A woman has been charged over her alleged role in the murder of Zac McRae at a Western Sydney bus interchange in August.
Emergency services were called to North Parade in Mount Druitt on August 27 to find two 19-year-old men with stab wounds.
One of the victims, Mr McRae, was stabbed in the chest and died at the scene.
The other man was taken to hospital in a stable condition and has since been released.
On Tuesday, detectives executed two search warrants in Dapto and Vineyard.
At the Dapto address, police arrested a 19-year-old woman.
She was taken to Lake Illawarra Police Station, where she was charged with murder, conceal a serious indictable offence, failing to disclose the identity of driver or passenger, and participate in a criminal group or contribute to criminal activity.
She was refused bail to appear in Bail Division Local Court 3 on Wednesday.
It will be alleged she drove other alleged offenders to the scene.