Kim Duncan, aged 65, was wounded by a gunshot to her leg within a residence on Dickens Road in Ambarvale, located south-west of Sydney, at approximately 11pm on April 14.
The occupants of a black sedan allegedly discharged nine bullets into the house before fleeing the scene.
Duncan was reportedly in a front lounge room when she was struck by a bullet.
Paramedics tried for about an hour to save her, but she died at the scene.
Police have released CCTV footage appearing to show three men who were seen in the area at the time.
The first man is described as Caucasian, 180cm tall, with thin build and in his 30s.
The second man is described as Middle Eastern, around 185cm tall with athletic build and in his 30s.
And the third man is described as Pacific Islander, about 180cm tall with a large build and in his 20s.
Two cars, a white SUV and a blue sedan, were also seen driving off.
