Looking back, I think he intended to entrap Ned Stark.
“People of Sherrer, I cannot give you back your homes or your crops, nor can I restore your dead to life. But perhaps I can give you some small measure of justice, in the name of our king, Robert.”
Every eye in the hall was fixed on him, waiting. Slowly Ned struggled to his feet, pushing himself up from the throne with the strength of his arms, his shattered leg screaming inside its cast. He did his best to ignore the pain; it was no moment to let them see his weakness. “The First Men believed that the judge who called for death should wield the sword, and in the north we hold to that still. I mislike sending another to do my killing... yet it seems I have no choice.” He gestured at his broken leg.
Instead he sent Beric, and you know what happened to him.
