Matt Young, director of Chatfield School in Lapeer, said the security officer committed a "breach in security protocol Jan. 14 when he left an unloaded firearm unattended in the restroom "for a few moments," mlive.com reported Friday.
"The school has put additional security procedures in place that follow local law enforcement practices and guidelines," Young said in a statement. "At no time was any student involved in this breach of protocol. We will continue to work on improving school security."
He said no students were in danger but declined to provide details, including whether the school would take action against the guard, who was identified only as a retired Lapeer County Sheriff's Office employee.
Lapeer County Prosecuting Attorney Byron Konschuh said criminal charges were unlikely, since no one was injured.
"It's almost like no harm no foul," Konschuh said.