Government welcomes harsh sentences for GBV perpetrators as Palesa Madibaâs killer gets 31 years By Sameer Naik Government has welcomed the heavy jail sentences handed out to perpetrators of gender-based violence (GBV). This comes after convicted murderer Dumisani Mkhwanazi was yesterday sentenced by the South Gauteng High Court in Johannesburg to 31 years in jail for the murder of his niece Palesa Madiba. Earlier this year, Mkhwanazi was found guilty of killing the University of Johannesburg student on August 12, 2013, after Madiba was last seen at her friend's home in Phiri, Soweto. The young woman's remains were found buried in a shallow grave at the Mkhwanazi home in 2015.