LARGO — The murder trial of Arunya Rouch, who is accused of fatally shooting a coworker in the parking lot of a Tarpon Springs Publix two years ago, was postponed at a hearing Friday afternoon. Rouch's trial on charges of first-degree murder and attempted murder of law enforcement officers had been scheduled to begin March 13. Instead, a judge scheduled a hearing for March 15 to determine whether Rouch is competent to stand trial. Rouch is accused of shooting Gregory Janowski, 40, whom Rouch blamed for getting her fired from her job at Publix. After the shooting on March 30, 2010, she exchanged gunfire with Tarpon Springs police, authorities said.