The public defender representing Robert Montoya in his sexual assault trial in Greeley has requested a postponement. The request for additional time to review new information was granted yesterday for the trial originally scheduled to begin Monday. The 18-year-old Montoya is accused of having a relationship with Kayleah Wilson, a 12-year-old who was found dead in a drainage ditch two months after she disappeared. Montoya has not been charged in Wilson's death. His trial has been rescheduled for March 21.