Duduzane Zuma, the son of scandal-plagued former president Jacob Zuma, arrives at the Johannesburg Specialised Commercial Crime Court on charges of corruption. Picture: Siphiwe Sibeko/Reuters

More than a decade ago Acting Judge Mike Hellens made a ruling that helped to define the law around legal causation. But now that he has returned to his position as a defence advocate, and has chosen to take on Duduzane Zuma as a client, Hellens may have to argue against his own ruling.
In 2006, Hellens was the presiding officer in S vs Tembani, a case involving a Tembisa man who shot his girlfriend in a fit of rage.
She was taken to hospital, but received negligent medical treatment and later died.