On 14 May 1991, Winnie Nomzamo Mandela, the then-wife of Nelson Mandela was sentenced to six years in jail by a Johannesburg court presided over by Justice Michael Stahl Stegmann for her involvement in the kidnapping and beating of four youths suspected of being police informers. One of the youths, 14-year old Stompie Seipei died from the injuries he sustained. Winnie appealed against the verdict and the sentence was commuted to a fine and a two-year suspended sentence by the Appeals court.   The assault and murder were committed by members of the Mandela United Football club who acted as bodyguards and enforcers for Winnie. One of the members, Jerry Richardson (who died in 2009 in Leeukop Prison) was sentenced to life for the murder. Richardson had also testified against Winnie in the criminal case and later in front of the Truth and Reconciliation Commission (TRC).
References

Liston,E., Bodies exhumed in ANC ‘murder’ case linked to Winnie Mandela, from Independent news, [online], Available at www.independent.co.uk [Accessed: 9 May 2014]|Encyclopaedia Britannica, Winnie Madikizela- Mandela, from Encyclopaedia Britannica, [online], Available at www.britannica.com [Accessed:9 May 2014]