BELLVILLE, IL (KSDK) — Classes at two Belleville, Illinois high schools were canceled Wednesday afternoon after the school district received a report of a shooting threat they deemed credible.

That report came after a quick-thinking mom made a call to police concerning her own son.

“I just want everybody to know that this is totally out of my son’s character,” said Marshanice Mackey. “This is nothing he’d do, and I need to get his name cleared.”

She said it was a tough decision but one she ultimately had to make, because before she could clear his name, she had to get it out to police and school leaders.

Police said this all started at around 1 a.m., when they received a call from Mackey, who reported her teenage son missing. Mackey told police her son — 18-year-old Derek Burton — was upset about his girlfriend. She said he made suicidal comments, and she noticed her handgun was missing.

Police took that information and used it to warn the school district. Because of the warning, classes at Belleville East and West High Schools were canceled.

Her son was taken into custody just before 8 a.m. Wednesday, before anyone was harmed.