Millicent man Bo Krister Olsson has pled guilty to the double murder of his partner and mother.
The two were found when Olsson reported the location of their bodies to police in Berri, over 400 kilometres away from the murder scene on Plunkett Terrace in Millicent.
Olsson was not scheduled to enter a plea until later this year, with the date brought forward by his lawyer.
Olsson faces a mandatory sentence of life in prison, carrying a standard non-parole period of at least 20 years. Unless a judge finds special circumstances, which can include early guilty pleas and co-operation with police.