Detectives from Hunter Valley Police District established Strike Force Awabakil to investigate the circumstances surrounding the death of a man in Glenridding.

About 5.30am on Saturday, September 29, 2018, emergency services were called to Carrington Street after a man's body was located on the side of the road. He was later identified as 43-year-old New Zealand firefighter, Ian Pullen.

He was in the Hunter to help with bushfire season when his body was found next to Carrington Street at Glenridding. He had been the apparent victim of a hit-and-run, but detectives have now established he was first hit with a Toyota Hilux utility which fled the area, before the vehicle returned to the scene and two people got out of the car striking Mr Pullen in the head with an object.

In October police charged 29-year-old Singleton man Joshua Knight with murder, dangerous driving occasioning death and failing to stop after a vehicle's impact had caused death.

Police later attended a home on Dominion Avenue, Singleton, and arrested a 30-year-old woman who was also charged with murder.

On Monday detectives attended a Whittingham home and arrested a 21-year-old woman.

She was taken to Singleton police station and charged with accessory after the fact to murder.

Following further inquiries, about 11.30am yesterday (Wednesday, November 25), police executed a search warrant at a home in Singleton and arrested a 27-year-old woman.

She was taken to Singleton Police Station and charged with accessory after the fact to murder and do act intending to pervert the course of justice.

The woman was refused bail to appear at Muswellbrook Local Court today (Thursday November 26).