TMZ, Elvis Presley’s grandson, budding musician Benjamin Keough, died in Calabasas, California on Sunday from a self-inflicted gunshot wound.In a statement, Lisa Marie’s manager, Roger Widynowsk, declared her boy “the love of her life.”“She is completely heartbroken, inconsolable and beyond devastated but trying to stay strong for her 11 year old twins and her oldest daughter Riley,” it read. “She adored that boy.