POLICE believe they have identified the getaway car used by the killer of a teenage boy and have warned "it's only a matter of time" until the vehicle is found.
Brayden Dillon, 15, was shot in the head as he slept in his bed on April 14, Good Friday, in his Glenfield home, in Sydney's southwest, in what may have been a revenge killing.
His brother Joshua, now 19, is facing charges over the stabbing murder of Adam Abu-Mahmoud, 18, that allegedly occurred during a street brawl outside a convenience shop in 2016. He has denied being responsible for Mr Abu-Mahmoud's death.
Homicide Squad detectives had scrutinised hours of CCTV footage and have zeroed in one car they believe was involved.
"Detectives have reviewed hours of CCTV throughout the Glenfield area tracking numerous vehicles, but this one is the only one which fits the time frame," Detective Chief Inspector Mark Henney, of the Homicide Squad, said.
"This car arrives in the area about 15 minutes before the murder and is seen leaving the area less than five minutes after the murder."
Investigators have released CCTV of the vehicle, which is described as a white Mazda 3 hatch, with what appears to be white registration plates and a green P-plate.
"Unfortunately, the registration is not clear in any of the vision we have reviewed, and while we are still going through other CCTV, we hope a member of the community may be able to assist - either by recognising the car or possibly captured on a dash-cam," Det Insp Henney said.
"It's only a matter of time before we find it ourselves, but we'd love someone to help speed the process up.
He was confident once the vehicle was located "we will be able to identify those responsible for the murder."
Brayden's killer - armed with a handgun - smashed his way into the house through the front door and ran up a flight of stairs, past Brayden's mother, before reaching the bedroom where the fatal shot was fired.
"From the information we have gathered, the murder was planned and calculated, so it's likely there are people who know what happened, even if they weren't directly involved," Det Insp Henney said.
"Brayden's murder was particularly callous - this was a 15-year-old boy who was shot dead while he slept in his bed over the Easter weekend.
"This Wednesday would have been Brayden's 16th birthday, and we hope the community will help us give his family the gift of justice."