Zenani Mandela, Nelson Mandela’s great-granddaughter, died in 2010 in South Africa.
Zenani was 13 when she was killed in a car crash.
Nelson Mandela stayed home after her death on June 11 even though Africa’s first World Cup opened; the Nelson Mandela Foundation said at the time that the tragic death “made it inappropriate” for the former president to attend.
The driver of the car that killed Zenani, Sizwe Mankazana, was acquitted in November 2012.
The magistrate in the case described the crash as a “freak accident,” BBC reported, citing the Sapa news agency.
Mankazana’s acquittal included him being cleared of reckless driving and driving under the influence of alcohol.
Zenani’s grandmother Zindzi is working on a campaign for road safety following the death.
The Associated Press contributed to this report.