A handgun was discovered inside a vehicle in the parking lot of Antioch High School on Tuesday morning.
According to police, the gun was discovered during a routine canine scent search of vehicles.
When it was discovered, the student, a 21-year-old man in an alternative schooling program, was arrested.
“I would like to recognize District 117 on its commitment to ensuring the safety of students at our high school,” said Antioch Police Chief Geoffrey Guttschow.
The investigation is still ongoing, and no potential charges have been announced at this time.