Detectives allege Scott Graham Marle knows what happened to Darryn Royce Willis in December 2010, but has kept it a secret since.

Marle fronted Moree Local Court for the first time on Monday, six weeks after he was arrested by Strike Force Barca.

The Times revealed Marle's arrest last month, after he presented to detectives at Moree police station on October 1.

The 50-year-old is facing one count of concealing a serious indictable offence of another person, namely murder, and was not required to enter a plea to the charge on Monday.

Magistrate Mark Richardson adjourned the case until the new year, with a brief of evidence ordered.

Marle remains on conditional bail.

Marle is the third charged in connection to the murder of Mr Willis, whose remains have never been found.

His arrest came one year on after co-accused Robert James Stonestreet and Bruce Anthony Coss were charged.

Stonestreet is accused of concealing the murder, while Coss is accused of killing Mr Willis after a night out at the Imperial Hotel in Bingara on December 10, 2010.

Detectives allege Coss struck Mr Willis near his Bingara home, and killed him. He's then alleged to have dumped Mr Willis' body at an unknown location. His remains still have not been found.

Strike Force Barca was set-up by New England detectives to investigate Mr Willis' murder.

Coss remains bail refused, but neither have been required to enter pleas to the charges.

Stonestreet remains on bail and is subject to a number of conditions, including that he can't contact his co-accused, drink alcohol, or enter Bingara.

If found guilty of concealing a serious indictable offence of another, namely murder, Stonestreet and Marle face a maximum of five years' imprisonment.