A janitor at Ohio State University kills one of his supervisors before taking his own life. It happened around 3:30a.m. Tuesday morning. Police say 51-year old Nathaniel Brown enetered a campus maintenance building early this morning and shot two supervisors in an office suite, killing one of the men. Brown was found with a self inflicted gun shot wound in a garage. He died a few hours later. Police say Brown was told last Saturday he would lose his job. He had recently received a poor evaluation after his supervisors complained he was tardy, slept on the job and had problems following instructions.