A Kiwi euthanasia advocate now faces a second charge of murdering a disabled person.
According to the BBC, Sean Davison appeared in the Cape Town Magistrate's Court on Friday on two counts of murder. Charges he denies.
The 75-year-old forensic scientist founded the right-to-die organisation DignitySA.
Davison is now accused of killing Justin Varian by placing a bag over his head and administering helium, the BBC reports.
Varian died on July 25, 2015. He had been diagnosed with motor neurone disease some years prior.
Davison was already charged in relation to the death of friend Anrich Burger, 43, on November 2, 2013.