Police are seeking to extradite a Melbourne woman over two gangland shootings before the death of Marco Tapia on September 1.
According to court documents, police allege the gun used in the two shootings matches the weapon used to kill Mr Tapia in Sydney's south-west.
Documents state the woman allegedly drove from Victoria with a group of men who they say were involved in the spate of shootings.
Mr Tapia, 23, died after masked gunmen entered his Glen Alpine home and shot him dead on September 1.
The university student was the sixth mistaken identity murder linked to Sydney's underworld war in the space of 18 months.
In documents got by the ABC from a Victorian court, NSW Police will allege a group of Melbourne men were involved in two shootings linked to the ongoing feud between the Alameddine crime family and the self-proclaimed "Coconut Cartel".
Two teenagers on Thursday were charged over their alleged roles in the murder of Mr Tapia.
The Melbourne woman, 26-year-old Amenah Abusud, is alleged to have been "recruited by an organised crime network, was tasked, and received payments to participate" in two shootings before Mr Tapia's death.
Police said in their statement of alleged facts that blood from one of the shootings identified one of the Melbourne men and gun cartridges were matched to a third shooting: the death of Mr Tapia a day later at Glen Alpine.