An argument between two Oklahoma brothers turned deadly over the weekend, with one stabbing the other to death, Us Weekly has learned from investigators. The killing of Nicholas Spencer, 25, inside an Oklahoma City residence on Sunday, January 18, followed an argument over a video game, authorities said. Nicholas was allegedly stabbed to death by his younger brother, William Spencer, who is 19, police said. It was a game of Fortnite that led the siblings to squabble, but now, William is being held on a first-degree murder complaint.