Fribjon Bjornson, 28, was last seen at a convenience store in Vanderhoof in Jan. 2012.
Three weeks later his severed head was found about 60 kilometres away, in a vacant house on the Nak'azdli reserve near Fort St. James. The rest of his body was never found.
On Sunday, Bjornson's father, Fred Bjornson, told CBC News four people had been arrested in connection with the death.
On Monday morning, RCMP Const. Leley Smith confirmed three men and a woman were charged over the weekend.- Wesley Duncan, 27, is charged with second-degree murder.
- Jesse Bird, 31, is charged with accessory after the fact, and indignity to human remains.
- James Charlie, 23, is charged with indignity to human remains.
- Teresa Charlie, 21, is charged with accessory after the fact.
All four are appearing in court Monday. Smith says more people could be charged.
"Our major crime investigators have been working extremely hard over this past year in order to identify and charge those responsible for this horrific crime," said Smith.
Bjornson's father said residents told him they were afraid of going to authorities with information because of retaliation.