Police investigating the murder of Bao Chang Wang, known as Ricky Wang, have charged a fifth person in connection to his death.

A 23-year-old man has been charged with Accessory after the Fact to Murder and was due to appear in the Waitakere District Court on Monday afternoon.

A 37-year-old, who has interim name suppression, has already pleaded guilty to accessory to murder on June 10.

He's been remanded in custody and will appear for sentencing on July 28.

A 29-year-old man also charged with being an accessory to murder will stand trial in March 2021, while two men charged with the murder have denied the charges and are set to go to trial in July 2021.

Detective Inspector John Sutton previously said these arrests were the result of a concerted effort by a dedicated team of detectives working on Operation Quattro.

Police officers found the remains after a search at Rangipo Intake Rd, off the Desert Road in the central North Island in March.

Wang's whereabouts had been unknown since 2017.

"As the matter is before the courts, Police are not in a position to make further comment."