Maybe Laban should also be seen as a "type" of the wicked people in Jerusalem. Maybe his death was a final warning. It may have helped the people in Jerusalem to be less confident and to repent. The next morning they would have found Laban with his head chopped off. The only punishment under the Law of Moses that was enacted by a sword was in the destruction of an apostate city (Deuteronomy 13:15). Maybe it was a last-ditch warning to say to Jerusalem, the prophecies about the destruction of Jerusalem are really going to happen.