Where the plaintiff ingested a controlled substance pursuant to a valid, but expired, prescription, evidence of ingesting the controlled substance is insufficient to establish abuse, absent an explicit statutory instruction.The Illinois Appellate Court, 1st District, reversed and remanded a decision by Cook County Circuit Judge Sophia H. Hall.Mister Walker was first employed as a Cook County deputy sheriff in October 1980. He remained at the position for 32 years. As of April 2011, he had no disciplinary history. Prior to …