Former suburban Chicago police sergeant Drew Peterson is due back in court as his trial on charges of plotting to kill a prosecutor approaches. A hearing in the case is scheduled for Tuesday in the southern Illinois county where Peterson is imprisoned. He’s pleaded not guilty to charges of soliciting an unidentified prison inmate to kill Will County State’s Attorney James Glasgow. Glasgow prosecuted the 2012 case in which Peterson was sentenced to 38 years in prison for the bathtub drowning death of his ex-wife Kathleen Savio eight years earlier. Her death was initially ruled an accident, but the case was re-opened after the 2007 disappearance of Peterson’s fourth wife. The Randolph County trial was scheduled to begin Monday, but has been rescheduled to start on August 28.