Benjamin Keough, the son of Lisa Marie Presley and grandson of Elvis Presley, has died at the age of 27.Keough died in Calabasas, California, on Sunday (12 July), with local news reporting the death as an apparent suicide.The news of Keough’s death was confirmed by Lisa Marie Presley’s manager Roger Widynowski on Sunday night, who told the Associated Press that the singer was “heartbroken”.“She is completely heartbroken, inconsolable and beyond devastated but trying to stay strong for her