Two sentenced over NT man's murder

Two men have been sentenced over the death of a Northern Territory man in far north Queensland.

The man's body has never been found.

Roy Curtis McLeod was reported missing in June 1993.

The Supreme Court in Cairns heard the 31-year-old tended a cannabis crop near Lockhart River with Jason Mark Mannion and Mannion's girlfriend.

Mannion's lawyer argued that the couple feared for their lives when McLeod threatened to kill them if they left the crop site.

The court heard Mannion later admitted to friends that he fatally shot McLeod.

Mannion's friend, Peter John Pitcher, later burnt the body in bushland.

After pleading guilty to manslaughter Mannion was sentenced to eight years in prison.

Pitcher pleaded guilty to interfering with a corpse and was released on parole.