The narrator emphasized that David sent Abner safely on his way as a friend and an ally (restated in 2 Samuel 3:22–23). David was at peace with Abner and was not involved in the killing of this well-known military leader (see 2 Samuel 3:28–29).
Despite Abner's murder (2 Samuel 3:27), the northern tribes later did make a covenant with David to make him their king, just as Abner had promised earlier (2 Samuel 5:1–3).