A somber and frail Nelson Mandela attended the funeral today for his 13-year-old great-granddaughter in Johannesburg, who was killed in a car crash. Zenani Mandela died in a car acciedent after the World Cup's opening concert. The 92-year-old anti-apartheid icon emerged stiffly from a car and leaned on a walking stick. He was ferried in a golf cart to the brick chapel of the Johannesburg private school Zenani Mandela had attended and took a front pew. Mandela's face was somber. A corsage of pink roses was pinned to the lapel of his black coat. <br/><br/>Police say a close family friend who was driving the car that crashed the night of June 10 could be charged with drunk driving and homicide. Zenani was a member of the choir, marimba club and drum corps of St. Stithians College where her funeral was held, and wanted to be a plastic surgeon. After Zenani died when the car she in crashed on a<br/>highway, Mandela decided not to attend the tournament's opening ceremony and first game as had been planned.<br/><br/>Mandela's public appearances are increasingly rare. A private burial was held earlier today. The public had been welcomed to the chapel service, and several hundred people attended, including an overflow crowd in a tent outside. Mandela was accompanied by his wife, Graca Machel. Also present was his ex-wife, Winnie Madikizela-Mandela, who is Zenani's great-grandmother.