Luigi Mangione, the 27-year-old accused of killing UnitedHealthcare CEO Brian Thompson, has been granted a limited delay in his federal stalking trial.District Judge Margaret Garnett scheduled jury selection for October 5 while the defendant faces an overlapping state murder trial starting in June.The federal case follows the fatal December 4 shooting outside a Midtown hotel where Thompson was attending an investor conference.Mangione faces life imprisonment if convicted on federal stalking charges despite the dismissal of a federal murder charge in January.