Daisy Hill mum Kiesha Thompson, aged 23, was allegedly murdered by her ex-partner and his new girlfriend, according to police.
Ms Thompson died on Friday 19 July, just hours after she was hit by a car on Allamanda Drive after dropping her three-year-old daughter to daycare.
Police have since charged two people with murder over the alleged hit and run.
On Sunday 21 July a 24-year-old Goodna woman was charged, with police alleging she was the driver of the car that hit Ms Thompson.
On Monday 22 July a 27-year-old Acacia Ridge man was arrested and also charged with murder.
Police do not believe he was in the car at the time of the alleged murder but do allege he was a “participant in the planning and preparation of that offence”.
Logan Detective Inspector Chris Knight said the alleged offenders were in a relationship.
He said the 27-year-old man is the former partner of Ms Thompson, who she shared a child with.
“In Queensland, anybody who participates in the planning or preparation of committing an indictable offence are deemed to be principal offenders,” Mr Knight said.
“The person we charged; we will allege has involvement in the offence other than driving the vehicle.
“We certainly will be alleging he was a participant in that murder… [and] equally involved.”
When asked if the alleged offenders’ motives related to “that prior relationship and custody of that child”, Mr Knight said: “We will be making allegations to that effect.”
“I’ve been an investigator for more than 30 years,” Mr Knight said.
“I’ve spent a very large portion of my career doing homicide and death investigations, and I can honestly say that there are features that we’ve identified in this investigation that will stay with me.
“It is a horrendous crime.”
Police allege Ms Thompson was “deliberately struck” by a silver Toyota Prado just before 9am on the footpath along Allamanda Drive.
“She was transported to the Princess Alexandra Hospital in a critical condition where she died as a result of her injuries,” a police statement said.
Ms Thompson’s family released a statement on Monday afternoon.
They said the pain of losing her “could not be put into words”.
“Despite the immediate and heroic efforts of the first responders, we sadly lost Kiesha later that day,” Ms Thompson’s aunt Amanda Matthias said.
“We are deeply grateful for those who worked tirelessly to save her.
“We are struggling to understand why anyone would commit such a cruel act.”
Ms Thompson’s brother, Koby Torto, said Ms Thompson tried to create the best life for her daughter.
“She had nothing short of a difficult life, but in the past couple of years she worked tirelessly to create the best life for not only her, but her child, who was the absolute light of her life,” he said.
“Her life, up to the end, was exactly what she wanted, but she was taken from us in a cowardly act.”
The 27-year-old Acacia Ridge man appeared in Brisbane Magistrates Court while the 24-year-old Goodna woman has been remanded in custody and is expected to reappear in Beenleigh Magistrates Court on 31 July.
Police are continuing to appeal for information, including anyone with dashcam vision, who were travelling in the Daisy Hill area near Allamanda Drive between 5am and 10am on Friday.
Ms Thompson’s family have started a Gofundme to raise money for her daughter.
It can be accessed here: gofund.me/fc00e20c.
