An Adelaide man can again challenge his 1994 murder conviction for drowning his fiancee in the bath.
Supreme Court Justice Kevin Nicholson said on Tuesday the grounds put forward by Henry Keogh's lawyers were "reasonably arguable", as was their contention there was a substantial miscarriage of justice.
He referred the case to the Full Court of the Court of Criminal Appeal to determine whether the case came under new SA legislation that allows an appeal based on fresh and compelling evidence.
If the court decides it does, it would then hear his new challenge.
Keogh, who says her death was a terrible accident, is serving a minimum 25-year jail term for murdering Anna-Jane Cheney in the bathtub of their home in March 1994.
He has lost numerous appeals, but his lawyer had argued there was fresh and compelling evidence, including the possibility his fiancee might have suffered an extreme allergic reaction.
Prosectors had claimed Keogh drowned Ms Cheny by grabbing her legs and lifting them up over her head.
Referring to an alleged grip mark on her leg, his lawyers said there was now evidence from a sample of her tissue that showed the bruise was at least three to four days old at the time of her death.
