CCTV footage shows a car driving close to Ashley Dale’s home only shortly before the 28-year-old was gunned down in her own back garden.
Officers investigating the fatal shooting released the video in the hopes someone could help them identify the car, bringing them closer to solving the horrific killing.
Merseyside Police previously said they did not believe Ashley was the intended target of the attack, which happened at around 12.40am on Sunday morning.
Officers were called to Ashley's Liverpool home where the 28-year-old was found in the rear garden of the property with gunshot wounds.
Detectives said CCTV enquiries show a silver saloon-style car driven into the road at around 12.30am.
They want to quiz the driver or any passengers, as they believe they may have vital information which could help their investigation.
Detective chief inspector Cath Cummings said: "Our officers are working round-the-clock to investigate this appalling incident which led to the tragic death of a young woman.
"Our enquiries so far show that a car was driven into Leinster Road, not too long before the incident was reported to police.
"If it was you driving the car, you were a passenger or the CCTV jogs your memory about anything you might have seen in the early hours of Sunday morning then please get in touch.
"Information you have could be crucial to our ongoing investigation.
"From reviewing CCTV footage in the area, we have also identified that there were a number of people on foot around the time of the incident.
"A boxing match had not long finished and so the area was relatively busy with people on foot, going home or into town after the match.
"If you were walking in the area of Leinster Road or on Prescot Road, including the crossroads near the Navigator pub between 12.20am and 12.40am on Sunday morning then please let us know.
"You may have seen or heard something which could really help us find those responsible.
"Similarly, I would ask taxi and delivery drivers if they were driving in the area between 12.20am and 12.40am and have dashcam footage please contact us.
"Please come forward with anything you know to help us to get justice for Ashely's family and put those responsible for this horrific incident before the courts."
Tragically, Ashley’s younger brother, Lewis Dunne, was killed in 2015 aged just 16 in another case of mistaken identity after a gang mistook him for a rival member.
Their deaths are not believed to be connected.
Her family had previously paid tribute to Ashley as their “shining light”.
In a moving statement, issued via Merseyside Police, the family said: "Ashley, our girl – our shining light.
"Our hearts are broken into a million pieces. Ashley was a hard working young woman, who had her entire life ahead of her.
"She had just been promoted at her job with Knowsley Council.
"She had a degree and so many plans for her bright future that had only just begun. Her laugh, smile and energy was infectious in any room.
"We can’t come to terms with how this would happen to a defenceless woman in her own home. None of this makes sense and our lives will never be the same again.
"A senseless crime that has torn a family apart. Justice needs to be brought.”
Her death also came just two days before little Olivia Pratt-Korbel was gunned down in her own home.
The nine-year-old was shot and killed by a masked assassin and both tragic shootings, there is no suggestion they are linked, have rocked the city of Liverpool.
