SIOUX CITY, Iowa (AP) — Another trial starting date has been set for a 19-year-old in northwest Iowa accused of stabbing to death his ex-girlfriend and another young man. Woodbury Country District Court records say a judge cited scheduling and other problems in setting a new date to begin the trial of Tran Walker. The trial had been set to begin this coming Tuesday. The new starting date is May 2.

Walker’s pleaded not guilty to two counts of first-degree murder. He’s accused of killing 17-year-old Paiten Sullivan and 18-year-old Felipe Negron Jr., who both lived in Sioux City. Police say Walker was in a car with the other two on Jan. 28 last year when he began to stab Sullivan because he was upset that she had broken up with him. Police say that when Negron tried to intervene, Walker stabbed him, too.