A German court last week rejected his appeal against an earlier ruling that prevented him from obtaining a gagging order on the family.
German judges rejected Dr Ubani’s initial attempt to stop the family from speaking out last August.
Rory Gray, whose father David died in 2008 after Dr Ubani gave him an overdose of diamorphine, welcomed the court’s decision to reject the appeal.
But he hit out at a ban on open reporting of the case in Germany, which remains in place. Mr Gray called the ban ‘abhorrent and almost evil’.
A separate German court recently fined Dr Ubani but ruled he could continue to work as a doctor, a decision strongly opposed by Mr Gray. Mr Gray said that the facts about the case should be publicly available to any potential patient of Dr Ubani.
‘It beggars belief that the German authorities have chosen to do this,’ he said.