Police have released an image of a man wanted for the murder.
Travis Murdoch, a 20-year-old man, is wanted on an outstanding warrant for a murder in Riverstone last month.
He is described as being Aboriginal/Torres Strait Islander in appearance, between 170-180cm tall with a large build, short cropped black hair, and moustache.
He is known to frequent areas such as St Marys, Mt Druitt and Quakers Hill.
Anyone who may have information that could assist in the arrest of Mr Murdoch is asked to contact detectives at Riverstone Police Station, or Crime Stoppers on 1800 333 000.
Anyone with information about this incident is urged to contact Crime Stoppers: 1800 333 000 or https://nsw.crimestoppers.com.au. Information is treated in strict confidence.