Lisa Marie Presley’s former manager feared she would never survive her grief over her son’s death before she passed away. The late singer – who is the only child of Elvis and Priscilla Presley – died on 12 January 2023 aged 54 and was left devastated in July 2020 when her boy Benjamin Keough took his life aged 27. Jerry Schilling – the US talent manager who was a member of Elvis’ Memphis Mafia entourage in the 1960s – has now spoken out about the grim impact Ben’s death had on Lisa Marie, to mark the one-year anniversary of her passing. He told People: “Since the loss of her son, Ben Storm, Li…