Kiesha Thompson was killed in a hit-and-run. Police allege her ex and his new girlfriend planned it.

Content warning: This post deals with descriptions of domestic violence. 

On Friday morning, around 9am, Kiesha Thompson dropped her daughter off at day care. 

As she left the centre and began walking along a footpath in Daisy Hill, south of Brisbane, she was struck in an alleged hit-and-run that was ultimately fatal. Police say it was 'deliberate'. 

She died in Brisbane's Princess Alexandra Hospital that night. 

Police now allege that Thompson's ex-partner and his new girlfriend planned the hit-and-run murder.

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Queensland Police first charged 24-year-old Larissa Rita Mae-Leigh Sant with murder after she was arrested in Ipswich. Sant was remanded in custody after her matter was mentioned in Ipswich Magistrate's Court on Monday. She will next appear in court on July 31.

After Sant appeared in the Ipswich court, police arrested a second person in relation to the incident — Thompson's ex-partner. 

27-year-old Tyler Scott William James was apprehended in Logan, and also charged with murder as a domestic violence offence. He too will next appear in court on July 31.

Detective Inspector Chris Knight said on Tuesday that James and Thompson were in an intimate relationship in the months before the alleged murder.

Police will allege their former relationship formed part of the motive for the attack. Det Insp Knight said James was allegedly involved in the planning of the murder but Sant was the sole driver of the car involved in the hit-and-run.

A 4WD vehicle — a silver Toyota Prado — was in the area for an extended period of time before the incident.

On Saturday officers seized the damaged silver Toyota Prado at Goodna, west of Brisbane.

"We will be alleging that (James) was a participant in the planning and preparation of the offence," Det Insp Knight told reporters. He also claimed that James and Sant were "equally involved" in the offence.

"I've been investigating for more than 30 years and spent a large portion of my career doing homicide and death investigations but there are features we have identified in this investigation that will stay with me," he said.

"We will allege that event was not in fact an accident and that lady who lost her life was in fact targeted. It is a gross understatement to say anything other than that family is deeply traumatised."

Floral tributes were placed at the site of the attack before Thompson's family released a video statement late on Monday.

In the footage, released by Queensland Police, Thompson's family fought back tears as they remembered the 23-year-old and vowed to take care of the "light of her life", her baby daughter.

"She was taken from us in a cowardly act," her brother Koby Torto said.

Thompson's aunt Amanda Matthias described it as a "horrific and senseless act".

Her sister, Keyara, said the pain of losing her sibling could not be put into words.

"We are struggling with the enormity of her absence in our life," she said.

Torto said the family would now rally around Thompson's young daughter.

"My sister Kiesha had nothing short of a difficult life," he said. "But in the past couple of years, she worked tirelessly to create the best life, not only for her but her child who was the absolute light of her life."

He added: "Her life up to the end was exactly what she wanted but as all good things come, so do bad and she was taken from us. We are here to support her (daughter) throughout her whole life."

The family have set up a GoFundMe account, if people wish to donate, funds going towards assisting Thompson's daughter. 

Kiesha is the 53rd woman allegedly murdered in Australia this year. 

With AAP

If this has raised any issues for you, or if you just feel like you need to speak to someone, please call 1800 RESPECT (1800 737 732) – the national sexual assault, domestic and family violence counselling service.

Mamamia is a charity partner of RizeUp Australia, a national organisation that helps women, children and families move on after the devastation of domestic and family violence. Their mission is to deliver life-changing and practical support to these families when they need it most. If you would like to support their mission you can donate here. 

Feature Image: QLD Police.