Jack Westren, 25, died from a stab wound on January 28 near the Shellharbour Junction train station at Dunmore.
Police have upgraded the charges against five teenagers to murder in relation to his death.
A 38-year-old woman, Tamara Lee Doust, was previously charged with murder and accessory after the fact to murder.
A 15-year-old boy was also charged with murder and possessing an unauthorised pistol, allegedly a gel blaster.
Six other teenagers were subsequently charged with offences related to the events of January 28.
No additional statements were provided by the authorities.
Author's summary: Teens charged with murder over stabbing.