Indeed, when the Nephites kept the commandments of God, when they followed the direction of their prophet leaders, the Liahona led them toward the promised land. Thus the Liahona was a symbol of their faithfulness, a visible evidence of their standing before God.“Thou Art Condemned to Die”
Nehor had taken a man’s life, and according to the laws of God and man his own life was required (see Alma 1:18; Alma 30:10; JST, Genesis 9:12-13; D&C 42:19).