A Queensland mother and her bother were murdered in a case of mistaken identity, detectives have confirmed.
April and Ian Bailey were found dead inside their fire-ravaged home at Deception Bay, north of Brisbane, on May 28, 2004.
Last week, 34-year-old Danielle Lee Fels was arrested over the incident as police made a fresh appeal for information, suspecting up to four people were involved in the crime.
Detective Inspector Damien Hansen confirmed the siblings, who were allegedly killed in front of April's four-year-old daughter Violet, were targeted because of the actions of another woman called April from the same area.
"April had come into possession of a large quantity of drugs," he told The Courier-Mail.
"But it was not April Bailey - they've got the wrong April.
"It's not even the wrong place at the wrong time. They were targeted through just an unfortunate set of circumstances."
Det Insp Hansen this week urged a mystery caller with vital information to phone investigators back.
The anonymous caller was among more than 15 people who phoned police after seeing media coverage of Fels' arrest.
Violet, now 17, has urged anyone with information to come forward and an offer of a $250,000 reward and indemnity from prosecution still stands.
Fels appeared in court on Monday morning and was remanded in custody until December 20.
