Ms Galleghan asked the community to keep fighting for Jason “so that justice is served”.
Police have so far charged four boys, aged 14, 15 and two aged 13; a 15-year-old girl; a 19-year-old woman; and a 29-year-old man over their alleged roles in Jason’s death.
Investigators on Tuesday released new footage as they continue to investigate the teenager’s alleged murder.
The CCTV shows two men walking near the home on Perigee Close about the time of the fatal assault.
The first man is described as of Pacific Islander/Maori appearance and is seen wearing a black hooded jumper, black long pants, white sneakers and carrying a drink bottle.
The second man depicted in the CCTV is described as wearing long black pants, a bright red and black hooded-jumper and carrying a black, red and blue item.
Blacktown Police Area Commander, Superintendent Steve Egginton, said the men may hold vital information about the events leading up to Jason’s death.
“Strike Force Brens detectives have worked tirelessly to investigate the alleged murder of Jason and will continue to follow all lines of inquiry relating to this matter – leaving no stone unturned,” he said.
“I urge anyone with information, no matter how insignificant you believe it to be, to come forward and contact Crime Stoppers.”