Hay River RCMP have arrested and charged a fourth person over the death of a man in the community late last month.
Tyler Cayen, who is 32, is charged with murder and robbery. Three other people are already facing the same charges: Sasha Cayen, 25; James George Thomas, 25; and Levi Cayen, 20.
Police say all four are local residents.
The investigation centres on a body discovered near the Wilderness Lodge Road, an access road in the Sandy Creek area of Hay River.
A dead man was found in the area by police on December 28. The man's name and age have not been released.
Tyler Cayen is in custody and scheduled to appear in a Yellowknife courtroom on February 6. RCMP say their investigation is continuing.