Stanley Covington was arrested Wednesday. He is charged with unlawful use of a weapon.

“He and the student began to argue and Covington pulled out a knife,” St. Louis County Prosecuting Attorney Robert McCulloch said.

McCulloch told FOX 2 the argument began when the student arrived to class late.

Covington is accused of having a knife that was “large” and had a “brass knuckle” shaped handle.