriously. The safety, security, and well-being of our students and staff remain our highest priority, and we are committed to maintaining a safe and supportive learning environment," Agrusa said in a letter to the community. "Please be assured that in addition to any legal consequences the individual may face, the District will address this incident in accordance with our Code of Conduct.