johannesburg south africa justice minister michael masutha friday deny parole killer anti-apartheid leader chris hani say express remorse murder janusz walus serve 20 years life sentence assassination hani senior member now-ruling african national congress anc head south african communist party walus 64 emigrate communist poland 1981 become involve far-right politics south africa shoot hani outside anti-apartheid activist home 1993. kill trigger nationwide riot threaten derail south africa 1994 transition multi-racial democracy decades white apartheid rule masutha also block walus parole application 2015 decision trigger several court challenge supreme court appeal refer matter back justice minister reconsideration masutha say friday psychologist report highlight walus political ideology risk factor report say walus express remorse fact victim children fatherless wife widow however show remorse murder chris hani still rationalize action insist politically motivate ideas communism still stand killer south african anti-apartheid leader hani deny parole