Although he doesn’t mention it directly, what happened on the cross to the Lord Jesus feeds into the ideas which James presents in his letter.
The missing cross
Bad news
Due to his disobedience of God, Saul comes to a tragic end, taking his family and his kingdom down with him.
Contacting the dead
Due to his sin, Saul is all alone and frightened of his enemies. David will not help him; God will not help him; he’s in a living death.