An 18-year-old man has been arrested over the triple slaying of a family in Kapunda, South Australia.
Police said on Tuesday night that the teenager will face the Elizabeth Magistrates Court on Wednesday charged with the murders of Andrew and Rose Rowe and their 16-year-old daughter Chantelle.
The trio were stabbed to death in their home just over a week ago in the town 80km north of Adelaide.
Police had narrowed their search to the friends of Chantelle in recent days.
But it wasn't until Tuesday night they arrested a man from the town and told reporters he was shortly to be formally charged, and to face a late night local court.
The arrest came after police appealed for help finding the owner of a four-wheel drive that was seen at the house just before the murders on November 7.
They had obtained a DNA profile from the crime scene and located a witness who saw a four-wheel drive outside the home where the trio were stabbed to death a week ago.
Detective Superintendent Grant Moyle earlier on Tuesday asked anyone who may know, or may have inadvertently helped, the killer to come forward.
"If anyone is out there that knows the offender in this case, has any further information in regard to who may be involved, may have assisted the offender either before during or after this offence, now is the time to come forward," he told reporters.
He said it was not unusual for more than one person to know about a crime or to become involved in it unintentionally after the fact.
"I ask you to reflect on the nature of this crime and assist police."
