The advocate of ewtanasia Kiwi now faces the second lawsuit for the murder of a disabled person.
According to the BBCSean Davison was on Friday at the Cape Town Magistrate Court in two counts of murder. Charges that deny them.
A 75-year-old forensic scientist has established the right to mortality of DignitySA.
Davison is now charged that Justin Varian was murdered by putting a bag in his head and running helium BBC reports.
Varian died on July 25, 2015. The disease of motor neurons was diagnosed a few years earlier.
Davison was already charged with the death of a friend, Anrich Burger, on November 2, 2013.
After the car accident, Burger became quadriplegic.
Davendon, born in Auckland, moved to South Africa in the early nineties and became a professor of biotechnology at the University of Western Cape.
Davison was already famous in New Zealand when he was sentenced for the death of his 85-year-old mother, who had breast cancer.
Archbishop Desmond Tutu wrote to the judge who asked for leniency and gave Davison a reference, BBC reports.
Davison was five months in house detention after pleading guilty to aiding his mother's suicide before returning to South Africa in 2012.
He is currently in custody and will have to return to court on 29 January.
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