Baltimore man assaults his wife, self-surrenders to police officer that he knows. But the man’s arrest warrant goes missing under suspicious circumstances, and he is permitted to leave the station. He corresponds with the officer about self-surrendering the following week and in the meantime murders his wife (outside courthouse where she had just gotten a protective order). Fourth Circuit (2013): No qualified immunity for the officer. Fourth Circuit (2019, over a dissent): Discovery didn’t turn up evidence that the officer conspired with the man. Qualified immunity.