Bandidos OMCG Central West Chapter President Shane De Britt was shot dead at his Eurimbla farmhouse, about 50 kilometres south of Wellington on January 14.

So far detectives have arrested five men - aged 58, 39, 38, 37 and 22 - and a 34-year-old woman.

All six were charged over their alleged roles in the shooting murder and remain before the courts.

Following further investigations, a 39-year-old man was arrested at Orange on Wednesday and charged with murder and participating a criminal group.

He was refused bail to appear at Orange Local Court on Thursday.

Australian Associated Press